BELL HELICOPTER TEXTRON Model 412 and 412EP helicopters [Docket No. FAA-2012-1016; Directorate Identifier 2010-SW-009-AD] – proposes to establish a lower life limit on certain outer rings, requiring a revision of the retirement life on the components’ history card or equivalent record, and a revision of the maintenance manual or Instructions for Continued Airworthiness (ICA). This proposal also would prohibit installing these outer rings on any helicopter. This proposed AD is prompted by ...

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