What is alternate (manual) landing gear extension, and when would it be used?

• A. A backup electrical system for gear operation; used when main power is available.
• B. A manual gear extension mechanism used when hydraulics fail to extend gear; used to safely extend gear and lock it down in flight or on the ground.
• C. A cosmetic cover to simulate gear extension.
• D. A radio remote control feature.

Answer: (B)

Alternate (manual) landing gear extension is a backup method that lets you lower and lock the landing gear without relying on the normal hydraulic system. When the hydraulic pump or its power source fails, you can’t extend the gear in the usual way. The alternate extension provides a separate path, often using a hand crank or a dedicated manual mechanism, to physically move the gear to the down position and ensure it is locked. This guarantees a safe landing option even with hydraulics failed, whether you’re still in flight or on the ground. It is specifically for extending and locking the gear, not a cosmetic feature or a remote control.