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