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AD/B747/372 - Engine Core Cowl Flipper Doors
Boeing 747 Series AeroplanesBoeing 747 Series Aeroplanes
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Boeing 747 Series Aeroplanes
| AD/B747/372 | Engine Core Cowl Flipper Doors | 3/2008 |
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| Applicability: | Model 747-200B, -300, -400, -400D, and -400F series aircraft, equipped with General Electric CF6-80C2 engines. |
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| Requirement: | Action in accordance with the technical requirements of FAA AD 2007-26-07 Amdt 39-15309.Note: Boeing Special Attention Service Bulletin 747-71-2310 original issue, and Rohr Service Bulletin TBC/80C2-NAC-71-035 original issue, or later FAA approved revisions, refer. |
| Compliance: | As specified in the Requirement document, with a revised effective date of13 March 2008. |
| This Airworthiness Directive becomes effective on 13 March 2008. | |
| Background: | The FAA received two reports of missing flipper doors for the engine core cowls. Migrated hinge pins and damaged flipper doors, unless detected and corrected, could allow the flipper door to fall off. This could allow an engine fire to propagate into the flammable leakage zone of the strut and for the amount of fire extinguishing agent reaching the fire to be diluted. The result could be an uncontained fire in the engine compartment. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
30 January 2008