All the terms you need to know when you’re trying to understand document management.
An MEL, or Minimum Equipment List, is a vital document that specifies which aircraft instruments, equipment, or systems may be inoperative under specific conditions while still allowing the aircraft to be considered airworthy.
Each MEL is operator-specific and approved by the relevant aviation authority (such as EASA, FAA, or CASA) based on the aircraft’s Master Minimum Equipment List (MMEL) provided by the manufacturer. The MEL outlines:
What can be inoperative
Under what conditions
For how long
Any required procedures or limitations
The MEL ensures safety while offering operational flexibility, particularly when dealing with minor equipment failures that don’t compromise the overall safety of the flight.
In digital document management systems like Web Manuals, MELs can be managed more efficiently with features such as automated revision tracking, smart compliance linking, and real-time distribution to flight crews. This reduces administrative workload and ensures that all personnel always have access to the latest approved version.
In short, the MEL is a cornerstone of operational decision-making, helping operators maintain compliance while minimizing disruptions to service.
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