What is the term for an inspection conducted to re-check de-powered systems during flight?

• A. Post flight inspection
• B. Thru-flight inspection
• C. Preflight inspection
• D. Engine shutdown check

Answer: (B)

When systems are de-powered, you still want to verify they behave correctly while the aircraft is in flight, ensuring nothing unexpected crops up during operation. This in-flight recheck is called a thru-flight inspection. It’s distinct from a preflight inspection, which happens on the ground before takeoff to ensure the aircraft is ready, a post-flight inspection, which occurs after landing to catch issues from the flight, and an engine shutdown check, which is performed after engines are shut down on the ground to verify related systems respond properly. So, the term that fits re-checking de-powered systems during flight is the thru-flight inspection.