Reliability (Aviation) – Reliability in aviation is a broad term and is an expression of dependability and the probability that an item—including an aircraft, engine, propeller, or component—will perform the required function under specified conditions without failure for a specified period of time.
Testing for effectiveness of an Airline Reliability Program consists of collecting and analyzing operational performance data such as:
- Maintenance-related delays and cancellations;
- Failure rates of parts and components after they are approved for return to service;
- Discrepancy rates of aircraft after heavy maintenance; and
- Related trend analysis.
Source: FAA AC 120-79
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