Amber REVERSER light on the overhead panel causes MASTER CAUTION and ENG lights to illuminate after approximately how many seconds?

Amber REVERSER light on the overhead panel causes MASTER CAUTION and ENG lights to illuminate after approximately how many seconds?

• A. 5 seconds
• B. 12 seconds
• C. 20 seconds
• D. 30 seconds

Answer: (B)

The main idea is how cockpit warning logic uses a built‑in delay to avoid nuisance alerts while still catching real faults. When the amber REVERSER light on the overhead panel comes on, the system doesn’t immediately flood the crew with the Master Caution and engine warnings. It waits for a short, fixed interval to see if the condition resolves or remains abnormal. If the reverser indication stays active for about 12 seconds, the warning circuit escalates and the Master Caution along with the engine warning illuminate, drawing attention to a persistent reverser/engine issue. This timing prevents false alarms during normal reverser operations or brief transients, while still providing timely alert if the condition persists. Other intervals wouldn’t fit the intended balance: too short a delay risks warning during normal operation, while too long delays could leave pilots without prompt notice of a real fault.

The main idea is how cockpit warning logic uses a built‑in delay to avoid nuisance alerts while still catching real faults. When the amber REVERSER light on the overhead panel comes on, the system doesn’t immediately flood the crew with the Master Caution and engine warnings. It waits for a short, fixed interval to see if the condition resolves or remains abnormal. If the reverser indication stays active for about 12 seconds, the warning circuit escalates and the Master Caution along with the engine warning illuminate, drawing attention to a persistent reverser/engine issue.

This timing prevents false alarms during normal reverser operations or brief transients, while still providing timely alert if the condition persists. Other intervals wouldn’t fit the intended balance: too short a delay risks warning during normal operation, while too long delays could leave pilots without prompt notice of a real fault.