AD 2021-17-02 Prompted By False Activation Of The Stall Warning System Due To Wiring Damage
The FAA is superseding Airworthiness Directive (AD) 2020-23-13, which applied to all ATR–GIE Avions de Transport Régional Model ATR42-200, -300, and -320 airplanes. AD 2020-23-13 required a one-time inspection for discrepancies of the wire bundles between the left- and right-hand angle of attack (AOA) probes and the crew alerting computer, and, depending on findings, applicable corrective actions. This AD continues to require the actions in AD 2020-23-13, and also requires for certain airplanes, modifying the captain stick shaker wiring, and for all airplanes, revising the existing aircraft flight manual (AFM) and applicable corresponding opera