Airworthiness directives › 2020-16-19
AD 2020-16-19 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, serial number (S/N) 920006 through 920304 inclusive and S/N 920311 through 920314 inclusive, certificated in any category.
Compliance
Comply with this AD within the compliance times specified, unless already done.
Required actions
Within 400 hours time-in-service: (1) For helicopters S/N 920006 through 920296 inclusive: (i) Install Modification (MOD) Kit Clips and Brackets part number (P/N) 92070-20115-015 by following the Instructions, paragraph B. of Sikorsky Special Service Instructions No. 92-121, dated October 26, 2017 (SSI 92-121). (ii) Install the first portion of MOD Kit Auxiliary Circuit Breaker Panel P/N 92070-55075-011 by following the Instructions, paragraph C. of Sikorsky SSI 92-121. (iii) Install MOD Kit Left Hand (LH) Cockpit Auxiliary Power Unit P/N 92070-55096-012 by following the Instructions, paragraph D. of Sikorsky SSI 92-121. (iv) Install MOD Kit LH Cabin Auxiliary Power Unit P/N 92070-55096-013 by following the Instructions, paragraph E. of Sikorsky SSI 92-121. (v) Install MOD Kit LH Top Deck FLD P/N 92070-55096-016 by following the Instructions, paragraph F. of Sikorsky SSI 92-121. (vi) Install MOD Kit MGB XMSN P/N 92070-55096-017 by following the Instructions, paragraph G. of Sikorsky SSI 92-121. (vii) Install the completion portion of MOD Kit Auxiliary Circuit Break Panel P/N 92070-55075-011 by following the Instructions, paragraph H. of Sikorsky SSI 92-121. (viii) Install MOD Kit Auxiliary Cabin Panel Faceplate P/N 92070-55075-012 by following the Instructions, paragraph J. of Sikorsky SSI 92-121. (2) For helicopters S/N 920297 through 920304 inclusive and S/N 920311 through 920314 inclusive: (i) Modify the auxiliary circuit breaker panel and transmission harness by following the Instructions, paragraph I. of Sikorsky SSI 92-121. (ii) Install MOD Kit Auxiliary Cabin Panel Faceplate P/N 92070-55075-012 by following the Instructions, paragraph J. of Sikorsky SSI 92-121. (3) Insert a copy of the Rotorcraft Flight Manual (RFM) Supplement No. 45, Revision No. 2, Sikorsky Model S-92A, Part 1, dated April 27, 2017, into the existing RFM for your helicopter.
Unsafe condition
This AD was prompted by two incidents of erroneous low oil pressure caution cockpit indications and unintended actuation of the main gearbox (MGB) auto bypass valve. The FAA is issuing this AD to prevent the M XMSM OIL WARN circuit breaker from presenting erroneous cautions when tripped. The unsafe condition, if not addressed, could result in erroneous low oil pressure caution cockpit indication, unintended actuation of the MGB auto bypass valve, increased oil temperature, conflicting indications, and forced landing of the helicopter.
Affected ADs
None.
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