Airworthiness directives › 2015-11-10
AD 2015-11-10 Airworthiness Directives; Sikorsky Aircraft Corporation (Sikorsky) Model Helicopters
Applicability*9
This AD becomes effective July 14, 2015.
Compliance
Special flight permits are prohibited.
Required actions
(1) The Manager, Boston Aircraft Certification Office, FAA, may approve AMOCs for this AD. Send your proposal to: Michael Schwetz, Aviation Safety Engineer, Boston Aircraft Certification Office, Engine & Propeller Directorate, FAA, 12 New England Executive Park, Burlington, Massachusetts 01803; telephone (781) 238-7761; email michael.schwetz@faa.gov. (2) For operations conducted under a 14 CFR part 119 operating certificate or under 14 CFR part 91, subpart K, we suggest that you notify your principal inspector, or lacking a principal inspector, the manager of the local flight standards district office or certificate holding district office before operating any aircraft complying with this AD through an AMOC.
Unsafe condition
Within 500 hours time-in-service: (1) Insert a copy of the Sikorsky S-92A Rotorcraft Flight Manual (RFM) Supplement No. 45, Part I, dated July 30, 2012, into the RFM. (2) For helicopters with S/N 920006 through 920132: (i) Install an MGB failed pump sensor, Modification Kit Part Number (P/N) 92070-35007-011. (ii) Install MGB vacuum switch wiring, Modification Kit P/N 92070-55039-013. (3) For helicopters with S/N 920006 through 920179: (i) Install an MGB auto bypass system, Modification Kit P/N 92070-55061-011. (ii) Activate Aircraft Management System 7.1 software to show a new MGB “OIL OUT” visual warning. (iii) Install enhanced ground proximity warning system software version 030.
Affected ADs
This AD defines the unsafe condition as main gearbox (MGB) oil loss, which could lead to failure of the MGB and subsequent loss of control of the helicopter.
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