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A Calculation Method of Civil Aircraft System Maintenance Time Interval

A technology of maintenance time and civil aircraft, which is applied in the aviation field and can solve the problems of high maintenance costs, loss of profits, and insufficient maintenance of airlines

Inactive Publication Date: 2017-02-15
AVIC SAC COMML AIRCRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the industry practice for this task time interval is 800-1000FH, and this time interval appears to be insufficient maintenance, which may cause higher maintenance costs or loss of profits to airlines

Method used

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  • A Calculation Method of Civil Aircraft System Maintenance Time Interval
  • A Calculation Method of Civil Aircraft System Maintenance Time Interval
  • A Calculation Method of Civil Aircraft System Maintenance Time Interval

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Example 1: In this example, the application test of the CRJ700 emergency light system of an in-service aircraft is carried out. The specific steps are as follows:

[0079] Step 1: Prepare Data

[0080] Including the name of important maintenance items, component names, maintenance task description, task category, safety level, mean time between failures, additional failure mean time between failures, loss factor, - task cost and failure cost, where the task category is the Common sense in the field, category 5 is explicit safety category, category 6 is explicit operation category, category 7 is explicit economic category, category 8 is implicit security category, and category 9 is implicit non-safety category. For details, please refer to MSG -3, 2009.1. The main failure mean time between failures, the additional failure mean time between failures, and the loss factor are all determined according to different component types, and they are all fixed values.

[0081] MS...

Embodiment 2

[0143] Embodiment 2: In this example, the present invention is applied to the CSeries emergency light system of Bombardier's newly developed aircraft, and data such as CSeries direct maintenance cost analysis, maintainability analysis, and reliability analysis are used as input. Its calculation method is the same as that of Embodiment 1, the difference lies in that the specific parameter settings are different.

[0144] MSI (Maintenance Important Item): emergency light system;

[0145] Selected components: emergency lights and signs;

[0146] Task description: Operational inspection of emergency light system;

[0147] Task category: 8;

[0148] Security level: Injury;

[0149] MTBF: 103018FH,

[0150] Additional invalidation: 1.0E+5;

[0151] Loss factor β: 1.0;

[0152] Task cost:

[0153] ●GSE:0;

[0154] ●Manpower working hours: 0.15 hours

[0155] ●Materials / consumables: 0

[0156] ●Number of executives: 1

[0157] invalidation fee

[0158] ...

Embodiment 3

[0175] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the task category is the sixth category of the dominant category

[0176] E.g:

[0177] MSI (maintenance important item): CRJ elevator;

[0178] Selected parts: Elevator control cables;

[0179] Task description: Functional inspection of elevator control cables;

[0180] Task category: 6;

[0181] Security level: other;

[0182] MTBF: 30000;

[0183] Additional failure: not applicable;

[0184] Loss factor β: 2.2;

[0185] Task cost:

[0186] ●GSE:0;

[0187] ●Manpower working hours: 4 hours

[0188] ●Materials / consumables: 0

[0189] ●Number of executives: 1

[0190] invalidation fee

[0191] ●Repair cost: 500$

[0192] ●Working hours: 3 hours

[0193] ●Flight delay: No;

[0194] ●Flight cancellation: a loss of 30,000$;

[0195] ●Turn to fly: No;

[0196] ●Time interval adjustment value: 5000

[0197] ●Materials / Consumables: 0;

[0198] ●Number of days of ...

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Abstract

The invention discloses a civil aircraft system maintenance time interval calculating method, and belongs to the technical field of aviation. Economy (expenses per hour) is selected as the optimization target. For safety tasks, two methods are used for calculating the time interval of corresponding maintenance tasks, particular emphasis is placed on safety and economy, and the time interval of the tasks is determined after the economy algorithm recommend range, the safety threshold and the product type regular checking target value are comprehensively considered. With economy as the center, safety as the limit and reliability as the input concept, the reasonable maintenance time interval is recommended. When a decision is made in a working group, the optimal maintenance time interval is judged after the supplier recommend value, engineering judgment value, historical maintenance data, similar system part data, industry experience value, invention recommend value and the like are comprehensively considered. The problem that in the MRBR setting process of a domestic civil aircraft, due to the lack of lots of service data, the maintenance time interval of the system part can not be accurately judged is solved.

Description

technical field [0001] The invention belongs to the field of aviation technology, in particular to a method for calculating maintenance time intervals of civil aircraft systems. Background technique [0002] In the traditional "system analysis" process of civil aircraft, the determination of maintenance time intervals is conservative, and the selection of each working group is often based on industry practices. Most of the industry practices are based on the supplier's recommended value, service data of the same or similar parts, engineering experience, etc., which are often only aimed at a certain system or component itself, and are not completely consistent with the aircraft MSG-3 (MaintenanceSteering Group—3rd Task Force) thinking Convergence, that is, it does not consider its rationality from the perspective of the entire aircraft: what kind of impact the failure of the system will have on the aircraft; under various impacts, when will the maintenance cost be the lowest,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 王勇徐志锋蒋庆喜王莹刘余
Owner AVIC SAC COMML AIRCRAFT
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