CTHIn ForceLegislation
AD/BELL 206/173 - Disc Assemblies - Tail Rotor Driveshaft
Bell Helicopter Textron Canada (BHTC) 20Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters
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Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters
| AD/BELL 206/173 | Disc Assemblies - Tail Rotor Driveshaft | 12/2007 DM |
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| Applicability: | Bell Helicopter Textron Canada (BHTC) Model 206 series helicopters S/N up to 4618 and Model 206L series helicopters S/N up to 52340 fitted with disc assemblies P/N 32721-1. |
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| Requirement: | 1. Verify disc assemblies P/N 32721-1 for manufacturing date, proper thickness and indexing, in accordance with the instructions provided in the applicable Alert Service Bulletins (ASB) listed below or later approved revisions.206 series: ASB-206-07-114 dated 28 March 2007206L series: ASB-206L-07-145 dated 28 March 2007If disc assemblies, after verification in accordance with Requirement 1, do not require any further action, or if the manufacturing date is not between 1 November 2005 and 30 November 2006, make an appropriate log book entry to this effect. No further action is required.2. Remove any disc assembly which is not within the required thickness of 0.115 - 0.127 inch (2.921 - 3.225 mm).3. Remove any disc assembly which is not properly indexed.4. Do not install any disc assembly P/N 32721-1 into any helicopter unless it is compliant to the applicable Alert Service Bulletins (ASB) listed below or later approved revisions.206 series: ASB-206-07-114 dated 28 March 2007.206L series: ASB-206L-07-145 dated 28 March 2007.Note: Transport Canada Airworthiness Directive CF-2007-16 dated 24 August 2007 refers. |
| Compliance: | 1. Unless already accomplished, no later than 25 flight hours or 30 days from the effective date of this directive, whichever comes first.2. Within 10 flight hours, after the completion of requirement 1.3. Within 300 flight hours or at next scheduled inspection, whichever comes first, after the completion of requirement 1.4. After the effective date of this Airworthiness Directive. |
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| This Airworthiness Directive becomes effective on 3 October 2007. | |
| Background: | Transport Canada has determined that disc assemblies part number (P/N) 32721-1 manufactured between 1 November 2005 and 30 November 2006, may have discs of improper thickness or discs may have been indexed incorrectly. |
Image unavailable in extracted text David Villiers Delegate of the Civil Aviation Safety Authority