In routine maintenance, who publishes engine inspection procedures?

• A. Airframe manufacturer
• B. Engine manufacturer
• C. Airline operator
• D. Independent inspector

Answer: (A)

Routine maintenance inspection procedures for an engine that is installed on an aircraft come from the airframe manufacturer. The Airframe Maintenance Manual provides the official, standardized steps for inspecting the engine as part of the integrated aircraft system, ensuring the procedures align with how the engine interfaces with the airframe and with access, mounting, and safety considerations. The engine manufacturer does publish engine-specific maintenance data, but for routine inspections tied to the installed aircraft, the AMM from the airframe maker is the definitive reference. The airline operator uses that manual, and independent inspectors don’t publish official procedures.