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AD/BELL 427/8 - Vertical Fin Attachment
Bell Helicopter Textron 427 Series HelicBell Helicopter Textron 427 Series Helicopters
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Bell Helicopter Textron 427 Series Helicopters
| AD/BELL 427/8 | Vertical Fin Attachment | 13/2007 |
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| Applicability: | BHTC Model 427 helicopters, serial numbers 56001 through 56057, 58001 and 58002. |
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| Requirement: | Inspect the area of the vertical fin to tail rotor gearbox attachment and install a new hardware, in accordance with BHTC Alert Service Bulletin 427-06-15 original issue, dated 13 November 2006, or later Transport Canada approved revision.Note: Transport Canada AD CF-2007-22 refers. |
| Compliance: | Before 31 December 2007, unless already accomplished. |
| This Airworthiness Directive becomes effective on 20 December 2007. | |
| Background: | The manufacturer has determined that the existing hardware connecting the vertical fin to the tail rotor gearbox requires upgrading, in order to ensure vertical fin security. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
7 November 2007