AD/S-76/30 Amdt 1 - Tail Rotor Blade Elliptical Centering Plug and Retaining Pad
1AD/S-76/30 Amdt 1 - Tail Rotor Blade Elliptical Centering Plug and Retaining Pad
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COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY
SCHEDULE OF AIRWORTHINESS DIRECTIVES
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Sikorsky S-76 Series Helicopters
AD/S-76/30
Amdt 1
Applicability: Model S76A.
Tail Rotor Blade Elliptical Centering Plug and Retaining Pad
12/94
Requirement: Action in accordance with Sikorsky SB 76-65-35 Rev A.
Note: FAA AD 94-14-20 refers. This supersedes FAA AD 84-06-02.
Compliance: Unless already accomplished, within 25 hours time in service after 13 October 1994.
The effective date of the initial issue was 27 February 1984.
Background: An operator encountered severe vibration during flight while executing a left turn after take-off. Investigation revealed disbonding of the aluminium elliptical spar plug which allowed the tail rotor blade to be displaced in a radial direction. Amendment 1 withdraws the repetitive inspection requirement as a result of no further reports of failure following the inspection and modification in accordance with the Service Bulletin.