Boeing 747 Series Aeroplanes
Boeing 747 Series Aeroplanes
Boeing 747 Series Aeroplanes
| AD/B747/348 | Outboard Strut Spring Beam MidpivotBolt and Midpivot Bolt Access Door | 8/2006 |
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| Applicability: | Model 747-100B, -200B, -200F, -300, -400, -400F, and 747SP series aircraft; as identified in Boeing Alert Service Bulletin 747-54A2225 original issue, or later FAA approved revision. |
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| Requirement: | Action in accordance with the technical requirements of FAA AD 2006-12-03 Amdt 39-14627. |
| Compliance: | As specified in the Requirement document, with a revised effective date of3 August 2006. |
| This Airworthiness Directive becomes effective on 3 August 2006. | |
| Background: | The FAA received reports indicating that the midpivot bolt and midpivot bolt access door of the spring beam of the inboard side of the outboard struts were installed in the incorrect position. If not installed in the correct position, a midpivot bolt could be overloaded and crack or fracture, which could result in loss of the spring load path and consequent separation of the associated outboard strut and engine from the aircraft. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
21 June 2006