Bell Helicopter Textron Canada (BHTC) 40
Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters
Bell Helicopter Textron Canada (BHTC) 407 Series Helicopters
| AD/BELL 407/36 | Anti-drive Link Assembly | 7/2009 TX |
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| Applicability: | Bell Helicopter Textron Canada (BHTC) Helicopter Models 407 with anti-drive link assembly Part Number (P/N) 406-010-432-101 with a serial number (S/N) prefix TI or TIFS.Models affected: Model 407 - S/N 53000 through 53887, 53890 through 53916, 53918, 53920, 53921, 53923 through 53926, and 53928. |
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| Requirement: | Perform a one time inspection and if required, rectification, of the anti-drive link assembly P/N 406-010-432-101 to ensure that bearing P/N 406-310-403-101 is correctly staked in the link assembly in accordance with BHTC Alert Service Bulletin 407-09-87, dated 27 March 2009, or later approved revision.Note: Transport Canada AD CF-2009-14 dated 15 April 2009 refers. |
| Compliance: | Within the next 10 flight hours, but no later than 30 days from the effective day of this AD, unless already accomplished. |
| This Airworthiness Directive becomes effective on 6 May 2009. | |
| Background: | During a pre-flight check it was observed that the swash plate link assembly bearing P/N 406-310-403-101 had moved in the lever race making contact with the swash plate support. Further investigation has revealed that the bearing had not been staked correctly during manufacture.This situation, if not corrected, could lead to loss of control of the helicopter. |
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James Coyne
Delegate of the Civil Aviation Safety Authority
30 April 2009