AD 90-21-03
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L-1 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206L-3 | Airworthiness Directives BELL HELICOPTER TEXTRON, INC. BHTI Model 206A, 206A-1, 206B, 206B-1, 206L, 206L-1 and 206L-3 Helicopters |
Unsafe Condition
Loss of a tip weight, failure of the tail rotor blade assembly, loss of the tail rotor hub assembly, and subsequent loss of control of the helicopter.
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Required Actions
Inspect the aircraft to determine the part number and serial number of the installed tail rotor blade assembly. Remove and replace the assembly with an airworthy blade assembly if it has P/N 206-016-201-125 or -127 with a listed serial number.
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Compliance Time
before further flight
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Affected Aircraft
Bell Helicopter Textron Canada Limited Models 206A, 206A-1, 206B, 206B-1, 206L, 206L-1, and 206L-3 helicopters with tail rotor blade assembly P/N 206-016-201-125 or -127.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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