What is the purpose of the DN LOCK RLS button on the landing gear lever?

• A. Manually releases the landing gear lever lock if the gear won't retract on takeoff, and terrain is imminent
• B. Locks the landing gear lever to prevent inadvertent retraction when weight-on-wheels
• C. Activates a warning light for landing gear not retracted in flight
• D. Simultaneously retracts both main gears on landing

Answer: (A)

The DN LOCK RLS button serves as a manual release for the downlock mechanism on the landing gear. When the gear is lowered, a downlock keeps it securely in the extended position and prevents unintended retraction. If the gear will not retract during takeoff and terrain is imminent, this button provides a manual override to release that lock, allowing the gear to come up again so you can complete the retraction sequence.

This is why it’s the best answer: it describes a deliberate, manual action to unlock the gear’s downlock so retraction can proceed in a critical situation. The other options describe actions that aren’t what this button does—locking the lever, triggering a warning light, or retracting gears automatically—whereas the DN LOCK RLS is specifically about releasing the downlock to enable retraction.