Which items are commonly inspected during routine landing gear door maintenance?

• A. Hinges and latches, door alignment, actuators, seals, lubrication.
• B. Exterior paint work.
• C. Passenger cabin articles.
• D. Fuel lines.

Answer: (A)

Routine landing gear door maintenance focuses on the door mechanism and its sealing system. The items that are commonly inspected—hinges and latches—ensure the door moves smoothly and locks securely in both the extended and retracted positions. Door alignment is checked so the door sits correctly against its rub strip and seals properly when closed, preventing gaps that could allow debris ingress or hydraulic fluid leakage. Actuators are inspected to verify reliable door movement and positioning, while seals are examined for wear or damage to maintain a clean, sealed gear bay. Lubrication is applied to moving parts to reduce wear and ensure reliable operation over time.

Exterior paint work is cosmetic and doesn’t affect door function or sealing, so it isn’t a focus of routine gear door maintenance. Passenger cabin articles are unrelated to the gear door system, and fuel lines belong to the aircraft’s fuel system rather than the door mechanism, so they aren’t part of standard door maintenance.