Airworthiness directives › 2022-02-01
AD 2022-02-01 Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
Models named: S-92A. Read the applicability below — it usually turns on serial or part numbers too.
Applicability*9
This AD applies to Sikorsky Aircraft Corporation Model S-92A helicopters, certificated in any category, with a main rotor stationary swashplate assembly (swashplate assembly) part number (P/N) 92104-15011-042 or P/N 92104-15011-043 that has accumulated 1,600 or more total hours time-in-service, installed.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
(1) Within 50 hours time-in-service (TIS) after the effective date of this AD, and thereafter at intervals not to exceed 50 hours TIS, visually inspect the swashplate assembly for a crack, nick, dent, and scratch, by following the Accomplishment Instructions, Section 3, paragraph B. (except paragraphs B.(2)(a) through (c)) of Sikorsky S-92 Helicopter Alert Service Bulletin ASB 92-62-009, Basic Issue, dated February 6, 2019. (2) If there is a crack, nick, dent, or scratch that exceeds the allowable limits, before further flight, remove the swashplate assembly from service.
Unsafe condition
This AD was prompted by the discovery of a crack on the swashplate assembly inner ring. This condition, if not detected and corrected, could result in fretting wear on the shoulder that supports the clamp-up of the uniball outer race, failure of the swashplate assembly, and subsequent loss of control of the helicopter.
Affected ADs
None.
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The directive text above is reproduced from the Federal Register, a work of the United States government and in the public domain. The separation into applicability, compliance and required actions is TrackAD's.*1