ETOPS IFSD Risk Calculator for Dual Engine Safety
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Solution Overview
Problem
Current regulations for twin-engine aircraft ETOPS (Extended Operations) rely on conservative and inflexible risk calculation equations that overestimate the risk of dual independent engine shutdowns, leading to unnecessary restrictions on flight routes and fuel consumption.
Innovation Solution
An ETOPS IFSD risk calculator system that uses an event-sequence analysis probabilistic model to calculate the risk of dual independent engine shutdowns for each phase of flight, allowing for more accurate and adaptable risk assessment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conservative risk calculation equations are used for ETOPS operations, then safety is ensured, but flight routes are unnecessarily restricted and fuel consumption increases
Solution Approach 1:
The patent changes the fundamental parameters of risk calculation by transitioning from deterministic conservative equations to probabilistic models that incorporate multiple variables such as engine failure rates, maintenance quality, and operational conditions. This allows for more accurate risk assessment that reflects actual operational safety while enabling more efficient flight routes and reduced fuel consumption.
Solution Approach 2:
The invention introduces dynamic and adaptable risk assessment that can adjust to different operational contexts, aircraft types, and maintenance programs. Rather than applying static conservative factors to all operations, the system dynamically calculates risk based on specific conditions, allowing operators to demonstrate safety for specific routes and aircraft configurations, thereby reducing unnecessary fuel consumption from detours.
2Reliability
If conservative risk calculation equations are used for ETOPS operations, then safety is ensured, but flight routes are unnecessarily restricted
Solution Approach 1:
The patent transforms the rigid parameter-based conservative equations into flexible probabilistic models that can accommodate various flight routes, aircraft types, and operational conditions. This enables regulators and operators to assess safety on a case-by-case basis, granting approval for specific routes that meet demonstrated safety standards rather than applying blanket restrictions.
Solution Approach 2:
The invention segments the risk assessment process into distinct phases (climb, cruise, descent, landing) and considers different risk factors for each phase. This segmented approach allows for more nuanced evaluation of specific route characteristics and operational conditions, enabling greater flight route flexibility while maintaining safety through phase-specific risk management.
3Reliability
If conservative risk calculation equations are used, then safety is ensured, but the focus is incorrectly placed on dual independent engine shutdowns
Solution Approach 1:
The patent segments the risk assessment into multiple independent components including engine failure, maintenance quality, operational procedures, and environmental factors. This segmentation reveals that dual independent engine shutdown is only one of many risk drivers, allowing for a more comprehensive understanding and targeted mitigation of actual risk sources rather than focusing disproportionately on engine failures.
Solution Approach 2:
The probabilistic model incorporates feedback loops that continuously assess and update risk based on actual operational data, maintenance records, and incident reports. This feedback mechanism provides deeper insight into the actual drivers of risk in specific operational contexts, enabling more informed safety decisions and route approvals.
Data Source
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AI summary
A system and method for analyzing a risk of extended operations (ETOPS) dual independent engine in-flight shutdown (IFSD) using an ETOPS IFSD risk calculation means is disclosed. A two-engine aircraft/engine combination performance data set is provided to obtain flight specific data, and a user input variable array is also provided. Flight times are calculated based on the flight specific data and the user input variable array. Dual independent engine shutdown total thrust loss probability values for various phases of an ETOPS flight are calculated based on the user input variable array, the flight specific data, and the flight times. A calculated risk of dual independent engine in-flight shutdown on the ETOPS flight is calculated based on a sum of the dual independent engine shutdown total thrust loss probability values.