Summary
We are adopting a new airworthiness directive (AD) for Sikorsky Aircraft Corporation (Sikorsky) Model S-92A helicopters. This AD requires inspecting the main gearbox (MGB) for a crack. This AD is prompted by a crack in the cored passage of the MGB housing, which may be indicated by oil on the housing. These actions are intended to detect a crack in the MGB housing, which could result in loss of oil, failure of the MGB, and subsequent loss of control of the helicopter.
Directive Details
AD Number
FAA-2012-0715
Document Number
2012-16944
Type
Rule
Publication Date
July 17, 2012
Effective Date
August 1, 2012
Affected Manufacturer
Sikorsky Aircraft Corporation
Criticality
important
Emergency
No
Docket ID
Docket No. FAA-2012-0715
Topics
Official Documents
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