The REVERSER AIR/GRD light illuminates when?

The REVERSER AIR/GRD light illuminates when?

• A. The air/ground thrust reverser logic has failed.
• B. The reverser is deployed.
• C. The engine is at ground idle.
• D. The start valve is open.

Answer: (A)

The light is a fault indicator for the reverser air/ground logic. This logic determines whether the aircraft is on the ground or in the air so that thrust reversers are commanded only in safe conditions. When that logic detects a fault or failure in its sensing or processing, the warning light comes on to alert the crew that the reverser control is not reliable. It doesn’t indicate normal states like the reverser being deployed, the engine idling on the ground, or the start valve being open. Those conditions are not faults of the air/ground logic, and would be indicated by other signals or none at all if everything is normal.

The light is a fault indicator for the reverser air/ground logic. This logic determines whether the aircraft is on the ground or in the air so that thrust reversers are commanded only in safe conditions. When that logic detects a fault or failure in its sensing or processing, the warning light comes on to alert the crew that the reverser control is not reliable. It doesn’t indicate normal states like the reverser being deployed, the engine idling on the ground, or the start valve being open. Those conditions are not faults of the air/ground logic, and would be indicated by other signals or none at all if everything is normal.