U.S. FAA updates airworthiness directive on Boeing 777s

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The Federal Aviation Administration’s superseding airworthiness directive “was prompted by a report of a crack found in a front spar lower chord,” it said in the Federal Register notice. Errors in the earlier directive also “introduced a new unsafe condition related to the application of certain fastener cap seals,” it said.

Representatives for Boeing and the FAA could not be immediately reached for comment.