CTHIn ForceLegislation
AD/B747/258 Amdt 1 - Engine Pylon Diagonal Brace Underwing Fitting
Boeing 747 Series AeroplanesBoeing 747 Series Aeroplanes
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Boeing 747 Series Aeroplanes
| AD/B747/258 Amdt 1 | Engine Pylon Diagonal Brace Underwing Fitting | 4/2006 |
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| Applicability: | Model 747-100, -100B, -100B SUD, -200B, -200C, -200F, -300, -400, -400D, -400F, 747SR, and 747SP series aircraft, as listed in Boeing Alert Service Bulletin747-57A2312 Revision 1, or later FAA approved revision. |
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| Requirement: | Action in accordance with the technical requirements of FAA AD 2005-14-08Amdt 39-14185. |
| Compliance: | As specified in the Requirement document with a revised effective date of13 April 2006. |
| This Amendment becomes effective on 13 April 2006. | |
| Background: | The FAA requires certain inspections/actions to prevent loss of the underwing fitting load path due to missing or damaged alloy-steel taperlock fasteners, which could result in separation of the engine and strut from the aircraft.Amendment 1 is issued in response to a new FAA AD, which expands applicability to include additional aircraft models and requires a new inspection to determine fastener material. The FAA received reports indicating that cracked fasteners made of A286 material were found on aircraft that had only fasteners made of A286 material installed in the area common to the diagonal brace underwing fittings. |
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David Punshon
Delegate of the Civil Aviation Safety Authority
27 February 2006