During a Level 3 FADEC Failure, fuel flow on the affected engine will be frozen at its present value.

During a Level 3 FADEC Failure, fuel flow on the affected engine will be frozen at its present value.

• A. True
• B. False
• C. Not Specified
• D. Unknown

Answer: (A)

In a Level 3 FADEC failure, the engine’s fuel flow is held at the value it is on at the moment the fault is detected. This freeze prevents sudden, uncontrolled changes in fuel delivery as the FADEC loses its control authority, giving you a stable baseline to work with during the degraded condition. The system is designed this way to avoid rapid surges or drops in power, which could be dangerous in flight, and to keep the engine from drifting toward flameout or overspeed while you manage the situation. Since the standard defines this protective behavior, stating that fuel flow will be frozen at its present value is correct. The alternatives imply the behavior isn’t defined or is changing, which isn’t how Level 3 FADEC faults are described.

In a Level 3 FADEC failure, the engine’s fuel flow is held at the value it is on at the moment the fault is detected. This freeze prevents sudden, uncontrolled changes in fuel delivery as the FADEC loses its control authority, giving you a stable baseline to work with during the degraded condition. The system is designed this way to avoid rapid surges or drops in power, which could be dangerous in flight, and to keep the engine from drifting toward flameout or overspeed while you manage the situation.

Since the standard defines this protective behavior, stating that fuel flow will be frozen at its present value is correct. The alternatives imply the behavior isn’t defined or is changing, which isn’t how Level 3 FADEC faults are described.