What could indicate a gear that cannot extend or lock in flight?

• A. Engine failure.
• B. Gear may remain in transit; warnings or lights indicate a fault; audible gear warning may occur.
• C. Flaps extended.
• D. Aircraft climbs rapidly.

Answer: (B)

When a gear cannot extend or lock, the cockpit warning system and indicators are your primary clues. The gear may stay in transit, meaning it hasn’t completed its motion to the down-and-locked position. At the same time, a fault warning light on the gear panel will illuminate, and there may be an audible gear warning. These signals together point to a problem with extending or locking the gear, prompting the crew to follow abnormal or alternate-extension procedures.

The other scenarios don’t directly indicate a gear extension fault: engine failure doesn’t tell you about the gear status; flaps being extended isn’t related to gear extension or locking; and a rapid climb doesn’t specifically signal a gear fault.