Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters

摘要

We are revising an earlier proposed airworthiness directive (AD) for the Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopter, which proposed revising the Rotorcraft Flight Manual (RFM), Operating Limitations section, to prohibit Class D external load operations, including human external cargo (HEC), because this model helicopter was not certificated to one-engine inoperative performance standards for carrying Class D external loads. This Supplemental NPRM is prompted by a recent design approval, which allows Class D external load operations if the appropriate operating limitations are included in the RFM. This proposed AD is intended to require appropriate operating limitations to allow operators to perform Class D external load-combination operations, including HEC, in this model helicopter that now meets the Category A performance standard.