Airworthiness directives › 2014-08-06
AD 2014-08-06 Airworthiness Directives; Sikorsky Aircraft Corporation Helicopters
Applicability*9
This AD supersedes AD 2005-22-01, Amendment 39-14345 (70 FR 61721, October 26, 2005).
Compliance
(1) For MRH pilots with 1,500 or more hours time-in-service (TIS), within 50 hours TIS, and thereafter at intervals not to exceed 50 hours TIS, inspect the lower bifilar arm assembly for a crack in the lug attachment area. Conduct the inspection of the lower bifilar arm assembly by following the Accomplishment Instructions, paragraphs 3.A.(1) through 3.A.(6), of Sikorsky Alert Service Bulletin No. 76-65-62, dated December 14, 2004 (ASB 76-65-62). (i) If there is a crack on any bifilar assembly arm lug, before further flight, replace the bifilar arm assembly with an airworthy bifilar arm assembly. (ii) If no crack is found at the initial inspection, perform a one-time torque test. Perform the torque test and the additional torque procedures as stated in the Accomplishment Instructions, paragraphs 3.B.(1) through 3.B.(3), of ASB 76-65-62. The torque test is not required at the recurring inspection intervals of the lower bifilar arm assembly. (iii) Within 600 hours TIS, replace the MRH pilot, P/N 76103-08003-101, with an MRH pilot, P/N 76103-08003-102. (2) For MRH pilots with less than 900 hours TIS, prior to accumulating 1,500 hours TIS, replace the MRH pilot, P/N 76103-08003-101, with a MRH pilot, P/N 76103-08003-102. (3) After the effective date of this AD, do not install an MRH pilot, P/N 76103-08003-101, on any helicopter.
Required actions
Special flight permits will not be issued.
Unsafe condition
You are responsible for performing each action required by this AD within the specified compliance time unless it has already been accomplished prior to that time.
Affected ADs
This AD defines the unsafe condition as a crack on the MRH pilot bifilar assembly lug, which could result in failure of a bifilar lug, damage to the main rotor system, and subsequent loss of control of the helicopter.
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