Boeing 747 Series Aeroplanes
Boeing 747 Series Aeroplanes
Boeing 747 Series Aeroplanes
| AD/B747/377 | Fuselage Exterior Skin at Station 488 | 7/2008 |
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| Applicability: | Model 747-200F, -300, -400, and -400D series aircraft; as identified in Boeing Service Bulletin 747-53A2685 Revision 1, or later FAA approved revision. |
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| Requirement: | Action in accordance with the technical requirements of FAA AD 2008-09-20 Amdt 39-15501. |
| Compliance: | As specified in the Requirement document, with a revised effective date of3 July 2008. |
| This Airworthiness Directive becomes effective on 3 July 2008. | |
| Background: | The FAA received reports of missing fasteners from the shear clip of the sub frame to auxiliary sill joint and cracking of the adjacent exterior skin and internal doubler. Missing fasteners could result in cracks in the adjacent exterior skin and internal doubler, which can propagate and result in loss of structural integrity and sudden in-flight decompression of the aircraft. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
16 May 2008