New regulatory directive AD 2021-20-09 mandates compliance actions for the ATR-42-72 family of airplanes.
Airworthiness directive
New regulatory directive AD 2021-20-09 mandates compliance actions for the ATR-42-72 family of airplanes.
Primary source: https://www.federalregister.gov/documents/2021/11/19/2021-25203/airworthiness-directives-atr-gie-avions-de-transport-rgional-airplanes
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