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AD/BELL 222/32 - Main Rotor Yoke - 2
Bell Helicopter Textron Canada (BHTC) 22Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters
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Bell Helicopter Textron Canada (BHTC) 222 Series Helicopters
| AD/BELL 222/32 | Main Rotor Yoke - 2 | 8/2005 |
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| Applicability: | Model 222 helicopters, serial numbers 47006 through 47089,Model 222B helicopters, serial numbers 47131 through 47156,Model 222U helicopters, serial numbers 47501 through 47574,Model 230 helicopters, serial numbers 23001 through 23038. |
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| Requirement: | Action in accordance with Bell Helicopter Textron Alert Service Bulletin 222-03-97, 222U-03-68, or 230-03-28, as applicable, or later revisions approved by Transport Canada.Note: Transport Canada AD CF-2003-27 refers. |
| Compliance: | For Part I of the Requirement document:Within 50 flight hours after 4 August 2005, and thereafter at intervals not to exceed 25 flight hours.For Part II of the Requirement document:Within 50 flight hours after 4 August 2005, and thereafter at intervals not to exceed 50 flight hours. |
| This Airworthiness Directive becomes effective on 4 August 2005. | |
| Background: | Transport Canada received a report of a fatigue crack being found in a main rotor yoke, part number 222-011-102-105, in the area of the flapping bearing bushing. It was determined that the buffer pad installed under the bushing flange during manufacture had deteriorated to the point that there was metal-to-metal contact, resulting in heavy fretting, which led to crack initiation. |
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David Villiers
Delegate of the Civil Aviation Safety Authority
24 June 2005