AD 75-18-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 206A | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206A-1 (OH-58A) | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
| aircraft | Bell Helicopter Textron Canada Limited | 206B-1 | Airworthiness Directives; Bell Models 206A, 206B, 206A-1, and 206B-1 Helicopters |
Unsafe Condition
Loss of attaching bolt torque for the main rotor blade hub pillow blocks.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove the four nuts, bolts, washers (P/N 206-010-171-1), and bushings (P/N 206-010-170-1) attaching the pillow block assemblies to the main rotor yoke. Install flanged bushings (P/N 206-011-128-1) into the pillow blocks with flanges facing outboard, secure with nuts, bolts, and washers, and torque to 60 inch pounds plus drag torque of the self-locking nut.
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Compliance Time
within 600 hours' time in service after the effective date of this AD
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Affected Aircraft
Bell Models 206A, 206B, 206A-1, and 206B-1 helicopters certificated in all categories.
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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