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AD/B747/157 Amdt 2 - P&W JT9D Aft Engine Mount Tangential Link
Boeing 747 Series AeroplanesBoeing 747 Series Aeroplanes
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Boeing 747 Series Aeroplanes
| AD/B747/157 Amdt 2 | P&W JT9D Aft Engine Mount Tangential Link | 1/2010 |
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| Applicability: | Model 747 series aeroplanes with line positions 1 to 668, powered by Pratt & Whitney JT9D series engines except JT9D-70. |
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| Requirement: | Terminating action in accordance with the technical requirements of paragraph (b) of FAA AD 99-20-09 Amdt 39-11339.Note: Boeing Service Bulletins 747-71-2206 and 747-71A2277 Revision 2, or later Revisions, refer. |
| Compliance: | Prior to initial issue of an Australian certificate of airworthiness. |
| This Amendment becomes effective on 8 January 2010. | |
| Background: | The tangential link upper bolt was found to have backed out following lubrication of the threads and/or inadequate nut torque which allowed the nut to rotate and disengage. The original issue of this Directive nominated FAA AD 96-03-01 and became effective on 13 March 1996.Amendment 1 specified Revision 1 of FAA AD 96-03-01 and became effective on20 June 1996.This Amendment specifies FAA AD 99-20-09 which superseded 96-03-01 and specified mandatory terminating action. |
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Mike Higgins
Delegate of the Civil Aviation Safety Authority
5 January 2010