The National Transportation Safety Board is recommending that FAA significantly scale back a proposed airworthiness directive (AD) seeking inspections and replacement of Engine Components Inc. (ECi) and Airmotive Engineering “Titan” cylinders found on 6,000 Continental 520 and 550 model reciprocating engines. FAA issued the proposal AD in August, citing investigations into numerous reports of cylinder head-to-barrel separations and cracked and leaking aluminum cylinder heads on the ...


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