Which components provide on-ground indications for gear status?

Which components provide on-ground indications for gear status?

• A. Nose gear squat switch and main gear proximity switches
• B. Nose gear height sensor
• C. Main gear differential pressure sensors
• D. Pilot's visual indicators only

Answer: (A)

On-ground gear status is shown by sensors that confirm both contact with the ground and the gear’s position. The nose gear squat switch provides a signal when weight is on the nose gear, indicating the aircraft is on the ground. The main gear proximity switches sense the main gear’s position to confirm that the gear is down and locked. Together, these provide clear, automatic on-ground indications to the crew and systems. Other options don’t give this direct, reliable ground-status information: a nose gear height sensor isn’t a standard indicator of gear state, main gear differential pressure sensors reflect hydraulic pressure rather than gear position, and relying on pilot visual indicators alone lacks automatic verification and redundancy.

On-ground gear status is shown by sensors that confirm both contact with the ground and the gear’s position. The nose gear squat switch provides a signal when weight is on the nose gear, indicating the aircraft is on the ground. The main gear proximity switches sense the main gear’s position to confirm that the gear is down and locked. Together, these provide clear, automatic on-ground indications to the crew and systems.

Other options don’t give this direct, reliable ground-status information: a nose gear height sensor isn’t a standard indicator of gear state, main gear differential pressure sensors reflect hydraulic pressure rather than gear position, and relying on pilot visual indicators alone lacks automatic verification and redundancy.