Safety
FAA G350/450 AD Addresses Test Malfunction

The FAA published an Airworthiness Directive December 12 on the Gulfstream G350/450 after what is described as routine maintenance testing by the manufacturer uncovered a fault in one of the aircraft test systems—the flap/stabilizer electronic control unit—used during normal checks by pilots before the first flight of the day. The test that failed normally confirms the operational readiness of the hydraulic brake used to stop the pitch trim motor in the event of a runaway of that system.