AD 2001-01-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Sikorsky | Aircraft Corporation Model S-76A | Airworthiness Directives; Sikorsky Aircraft Corporation Model S-76A, S-76B, and S-76C Helicopters |
Unsafe Condition
Corrosion due to dissimilar metals in the main landing gear positioning rod assembly and side brace rod end can cause failure of the rod end, leading to landing gear collapse and subsequent loss of control during landing.
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Required Actions
Inspect the rod assembly and rod end for corrosion within 14 days. Replace any corroded parts with airworthy parts before further flight. Conduct repetitive inspections for corrosion on certain rod ends at intervals not exceeding 90 days, and on other rod ends at intervals not exceeding 12 months or 1,500 hours time-in-service, whichever occurs first.
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Compliance Time
Within 14 days for initial inspection; repetitive inspections at specified intervals thereafter.
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Affected Aircraft
Sikorsky Aircraft Corporation Model S-76A, S-76B, and S-76C helicopters up to and including serial number 760513, with positioning rod assembly (part number 1945E-31A or 2071-31) or side brace rod end (part number 1945E-235 or 2071-235) installed.
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Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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