FAA Aviation Mechanic General (AMG)Ground Operations and ServicingMedium
An aircraft is being jacked in a maintenance hangar for landing gear retraction tests. Before raising the aircraft, the technician must verify which condition to ensure a safe jacking operation?
- AThe aircraft is loaded to maximum gross weight to stabilize it on the jacks
- BThe hangar doors are open to allow ventilation during the procedure
- CThe aircraft is level both laterally and longitudinally and jacks are on a solid, level surface
- DFuel tanks are completely full to prevent the aircraft from tipping
Show answer & explanationAnswer & explanation
Correct answer: C. The aircraft is level both laterally and longitudinally and jacks are on a solid, level surface
Before jacking, the aircraft must be leveled longitudinally and laterally using a leveling device, and the jacks must sit on a solid, level surface to prevent tipping or damage. Fuel load and gross weight are not jacking prerequisites and can actually create hazards if not per the maintenance manual's specified configuration.
Why the other options are wrong
- A. Maximum gross weight is unrelated and could exceed jack rated capacity.
- B. Ventilation is not a jacking safety requirement.
- D. Full fuel changes weight distribution and is not a standard jacking requirement.
Aircraft Jacking Safety
Procedure requiring the aircraft to be leveled and jacks placed on solid, level surfaces before lifting to prevent instability.
- Use leveling device on longitudinal and lateral axes
- Jacks must be rated for aircraft weight and placed at designated jack points
- Never work under a jacked aircraft without additional support (safety stands)
Memory trick: Level it, lock it, lift it safely.