CASB issues Challenger emergency airworthiness directive

Following three in-service reports of Bombardier Challeger 604s suffering fractured fastener heads on the inboard flap hinge-box, the Canadian Aviation Safety Board (CASB) has issued an emergency airworthiness directive requiring the re-fitting of incorrectly fitted fasteners. The fasteners were the correct ones, but they were incorrectly orientated during fitting.

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