Bell Helicopter Textron Canada (BHTC) 20
Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters
Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters
| AD/BELL 206/163 | Vertical Stabiliser Supportsand Vertical Stabiliser | 9/2006 |
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| Applicability: | Model 206 A/B helicopters, serial numbers 004 through 3906, equipped with two-piece fin supports, part numbers 206-031-417-003/-007 and 206-031-418-001/-005. |
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| Requirement: | 1. Accomplish the inspection and restoration as indicated for the applicable vertical stabiliser and its supports in accordance with Bell Helicopter Textron Canada Alert Service Bulletin 206-06-107, or later Transport Canada approved revision.2. Amend the maintenance program as specified in BHT-206A/B-Series-MM, Revision 4, to require a recurring torque check of the vertical stabiliser attaching hardware at the scheduled 100-hr / annual inspection.Note: Transport Canada AD CF-2006-12 refers. |
| Compliance: | At the next scheduled 100-hour or annual inspection, but not later than 3 months after 31 August 2006. |
| This Airworthiness Directive becomes effective on 31 August 2006. | |
| Background: | Investigation of a recent accident revealed that the vertical stabiliser (fin) supports had failed. During the investigation it was observed that the tail boom vertical fin supports and the adjoining mating surface of the vertical fin inserts were painted. Painting of these surfaces is not appropriate since the paint coating may affect the stability or permanence of the installation. In addition, paint on the supports may affect inspection of the joint. The corrective action required by this Directive is specific to the earlier design tail boom that utilised forged supports. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
19 July 2006