Who publishes the specific procedures for an engine inspection?

• A. For routine maintenance the engine manufacturer; for overhaul maintenance the airframe manufacturer
• B. For routine maintenance the airframe manufacturer; for overhaul maintenance the engine manufacturer
• C. The airline operator
• D. The maintenance technician

Answer: (B)

Who publishes engine inspection procedures depends on the scope of the work. For routine maintenance, the airframe manufacturer provides the procedures because these inspections are part of the aircraft’s overall maintenance program and must be coordinated with the airframe systems and the aircraft’s operating limits. When an engine is overhauled, the procedures must reflect the engine’s specific design and tolerances, so the engine manufacturer publishes the overhaul manual with the exact inspection criteria, disassembly/assembly steps, and required tools. The airline operator and the maintenance technician don’t publish these procedures themselves; they implement them by following the manuals from the appropriate manufacturer.