A method, system, apparatus, and media for servicing an aircraft oil cooler

Abstract

The application discloses a kind of aviation oil cooler maintenance method, system, equipment and medium, related to aviation maintenance technical field, by collecting the QAR data of fleet aircraft after ground engine start and before APU is closed, the fleet oil temperature is obtained;According to the fleet oil temperature, generate alarm threshold, obtain several alarm temperature intervals;Each alarm temperature interval has normal duration and oil cooler pollution degree;The QAR data of the aircraft to be monitored is obtained, and the multi-day oil temperature is obtained;According to the multi-day oil temperature, the alarm temperature interval and the fault code, generate the maintenance measures of the aircraft to be monitored.Using the embodiment of the application, APU shutdown events caused by dirty oil cooler can be reduced, the original "cleaning after shutdown" is changed to "cleaning before shutdown", a large number of manual working hours are saved, and customer experience is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aviation maintenance, and in particular to an aviation oil cooler maintenance method, system, device and medium. BACKGROUND

[0002] Not all configured aircraft can monitor the oil temperature of the auxiliary power unit (APU) oil cooler, and the MRS (Maintenance Requirement System) inherent interval cleaning is generally used to achieve the cleaning of the oil cooler.

[0003] However, the inherent MRS interval cannot well control the cleaning of the APU oil cooler. Every spring and summer, as the temperature rises and the sand season comes, the aircraft fleet will have high oil temperature due to the blockage of the APU oil cooler, causing multiple APU protective shutdowns, which seriously affects the experience of passengers. SUMMARY

[0004] The technical problem to be solved by the present application is how to improve the APU monitoring system, and provide an aviation oil cooler maintenance method, system, device and medium, which can reduce the APU shutdown events caused by dirty oil coolers, change the original "cleaning after shutdown" to "cleaning before shutdown", save a lot of manual labor hours, and improve the experience of passengers.

[0005] To solve the above technical problems, the present application provides an aviation oil cooler maintenance method, comprising:

[0006] Collecting QAR data of the aircraft fleet before the engine is started on the ground and the APU is turned off, to obtain the oil temperature of the aircraft fleet;

[0007] Generating an alarm threshold according to the oil temperature of the aircraft fleet, to obtain a plurality of alarm temperature intervals; each alarm temperature interval corresponds to a normal duration and an oil cooler pollution degree;

[0008] Obtaining the QAR data of the aircraft to be monitored, to obtain the multi-day oil temperature;

[0009] Generating a maintenance measure for the aircraft to be monitored according to the multi-day oil temperature, the alarm temperature interval and the fault code.

[0010] As an improvement of the above-mentioned scheme, the generating of the alarm threshold according to the oil temperature of the aircraft fleet to obtain a plurality of alarm temperature intervals comprises:

[0011] Setting a pollution degree threshold of the pollution degree of the oil cooler;

[0012] Select the lubricating oil temperature corresponding to the contamination level threshold from the lubricating oil temperatures of the fleet as the alarm threshold;

[0013] Based on the alarm threshold, several alarm temperature ranges and the number of normal duration days corresponding to each alarm temperature range are obtained.

[0014] As an improvement to the above solution, the acquisition of QAR data of the aircraft to be monitored to obtain multi-day lubricating oil temperature includes:

[0015] Acquire QAR data of the aircraft under monitoring after the ground engine is started and before the APU is shut down to obtain the real-time lubricating oil temperature at several times over multiple days;

[0016] Calculate the mode of the real-time lubricating oil temperature, and take the maximum value of the mode each day as the lubricating oil temperature for that day, thus obtaining the lubricating oil temperature over multiple days.

[0017] As an improvement to the above solution, the step of generating maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the temperature range, and the fault code includes:

[0018] The duration and temperature change trend in each of the aforementioned temperature ranges are obtained based on the multi-day lubricating oil temperature.

[0019] If the duration is less than the normal duration corresponding to the temperature range and the temperature change trend is upward, obtain the fault code and determine whether the lubricating oil cooler is faulty.

[0020] If the problem is not related to the lubricating oil cooler, generate the first maintenance action for the aircraft to be monitored based on the fault code.

[0021] If the oil cooler malfunctions, a second maintenance measure for the aircraft to be monitored will be generated based on the stated temperature range.

[0022] As an improvement to the above solution, if the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, obtaining a fault code and determining whether the lubricating oil cooler is faulty includes:

[0023] If the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, obtain a fault code;

[0024] When the fault code is a device fault code or an oil quantity fault code, it is considered not to be a lubricating oil cooler fault; otherwise, it is considered to be a lubricating oil cooler fault; wherein the device fault code includes a clogged oil filter for the starter generator; and the oil quantity fault code includes low oil quantity.

[0025] As an improvement to the above solution, if it is not a lubricating oil cooler malfunction, the first maintenance measure for the aircraft to be monitored is generated based on the fault code, including:

[0026] When the fault code is a device fault code, a device maintenance strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0027] When the fault code is an oil quantity fault code, an oil quantity control strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0028] As an improvement to the above solution, if the problem is a faulty oil cooler, a second maintenance measure for the aircraft to be monitored is generated based on the alarm temperature range, including:

[0029] If the lubricating oil cooler is faulty, the alarm temperature range in which the lubricating oil temperature over the past few days is located, and the number of days that the alarm temperature range lasts;

[0030] The degree of contamination of the lubricating oil cooler is obtained based on the alarm temperature range.

[0031] Based on the pollution level and duration, a second maintenance measure is generated for the aircraft to be monitored.

[0032] This invention also provides a maintenance system for an aviation lubricating oil cooler, comprising:

[0033] The fleet lubricating oil temperature acquisition module is used to collect QAR data of the fleet aircraft after the ground engines are started and before the APU is shut down, in order to obtain the fleet lubricating oil temperature;

[0034] The alarm temperature range division module is used to generate alarm thresholds based on the lubricating oil temperature of the fleet, resulting in several alarm temperature ranges; each alarm temperature range corresponds to the alarm duration in days and the degree of contamination of the lubricating oil cooler.

[0035] The aircraft data monitoring module is used to acquire QAR data of the aircraft under monitoring and obtain the lubricating oil temperature over multiple days.

[0036] The maintenance measure generation module is used to generate maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the alarm temperature range, and the fault code.

[0037] This invention also provides a maintenance device for an aviation oil cooler, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the maintenance method for the aviation oil cooler as described above.

[0038] This invention also provides a computer-readable storage medium, which includes a stored computer program, wherein the computer program, when running, controls the device where the computer-readable storage medium is located to perform the maintenance method for an aviation lubricating oil cooler as described in any of the above embodiments.

[0039] Compared with existing technologies, this invention discloses a maintenance method, system, equipment, and medium for aviation oil coolers. It obtains the fleet's oil temperature by collecting QAR data from aircraft after engine start-up and before APU shutdown. Based on the oil temperature, alarm thresholds are generated, resulting in several alarm temperature ranges. Each alarm temperature range corresponds to a normal duration and the degree of oil cooler contamination. QAR data of the aircraft to be monitored is acquired to obtain multi-day oil temperatures. Maintenance measures for the monitored aircraft are generated based on the multi-day oil temperatures, the alarm temperature ranges, and fault codes. Using this invention, APU shutdowns due to oil cooler contamination can be reduced, transforming the original "cleaning after shutdown" into "cleaning before shutdown," saving significant labor hours and improving the customer's flight experience. Attached Figure Description

[0040] Figure 1 This is a flowchart illustrating the steps of a maintenance method for an aviation lubricating oil cooler provided in an embodiment of the present invention;

[0041] Figure 2 This is a schematic diagram of the structure of a maintenance system for an aviation lubricating oil cooler provided in an embodiment of the present invention. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description and claims, it should be understood that the terms "first," "second," etc., used in the description and claims are only for the purpose of distinguishing the description of the same technical features, and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated, nor necessarily the order of description or chronological order. The terms are interchangeable where appropriate. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0044] Currently, Boeing 916 aircraft can use the ACMS real-time messaging system to monitor the lubricating oil temperature of the lubricating oil cooler. However, Boeing 816 aircraft lack this monitoring. To achieve lubricating oil cooler cleaning for each configuration, a fixed MRS interval is generally used. For example, the APU lubricating oil cooler is cleaned every 2400 FH, and every 7500 FH, the APU lubricating oil cooler is removed and soaked in a full-concentration cleaning agent TC-100. However, the fixed MRS interval cannot effectively control APU lubricating oil cooler cleaning, and the control measures are not detailed enough to allow for proactive measures. Prolonged high APU lubricating oil temperature leads to accelerated wear of components and accessories, causing other malfunctions and severely affecting the APU's on-wing life. Furthermore, the ACMS monitoring method is a single-point data monitoring, which cannot reflect data change trends.

[0045] Based on the above considerations, this invention provides a maintenance method for an aviation lubricating oil cooler. Please refer to [link to relevant documentation]. Figure 1 In this embodiment, the maintenance method for the aviation lubricating oil cooler is specifically performed through steps S1 to S4:

[0046] S1. Collect QAR data of the fleet's aircraft after the ground engines are started and before the APU is shut down to obtain the fleet's lubricating oil temperature.

[0047] It should be noted that the APU lubricating oil temperature QAR data transmission is mainly divided into two stages. The first stage occurs after the ground engines are started and before the aircraft begins taxiing and shuts down the APU. The second stage occurs after the aircraft lands, from when the crew starts the APU until the engines shut down. In this embodiment of the invention, the data from the first stage is used for analysis, which can effectively monitor the changes in lubricating oil temperature during APU operation.

[0048] S2. An alarm threshold is generated based on the lubricating oil temperature of the fleet, resulting in several alarm temperature ranges; each alarm temperature range corresponds to the number of normal continuous days and the degree of contamination of the lubricating oil cooler.

[0049] It should be noted that in the initial stage of adopting this method, existing ACMS monitoring methods can be used simultaneously. These methods can both verify the results of this implementation and gradually integrate with existing methods to ensure monitoring accuracy. Once a certain amount of fleet lubricating oil temperature data has been accumulated, an application can be made to cancel the inherent cleaning interval of the MRS, changing "cleaning after shutdown" to "cleaning before shutdown," saving significant manual labor time.

[0050] S3. Obtain QAR data of the aircraft to be monitored to obtain the lubricating oil temperature over multiple days.

[0051] It should be noted that ACMS is a single-point data monitoring method, which is difficult to reflect the trend of data changes. In the embodiments of the present invention, QAR data can be used to perform continuous data monitoring, effectively improving the comprehensive monitoring system of APU.

[0052] S4. Based on the multi-day lubricating oil temperature, the alarm temperature range, and the fault code, generate maintenance measures for the aircraft to be monitored.

[0053] In this embodiment of the invention, the variation pattern of lubricating oil temperature over multiple days can be obtained. By further combining the data with fault codes, it is possible to clearly identify whether the increase in lubricating oil temperature is caused by a fault, accurately determine the APU lubricating oil high temperature shutdown fault, avoid the APU operating at high lubricating oil temperature for a long time, and extend the service life of the APU.

[0054] The frequent occurrence of malfunctions in multiple locations and at concentrated times has led to a shortage of spare parts for lubricating oil coolers, resulting in frequent instances of APUs being held up for pending parts. This invention addresses this issue by monitoring the lubricating oil temperature and promptly cleaning the lubricating oil cooler, effectively preventing operational incidents caused by sudden dirt and blockage of the lubricating oil cooler due to external environmental factors. This also effectively alleviates difficulties in aircraft material turnover and facilitates emergency parts retrieval.

[0055] Existing technologies only offer solutions for monitoring the lubricating oil temperature of the oil cooler through the ACMS real-time message system. However, not all aircraft configurations can be monitored using ACMS, resulting in a significant lack of monitoring data for lubricating oil temperature. This invention is the first to propose using QAR data for precise monitoring of aircraft lubricating oil temperature and combining it with fault codes to generate accurate maintenance measures. In application, it can precisely control the cleaning and replacement of lubricating oil cooler components, avoiding more than 90% of APU shutdown events.

[0056] In a preferred embodiment, step S2 involves generating an alarm threshold based on the fleet lubricating oil temperature to obtain several alarm temperature ranges, including:

[0057] Set a contamination level threshold for the lubricating oil cooler;

[0058] Select the lubricating oil temperature corresponding to the contamination level threshold from the lubricating oil temperatures of the fleet as the alarm threshold;

[0059] Based on the alarm threshold, several alarm temperature ranges and the number of normal duration days corresponding to each alarm temperature range are obtained.

[0060] For example, referring to Table 1, the contamination thresholds for the oil cooler are first set to 60%, 80%, and 90%. When the contamination level is no greater than 60%, it is considered that the oil cooler does not need to be cleaned, and its contamination level is not considered in this embodiment of the invention. The contamination level is based on the dirty area of ​​the oil cooler. Then, alarm thresholds of 110℃, 120℃, 130℃, and 149℃ are generated based on the contamination thresholds. Without any cleaning operation and without other malfunctions, the normal continuous duration of the oil cooler at a temperature between 110℃ and 120℃ is 10-15 days, at which time the contamination level of the oil cooler reaches more than 60%; the normal continuous duration of the oil cooler at a temperature between 120℃ and 130℃ is 6-10 days, at which time the contamination level of the oil cooler reaches more than 80%; the normal continuous duration of the oil cooler at a temperature between 130℃ and 149℃ is 3-7 days, at which time the contamination level of the oil cooler reaches more than 90%. Therefore, in this embodiment, the alarm temperature ranges are 110℃ to 120℃, 120℃ to 130℃, and 130℃ to 149℃, and the normal duration of each alarm temperature range is 10-15 days, 6-10 days, and 3-7 days, respectively.

[0061] Understandably, if the lubricating oil temperature of the lubricating oil cooler shows a sudden increase without any operation, it indicates that the lubricating oil cooler may have malfunctioned and needs to be dealt with in time. The higher the level of contamination, the higher the level of cleaning required.

[0062] Table 1

[0063] Temperature interval 90-110(℃) 110-120(℃) 120-130(℃) 130-149(℃) Duration of days 40-50 10-15 6-10 3-7 Degree of contamination \ More than 60% More than 80% More than 90%

[0064] As a preferred implementation, step S3, acquiring the QAR data of the aircraft to be monitored to obtain the multi-day lubricating oil temperature, includes:

[0065] Acquire QAR data of the aircraft under monitoring after the ground engine is started and before the APU is shut down to obtain the real-time lubricating oil temperature at several times over multiple days;

[0066] Calculate the mode of the real-time lubricating oil temperature, and take the maximum value of the mode each day as the lubricating oil temperature for that day, thus obtaining the lubricating oil temperature over multiple days.

[0067] It should be noted that QAR data can be approximated as continuous data, and its sheer volume would require substantial resources to analyze. In this embodiment of the invention, the mode of all real-time lubricating oil temperature data within a day is taken as the lubricating oil temperature for that day, and the aircraft lubricating oil temperature is monitored on a daily basis. In some other preferred embodiments, the lubricating oil temperature can also be monitored on a per-flight basis.

[0068] In some preferred embodiments, step S4, generating maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the temperature range, and the fault code, includes:

[0069] The duration and temperature change trend in each of the aforementioned temperature ranges are obtained based on the multi-day lubricating oil temperature.

[0070] If the duration is less than the normal duration corresponding to the temperature range and the temperature change trend is upward, obtain the fault code and determine whether the lubricating oil cooler is faulty.

[0071] If the problem is not related to the lubricating oil cooler, generate the first maintenance action for the aircraft to be monitored based on the fault code.

[0072] If the oil cooler malfunctions, a second maintenance measure for the aircraft to be monitored will be generated based on the stated temperature range.

[0073] It should be noted that an abnormal rise in lubricating oil temperature may be due to the need for cleaning and maintenance of the lubricating oil cooler, or it may be due to other faults, such as a clogged oil filter in the starter generator, too low lubricating oil volume, or a faulty temperature sensor, or it may be due to abnormalities in nearby pipelines.

[0074] In this embodiment of the invention, by combining the data change pattern with the APU fault code, it is possible to clearly identify whether the increase in lubricating oil temperature is caused by a fault, accurately determine the APU lubricating oil high temperature shutdown fault, avoid the APU from running at high lubricating oil temperature for a long time, and extend the service life of the APU.

[0075] Further, preferably, the step of obtaining a fault code and determining whether the oil cooler is faulty if the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward includes:

[0076] If the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, obtain a fault code;

[0077] When the fault code is a device fault code or an oil quantity fault code, it is considered not to be a lubricating oil cooler fault; otherwise, it is considered to be a lubricating oil cooler fault; wherein the device fault code includes a clogged oil filter for the starter generator; and the oil quantity fault code includes low oil quantity.

[0078] As a preferred embodiment, if the problem is not a lubricating oil cooler malfunction, the first maintenance measure for the aircraft to be monitored is generated based on the fault code, including:

[0079] When the fault code is a device fault code, a device maintenance strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0080] When the fault code is an oil quantity fault code, an oil quantity control strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0081] For example, when the fault code is 49-94299, it may be due to a clogged starter / generator oil filter causing an increase in lubricating oil temperature. The first maintenance measure is to remove and inspect the oil filter; cleaning or replacing the oil cooler is not required. When the fault code is 49-91227, it may be due to insufficient lubricating oil causing an increase in lubricating oil temperature. The first maintenance measure is to add lubricating oil; again, cleaning or replacing the oil cooler is not required. However, when the fault code is 49-91005, indicating a high lubricating oil temperature shutdown fault, the sudden increase in lubricating oil temperature may be caused by other reasons. In addition to cleaning or replacing the oil cooler, further inspection and confirmation are needed, such as checking the temperature sensor and the condition of nearby pipelines.

[0082] In a preferred embodiment, if the problem is a lubricating oil cooler malfunction, a second maintenance measure for the aircraft under monitoring is generated based on the alarm temperature range, including:

[0083] If the lubricating oil cooler is faulty, the alarm temperature range in which the lubricating oil temperature over the past few days is located, and the number of days that the alarm temperature range lasts;

[0084] The degree of contamination of the lubricating oil cooler is obtained based on the alarm temperature range.

[0085] Based on the pollution level and duration, a second maintenance measure is generated for the aircraft to be monitored.

[0086] Understandably, the alarm temperature range can reflect the degree of contamination of the oil cooler, thereby determining whether the oil cooler needs to be cleaned or replaced; and the duration of the alarm temperature range can reflect the urgency of maintenance.

[0087] For example, when the lubricating oil temperature is in the first alarm temperature range, low-level maintenance measures are used. However, if the duration of the lubricating oil temperature in the first alarm temperature range is less than 10 days and the lubricating oil temperature rises to the second alarm range, the low-level maintenance measures are upgraded to medium-level maintenance measures.

[0088] In some preferred embodiments, the second maintenance measure may also be generated in conjunction with the ambient temperature.

[0089] For example, as shown in Table 2, when the lubricating oil temperature is between 90-100°C, the lubricating oil temperature is continuously monitored; when the lubricating oil temperature is between 100-120°C, if the ambient temperature is greater than 30°C, the second maintenance measure includes cleaning the lubricating oil cooler within 7 days; if the ambient temperature is less than 30°C, the second maintenance measure includes cleaning the lubricating oil cooler in conjunction with scheduled maintenance; when the lubricating oil temperature is between 120-130°C, if the ambient temperature is greater than 30°C, the second maintenance measure includes cleaning the lubricating oil / replacing the cooler within 3 days; if the ambient temperature is less than 30°C, the second maintenance measure includes cleaning the lubricating oil cooler within 7 days; when the lubricating oil temperature is between 130-148°C, if the ambient temperature is greater than 30°C, the second maintenance measure includes cleaning / replacing the lubricating oil cooler after the same day's flight; if the ambient temperature is less than 30°C, the second maintenance measure includes cleaning the lubricating oil / replacing the cooler within 3 days.

[0090] Table 2

[0091]

[0092] The maintenance method for an aircraft oil cooler provided by this invention uses QAR data to accurately monitor the aircraft oil temperature and generates accurate maintenance measures in conjunction with fault codes. This can reduce APU shutdown events caused by oil cooler contamination, transforming the original "cleaning after shutdown" into "cleaning before shutdown", saving a lot of manpower and improving the customer's flight experience.

[0093] This invention provides a maintenance system for an aircraft lubricating oil cooler. Please refer to [link / reference]. Figure 2 The maintenance system for the aviation lubricating oil cooler includes a fleet lubricating oil temperature acquisition module 11, an alarm temperature range division module 12, an aircraft data monitoring module 13, and a maintenance measure generation module 14, wherein:

[0094] The fleet lubricating oil temperature acquisition module 11 is used to collect QAR data of the fleet aircraft after the ground engine is started and before the APU is shut down, and to obtain the fleet lubricating oil temperature.

[0095] The alarm temperature range division module 12 is used to generate an alarm threshold based on the lubricating oil temperature of the fleet, and obtain several alarm temperature ranges; each alarm temperature range corresponds to the alarm duration in days and the degree of contamination of the lubricating oil cooler.

[0096] The aircraft data monitoring module 13 is used to acquire the QAR data of the aircraft to be monitored and obtain the lubricating oil temperature over multiple days.

[0097] The maintenance measure generation module 14 is used to generate maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the alarm temperature range, and the fault code.

[0098] In a preferred embodiment, the alarm temperature range division module 12 includes:

[0099] The contamination level threshold setting unit is used to set the contamination level threshold of the lubricating oil cooler;

[0100] An alarm threshold generation unit is used to select, from the lubricating oil temperatures of the fleet, the lubricating oil temperature corresponding to the contamination level threshold, as the alarm threshold.

[0101] The interval division unit is used to obtain several alarm temperature intervals and the number of normal duration days corresponding to each alarm temperature interval based on the alarm threshold.

[0102] In a preferred embodiment, the aircraft data monitoring module 13 includes:

[0103] The real-time lubricating oil temperature acquisition unit is used to acquire QAR data of the aircraft under monitoring after the ground engine is started and before the APU is shut down, so as to obtain the real-time lubricating oil temperature at several times over multiple days.

[0104] The multi-day lubricating oil temperature calculation unit is used to calculate the mode of the real-time lubricating oil temperature, and take the maximum value of the mode each day as the lubricating oil temperature of that day to obtain the multi-day lubricating oil temperature.

[0105] In a preferred embodiment, the maintenance measure generation module 14 includes:

[0106] The temperature trend analysis unit is used to obtain the duration and temperature change trend in each of the multi-day lubricating oil temperature ranges.

[0107] The fault determination unit is used to obtain a fault code and determine whether the lubricating oil cooler is faulty if the duration is less than the normal duration corresponding to the temperature range and the temperature change trend is upward.

[0108] The first maintenance measure generation unit is used to generate the first maintenance measure for the aircraft to be monitored based on the fault code, unless the lubricating oil cooler is faulty.

[0109] The second maintenance measure generation unit is used to generate a second maintenance measure for the aircraft to be monitored based on the temperature range if the lubricating oil cooler fails.

[0110] Further, preferably, the fault determination unit is specifically used for:

[0111] If the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, obtain a fault code;

[0112] When the fault code is a device fault code or an oil quantity fault code, it is considered not to be a lubricating oil cooler fault; otherwise, it is considered to be a lubricating oil cooler fault; wherein the device fault code includes a clogged oil filter for the starter generator; and the oil quantity fault code includes low oil quantity.

[0113] Preferably, the first maintenance measure generation unit is specifically used for:

[0114] When the fault code is a device fault code, a device maintenance strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0115] When the fault code is an oil quantity fault code, an oil quantity control strategy is generated as the first maintenance measure for the aircraft to be monitored.

[0116] In a preferred embodiment, the second maintenance measure generation unit is specifically used for:

[0117] If the lubricating oil cooler is faulty, the alarm temperature range in which the lubricating oil temperature over the past few days is located, and the number of days that the alarm temperature range lasts;

[0118] The degree of contamination of the lubricating oil cooler is obtained based on the alarm temperature range.

[0119] Based on the pollution level and duration, a second maintenance measure is generated for the aircraft to be monitored.

[0120] The maintenance system for an aircraft oil cooler provided by this invention uses QAR data to accurately monitor the aircraft oil temperature and generates accurate maintenance measures in conjunction with fault codes. This can reduce APU shutdown events caused by oil cooler contamination, transforming the original "cleaning after shutdown" into "cleaning before shutdown", saving a lot of manpower and improving the customer's flight experience.

[0121] This invention also provides a maintenance device for an aviation oil cooler, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the maintenance method for an aviation oil cooler as described above. The working principles and beneficial effects of the two are one-to-one, so they will not be described in detail here.

[0122] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0123] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A maintenance method for an aviation lubricating oil cooler, characterized in that, include: The fleet's lubricating oil temperature was obtained by collecting QAR data from the aircraft after the ground engines were started and before the APU was shut down. Based on the lubricating oil temperature of the fleet, an alarm threshold is generated, resulting in several alarm temperature ranges; each alarm temperature range corresponds to the number of normal continuous days and the degree of contamination of the lubricating oil cooler. Obtain QAR data of the aircraft to be monitored to obtain the lubricating oil temperature over multiple days; Based on the multi-day lubricating oil temperature, the alarm temperature range, and the fault code, maintenance measures for the aircraft to be monitored are generated. The acquisition of QAR data of the aircraft under monitoring to obtain multi-day lubricating oil temperatures includes: Acquire QAR data of the aircraft under monitoring after the ground engine is started and before the APU is shut down to obtain the real-time lubricating oil temperature at several times over multiple days; Calculate the mode of the real-time lubricating oil temperature, and take the maximum value of the mode for each day as the lubricating oil temperature for that day to obtain the lubricating oil temperature over multiple days. The step of generating maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the temperature range, and the fault code includes: The duration and temperature change trend in each of the aforementioned temperature ranges are obtained based on the multi-day lubricating oil temperature. If the duration is less than the normal duration corresponding to the temperature range and the temperature change trend is upward, obtain the fault code and determine whether the lubricating oil cooler is faulty. If the problem is not related to the lubricating oil cooler, generate the first maintenance action for the aircraft to be monitored based on the fault code. If the oil cooler malfunctions, a second maintenance measure for the aircraft to be monitored will be generated based on the stated temperature range.

2. The maintenance method for an aviation lubricating oil cooler as described in claim 1, characterized in that, The alarm threshold is generated based on the lubricating oil temperature of the fleet, resulting in several alarm temperature ranges, including: Set a contamination level threshold for the lubricating oil cooler; Select the lubricating oil temperature corresponding to the contamination level threshold from the lubricating oil temperatures of the fleet as the alarm threshold; Based on the alarm threshold, several alarm temperature ranges and the number of normal duration days corresponding to each alarm temperature range are obtained.

3. The maintenance method for an aviation lubricating oil cooler as described in claim 1, characterized in that, If the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, a fault code is obtained to determine whether the oil cooler is faulty, including: If the duration is less than the normal duration range corresponding to the temperature range and the temperature change trend is upward, obtain a fault code; When the fault code is a device fault code or an oil quantity fault code, it is considered not to be a lubricating oil cooler fault; otherwise, it is considered to be a lubricating oil cooler fault; wherein the device fault code includes a clogged oil filter for the starter generator; and the oil quantity fault code includes low oil quantity.

4. The maintenance method for an aviation lubricating oil cooler as described in claim 1, characterized in that, If the problem is not a lubricating oil cooler malfunction, the first maintenance procedure for the aircraft to be monitored is generated based on the fault code, including: When the fault code is a device fault code, a device maintenance strategy is generated as the first maintenance measure for the aircraft to be monitored. When the fault code is an oil quantity fault code, an oil quantity control strategy is generated as the first maintenance measure for the aircraft to be monitored.

5. A maintenance method for an aviation lubricating oil cooler as described in claim 1, characterized in that, If the problem is a faulty oil cooler, a second maintenance measure for the aircraft under monitoring is generated based on the alarm temperature range, including: If the lubricating oil cooler is faulty, the alarm temperature range in which the lubricating oil temperature over the past few days is located, and the number of days that the alarm temperature range lasts; The degree of contamination of the lubricating oil cooler is obtained based on the alarm temperature range. Based on the pollution level and duration, a second maintenance measure is generated for the aircraft to be monitored.

6. A maintenance system for an aircraft lubricating oil cooler, characterized in that, The maintenance system for the aviation oil cooler is applied in the maintenance method for the aviation oil cooler as described in any one of claims 1-5, and the maintenance system for the aviation oil cooler includes: The fleet lubricating oil temperature acquisition module is used to collect QAR data of the fleet aircraft after the ground engines are started and before the APU is shut down, in order to obtain the fleet lubricating oil temperature; The alarm temperature range division module is used to generate alarm thresholds based on the lubricating oil temperature of the fleet, resulting in several alarm temperature ranges; each alarm temperature range corresponds to the alarm duration in days and the degree of contamination of the lubricating oil cooler. The aircraft data monitoring module is used to acquire QAR data of the aircraft under monitoring and obtain the lubricating oil temperature over multiple days. The maintenance measure generation module is used to generate maintenance measures for the aircraft to be monitored based on the multi-day lubricating oil temperature, the alarm temperature range, and the fault code.

7. A maintenance device for an aviation lubricating oil cooler, characterized in that, It includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement the maintenance method for an aviation oil cooler as described in any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device on which the computer-readable storage medium is located to perform the maintenance method for an aviation oil cooler as described in any one of claims 1 to 5.

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