What does an illuminated amber REVERSER light on the aft overhead panel indicate?

What does an illuminated amber REVERSER light on the aft overhead panel indicate?

• A. the thrust reverser control valve or isolation valve is not in the commanded position
• B. the thrust reverser is deployed
• C. the reverser is stowed
• D. the reverse valve is locked

Answer: (A)

This light is all about the system knowing where the thrust reversers should be versus where they actually are. The amber REVERSER light comes on to warn that the reverser system isn’t in the position that the controls commanded, meaning the valve or isolation valve that directs hydraulic power to the reversers isn’t where it’s supposed to be. In other words, there’s a mismatch between what the cockpit input asks for and what the hardware is actually doing, which could be due to a valve fault, actuator issue, or a sensing/discrepancy in position feedback. Because of that, the light signals a caution rather than a normal indication. It’s not simply indicating deployed or stowed status (those would be indicated differently if at all), and it isn’t saying the valve is locked. It’s specifically highlighting that the commanded position isn’t being achieved, so the reversers may not respond as expected.

This light is all about the system knowing where the thrust reversers should be versus where they actually are. The amber REVERSER light comes on to warn that the reverser system isn’t in the position that the controls commanded, meaning the valve or isolation valve that directs hydraulic power to the reversers isn’t where it’s supposed to be. In other words, there’s a mismatch between what the cockpit input asks for and what the hardware is actually doing, which could be due to a valve fault, actuator issue, or a sensing/discrepancy in position feedback.

Because of that, the light signals a caution rather than a normal indication. It’s not simply indicating deployed or stowed status (those would be indicated differently if at all), and it isn’t saying the valve is locked. It’s specifically highlighting that the commanded position isn’t being achieved, so the reversers may not respond as expected.