airworthiness · Rule · Final rule. · Published 2017-04-07 · Effective 2017-05-12 · 82 FR 16897
Document
Document number
2017-06708
Federal Register citation
82 FR 16897
Type
Rule
Action
Final rule.
Category
airworthiness
Manufacturer
Sikorsky
Publication date
2017-04-07
Effective date
2017-05-12
FAA docket
Docket No. FAA-2015-7095
Abstract
We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This AD requires removing from service the tail gearbox center housing (housing) when it has 12,200 or more hours time-in-service (TIS). This AD was prompted by fatigue analysis conducted by Sikorsky that determined the housing required a retirement life. The actions are intended to prevent an unsafe condition on these products.