Reports of nuisance stall warnings triggered by frozen angle-of-attack (AOA) vanes has led FAA to mandate replacement of the parts on Boeing 757s, 767s and 727s. FAA, in a notice of proposed rulemaking set for publication July 9, is proposing a 36-month window for replacing affected AOA vanes—a shorter time period than Boeing recommended in alert service bulletins that target each model. Boeing issued the bulletins in the last six months. “We have ...

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