AD 2021-20-11
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Bell Helicopter Textron Canada Limited | 429 | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
| aircraft | Textron | Various | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
| aircraft | Bell | Various | Airworthiness Directives; Bell Textron Canada Limited (Type Certificate Previously Held by Bell Helicopter Textron Canada Limited) Helicopters |
Unsafe Condition
Reports of incorrectly staked spherical bearings in the directional control bellcrank assembly, which could result in wear or elongation of the bore in the bellcrank, and reduced helicopter directional control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the lower surface of the spherical bearing in the directional control bellcrank assembly to determine if it is properly staked, and depending on the findings, replace the spherical bearing with a new spherical bearing, repair the affected bellcrank assembly and repetitive inspections of that repaired bellcrank assembly, or replace the affected bellcrank assembly with a serviceable part.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 50 flight hours
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Affected Aircraft
Bell Textron Canada Limited (type certificate previously held by Bell Helicopter Textron Canada Limited) Model 429 helicopters, serial numbers 57001 through 57210, 57212 through 57344, 57346 through 57371, 57374 through 57377, and 57380.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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