MEL Repair Category in Part 91 Operations

I was recently schooled by a maintenance director at a 91/GA operator based here in the US. MEL (D195), repair category’s A,B,C,D do not apply, only provisos such as “Before Next Flight…” must be adhered to. IF: a prolonged time has passed, maintenance must produce a review of the deferred item and ensure the continued compliance.

The reference for this is FAA Order 8900.1, Volume 4, Chapter 3, Section 2, Paragraphs 4-647 and 4-648. This is further defined in MMEL Policy Letter #025, item #24.