AD 99-17-17
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson Helicopter Company | R44 | Airworthiness Directives; Robinson Helicopter Company Model R44 Helicopters |
Unsafe Condition
Failure of the yoke assembly, part number C908-1C, from manufacturing Lots 36B, 37, or 38, due to a crack at the weld joint, which could result in loss of main and tail rotor drive and subsequent loss of control of the helicopter.
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Required Actions
Replace the yoke assembly, P/N C908-1C, from Lots 36B, 37, or 38 with an airworthy yoke assembly from a different lot, following steps 2 through 12 of RHC R44 Service Bulletin SB-35. Compliance is required prior to further flight.
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Compliance Time
Before further flight
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Affected Aircraft
Robinson Helicopter Company Model R44 helicopters with yoke assemblies, P/N C908-1C, from Lots 36B, 37, or 38 installed, specifically serial numbers 0219 and 0535 through 0608 (excluding 0565, 0582, 0592).
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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