AD 2020-17-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Textron | Canada Limited | Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters |
| aircraft | Bell | Helicopter Textron Canada Limited | Airworthiness Directives; Bell Helicopter Textron Canada Limited Helicopters |
Unsafe Condition
Corrosion on tail rotor (T/R) links between the roll staked lip of bearing P/N 429-312-107-103 and the beveled edge of T/R link P/Ns 429-012-112-101/-103.
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Required Actions
Inspect each T/R link bearing bore between the roll staked lip of the bearing outer race and the link bearing bore with 10X magnification for corrosion and pitting. If there is corrosion or pitting, replace the link. If there is no corrosion or pitting, clean the area and perform a second inspection with 10X magnification for corrosion and pitting. If there is no corrosion or pitting, remove the torque stripe, clean the area, and apply corrosion preventative sealant. Perform a repetitive inspection with the corrosion preventative sealant removed and reapplied every 12 months.
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Compliance Time
Within 12 months of effective date
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Affected Aircraft
Bell Helicopter Textron Canada Limited Model 429 helicopters with T/R link part numbers 429-012-112-101, -101FM, -103, -103FM, -112-111, -111FM, -113, and -113FM installed.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 4, 2026
Rights: U.S. Government Public Domain
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