Bell Helicopter Textron Canada (BHTC) 43
Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters
Bell Helicopter Textron Canada (BHTC) 430 Series Helicopters
| AD/BELL 430/7 | Vertical Fin Attachment Bolts | 11/2006 |
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| Applicability: | Model 430 helicopters, serial numbers 49001 through 49036. |
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| Requirement: | 1. Check the torque of the vertical fin attachment bolts in accordance with Part 1 of BHTC Alert Service Bulletin (ASB) 430-98-5, or later Transport Canada approved revision.2. Modify the tailboom and vertical fin fitting attachment including replacement of hardware, in accordance with Part II of ASB 430-98-5, or later Transport Canada approved revision.3. Verify the correct torque of the attachment bolts in accordance with Part III, Special Inspections, of ASB 430-98-5, or later Transport Canada approved revision.Note: Transport Canada AD CF-98-23 refers. |
| Compliance: | 1. Unless already accomplished, within 25 hours time-in-service after the effective of this directive.2. Unless already accomplished, before 26 November 2006.3. Unless already accomplished, within 5 to 10 flight hours after incorporation of Requirement 2. |
| This Airworthiness Directive becomes effective on 26 October 2006. | |
| Background: | A loss of torque of the vertical fin attachment bolts resulted in the fracture four of the eight attachment bolts on a Model 230 helicopter, which is of similar design to the Model 430. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
13 September 2006