FAA issues NPRM for Sikorsky S-61 main gearbox input freewheel units (Rotorhub)

[Rotor_Head]

ACTION: Notice of proposed rulemaking (NPRM). ----------------------------------------------------------------------- SUMMARY: This document proposes adopting a new airworthiness directive (AD) for the specified Sikorsky Aircraft Corporation (Sikorsky), Croman Corporation (Croman), Carson Helicopters, Inc. (Carson), and Siller Helicopters (Siller) model helicopters.

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