Document ID: chunk:federal_register_of_legislation:F2006B08516:body:0:p2
Version: federal_register_of_legislation:F2006B08516
Segment Type: other
Provision Reference: 
Character Range: 2990–4649

1.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

              4.         For twin engined aircraft, with both engines applicable, all suspect gearshafts on one of the engines must be replaced in accordance with actions 1-2 above.

              5.         For four engined aircraft which have more than one engine applicable to the provisions of this directive, replace all suspect gearshafts, on all applicable engines (in accordance with actions 2-7 above), such that no more than one applicable engine with suspect gearshafts remains in service on any four engined aircraft.

           Note 1: Actions listed above which have already been completed under AD/CFM- 56/8 need not be repeated under this directive.

           Note 2: DGAC T98-097 (B) dated 25 February 1998 refers.

 Compliance: 1. Before 01 February 1998.

2.         Engines on List 2A before 01 February 1998; engines on List 2B before 15 April 1998.

3.         Engines on List 3A before 01 February 1998; engines on List 3B before 15 April 1998.

4.         Before next flight.

5.         Before next flight.

           This airworthiness directive becomes effective on 26 March 1998.

           Background: Three in flight shut downs were experienced due to failure of starter gearshafts in the accessory gearbox (AGB).              The first analysis results shows also a risk of failure of the conical gearshafts of the transfer gearbox (TGB) which could lead to an in flight shut down. This directive supersedes the CFM56-5 requirements of AD/CFM-56/8 which has been cancelled.