Definition
A document that describes the specific maintenance actions an operator must perform when an item of equipment is inoperative on an aircraft being dispatched under a Minimum Equipment List (MEL). The MPM works alongside the MEL: where the MEL identifies what may be inoperative and under what operational conditions, the MPM tells maintenance personnel exactly how to deactivate, secure, placard, or otherwise handle that item before flight.
Plain English
A manual that gives maintenance staff step-by-step instructions for safely handling broken equipment so the aircraft can still legally fly under MEL rules.
Context Anchor
Seen when using a Minimum Equipment List to decide whether an airplane can legally and safely be flown with a specific item not working.
Why Pilots Care
Pilots rely on the MEL to decide whether an aircraft can be dispatched with an inoperative item, but the MEL only works if the maintenance side of the procedure has actually been completed. The MPM is what makes that happen — it ensures the inoperative item is properly deactivated and placarded before the pilot ever signs for the aircraft.
Intuition Check
The MPM is not the permission list. The Minimum Equipment List says whether flight may be allowed; the MPM says what maintenance steps must be done first.
Example Sentence 1
Before releasing the aircraft with the inoperative landing light, the mechanic followed the MPM to deactivate the circuit and placard the switch.
Example Sentence 2
All maintenance actions must be completed in accordance with the procedures contained in the approved MPM.