AD 2005-21-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | 47D1 | Airworthiness Directives; Bell Helicopter Textron Model 47D1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A and Coastal Helicopters, Inc. Model OH-13H (Tomcat Mark 5A, 6B, 6C) Helicopters |
| aircraft | Bell | Helicopter Textron Model 47D1 | Airworthiness Directives; Bell Helicopter Textron Model 47D1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A and Coastal Helicopters, Inc. Model OH-13H (Tomcat Mark 5A, 6B, 6C) Helicopters |
Unsafe Condition
Failure of the scissors assembly or weld assembly scissors bracket past its life limit could result in loss of control of the helicopter.
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Required Actions
Within 60 days, determine and record the total hours time-in-service (TIS) of each affected part. If TIS cannot be determined, replace the part with an airworthy part before further flight. Replace each affected part before it accumulates 5,000 hours TIS.
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Compliance Time
Within 60 days
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Affected Aircraft
Bell Helicopter Textron Models 47D1, 47G, 47G-2, 47G-2A, 47G-2A-1, 47G-3, 47G-3B, 47G-3B-1, 47G-3B-2, 47G-3B-2A, 47G-4, 47G-4A, 47G-5, 47G-5A, and Coastal Helicopters, Inc. Model OH-13H (Tomcat Mark 5A, 6B, 6C) helicopters with Texas Helicopter Co., Inc. (THC) scissors assembly part number (P/N) 74-150-949-9, 74-150-949-5, 74-150-249-5M, or weld assembly scissors bracket P/N 74-150-117-13M installed as a Parts Manufacturer Approval (PMA) replacement part or as part of the modification in accordance with Supplemental Type Certificate (STC) No. SH2772SW.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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