FAA Commercial Pilot Airplane (CAX)Aircraft SystemsHard
During landing gear extension, a pilot places the gear selector down but the cockpit indicator shows a red/unsafe light instead of three green lights. This indication most likely means:
- Athe landing gear is fully retracted and locked
- Bat least one landing gear leg is not down and locked (in transit or unsafe)
- Cthe cabin pressurization system has failed
- Dthe constant-speed propeller governor is malfunctioning
Show answer & explanationAnswer & explanation
Correct answer: B. at least one landing gear leg is not down and locked (in transit or unsafe)
A red or amber unsafe indicator light illuminates when a gear position switch senses that a gear leg is not fully extended and locked, alerting the pilot to a potential unsafe landing gear condition requiring troubleshooting or use of emergency extension procedures.
Why the other options are wrong
- A. Full retraction would typically be shown by a different indication (gear up light), not an unsafe red light during extension.
- C. Pressurization failures are unrelated to landing gear position indicators.
- D. Propeller governor issues have no connection to gear position indication.
Gear Unsafe/In-Transit Indicator
A cockpit warning light (often red) that illuminates when a landing gear leg is not confirmed down and locked, distinct from the green safe indication.
- Green lights confirm gear down and locked
- Red/amber indicates unsafe or in-transit gear
- Pilots should follow emergency extension checklists if unsafe indication persists
Memory trick: Green means go-down-safe, red means recheck.