1AD/DAUPHIN/43 - Main Rotor Head Frequency Adapter

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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Eurocopter SA 360 and SA 365 (Dauphin) Series Helicopters

AD/DAUPHIN/43 Main Rotor Head Frequency Adapter 10/96

Applicability: Model AS365N, N1, and N2 fitted with main rotor head frequency adapters:

P/N 704A33-640-031 (E1T2624-01A) or delivered in pairs under P/N 365A31- 1858-01, manufactured before the second quarter of 1991 (2T91) with a serial number equal to, or less than 8188; or

2. P/N 704A33-640-046 (E1T3023-01) or delivered in pairs under the P/N 365A31- 1858-02, manufactured before the second quarter of 1991 (2T91) with a serial number equal to, or less than 3122.

Requirement: Action in accordance with Eurocopter AS 365 SB 01.00.44.

Note: DGAC AD 96-117-040 refers.

Compliance: Within 100 hours time in service after 12 September 1996, or prior to 12 March 1997 whichever occurs first.

Background: Severe vibration has been found to be caused by separation of the elastomer and the centre metal section of the frequency adapters. The separation may be caused by a fault in the production process for certain frequency adapters.