Which items are typically included in common maintenance checks for landing gear doors?

• A. Inspect hinges and latches, verify door alignment, check actuators, seals, and lubrication.
• B. Replace doors every 100 flight hours.
• C. Paint the doors every month.
• D. Check fuel system.

Answer: (A)

Maintenance checks for landing gear doors focus on ensuring reliable operation during retraction and extension, plus preventing leaks and contamination. Inspecting hinges and latches ensures the door can open and close securely without binding or looseness that could lead to door failure. Verifying door alignment is essential so the door sits correctly against the fuselage and wheel well, avoiding gaps, rubbing, or improper closure that could cause drag or structural damage. Checking actuators confirms the door mechanism has the right travel, force, and no hydraulic or electrical leakage. Seals must be intact to keep out debris and moisture and to maintain proper sealing around the door, while lubrication reduces wear and prevents binding of moving parts like hinges, latches, and actuators. Together, these items cover the functional, structural, and sealing aspects that keep landing gear doors operating safely and reliably.

Other options don’t fit because they address tasks outside the door system or reflect impractical maintenance intervals. Replacing doors every 100 flight hours isn’t a standard practice, painting the doors monthly is purely cosmetic, and checking the fuel system is not part of routine landing gear door maintenance.