Document ID: chunk:federal_register_of_legislation:F2006B08517:body:0:p2
Version: federal_register_of_legislation:F2006B08517
Segment Type: other
Provision Reference: 
Character Range: 2985–4572

service the output bevel gearshaft in the TGB in accordance with Service Bulletin CFM56-3/ -3B/ -3C S/B 72-865.
 COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

              5.         For all engines in List 3, remove from service the intermediate gearshaft cluster (44x73 teeth) in the AGB in accordance with Service Bulletin CFM56-3/ -3B/ - 3C S/B 72-873.

              6.         For twin engined aircraft which have both engines in one or more of the applicability lists, all the suspect gearshafts (as identified in items 2 - 5 above) on one engine must be replaced.

           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 T98-096 (B) dated 25 February 1998 refers.

 Compliance: 1. Daily.

2.    For engines in List 1A, before 20 December 1997. For engines in List 1 B, before 20 January 1998.

3.    Before 20 December 1997.

4.    Before 20 January 1998.

5.    Before 15 April 1998.

6.    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 CFM56-3 requirements of AD/CFM-56/8 which has been cancelled.