How long is the Wing Anti-ice ground test sequence?

How long is the Wing Anti-ice ground test sequence?

• A. 15 seconds
• B. 30 seconds
• C. 60 seconds
• D. 45 seconds

Answer: (B)

Wing anti-ice ground testing is timed to ensure the system has enough opportunity to move the valve, allow bleed air to reach the wing leading edge, and stabilize so any faults or abnormal indications can be observed. The standard duration is 30 seconds because this window lets the anti-ice valve reach the commanded position and the system reach a steady state without wasting bleed air or delaying fault detection. Shorter times may not complete the cycle, while longer times aren’t necessary and can mask slow faults or waste bleed air.

Wing anti-ice ground testing is timed to ensure the system has enough opportunity to move the valve, allow bleed air to reach the wing leading edge, and stabilize so any faults or abnormal indications can be observed. The standard duration is 30 seconds because this window lets the anti-ice valve reach the commanded position and the system reach a steady state without wasting bleed air or delaying fault detection. Shorter times may not complete the cycle, while longer times aren’t necessary and can mask slow faults or waste bleed air.