Direct work on aircraft is referred to as what term?

• A. On-equipment
• B. Off-equipment
• C. In-flight
• D. In-shop

Answer: (A)

Direct work on the aircraft means maintenance performed while the airplane remains in place and the airframe is being serviced directly, without removing it from its mounted configuration. This is the on-equipment approach: you’re working on the aircraft itself and its installed systems. It contrasts with off-equipment, where components are removed from the aircraft and worked on separately, such as in a bench or shop setting. In-flight work would occur during flight, which isn’t typical for scheduled maintenance, and in-shop work happens away from the aircraft, usually on removed parts. Because the scenario describes performing tasks directly on the aircraft itself, the term on-equipment is the best fit.