1AD/CF6/34 - Fan Reverser Centre Drive Unit

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY

SCHEDULE OF AIRWORTHINESS DIRECTIVES

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General Electric Turbine Engines - CF6 Series

AD/CF6/34 Fan Reverser Centre Drive Unit 11/95

Applicability: CF6-80C2 series engine installations.

Requirement: Action in accordance with the technical requirements of FAA AD 95-10-11 Amdt 39- 9228.

Note: Martin Marietta CF6-80C2 SB No. 78-1002 Revision 1 also refers.

Compliance: As specified in the Requirement Document with a revised effective date of 12 October 1995.

Background: The FAA received a report that during routine maintenance a centre drive unit (CDU) was not able to hold the fan reverser translating cowl when it was manually driven to its stow position. Investigation highlighted a CDU brake shaft manufacturing error. This situation could result in the possible movement of the fan reverser translating cowl towards the deploy position in flight.