What color is the START VALVE OPEN alert light?

What color is the START VALVE OPEN alert light?

• A. Red
• B. Amber
• C. Green
• D. Blue

Answer: (B)

Ambers are used for cautionary indications that something is happening you need to monitor, not a fault that demands immediate action. The START VALVE OPEN alert light signals that the air-start valve has opened to allow bleed air during the start sequence. That opening is a normal, progress-step event, so the amber light appropriately flags you to observe the status without implying a failure. If it were red, that would imply a fault; green would imply a normal, steady state rather than a transient start condition; blue is used for other informational cues and isn’t the standard color for this start-effort indication.

Ambers are used for cautionary indications that something is happening you need to monitor, not a fault that demands immediate action. The START VALVE OPEN alert light signals that the air-start valve has opened to allow bleed air during the start sequence. That opening is a normal, progress-step event, so the amber light appropriately flags you to observe the status without implying a failure. If it were red, that would imply a fault; green would imply a normal, steady state rather than a transient start condition; blue is used for other informational cues and isn’t the standard color for this start-effort indication.