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Research for Civil Aircraft Proposed Master Minimum Equipment List (PMMEL) Items Analysis Method Based on System Safety Assessment

Master Minimum Equipment List (MMEL) is an important tool for balancing aircraft economy and safety. Civil aircraft manufacturers issue the MMEL by submitting a Proposed Master Minimum Equipment List (PMMEL), which is reviewed by the Authority. PMMEL analysis process and the determination of its final item list play a key role in improving the operational reliability of civil aircraft. This paper investigates the PMMEL item analysis method based on system safety assessment, including qualitative and quantitative safety analysis methods, and proposes an analysis template, which is applied to specific type and demonstrates the reasonableness and effectiveness of the method. The method can enhance the scope of PMMEL item determination and improve the level of aircraft economy while ensuring the safe operation of the aircraft.