AD 97-16-02
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson Helicopter Company | R44 | Airworthiness Directives; Robinson Helicopter Company Model R44 Helicopters |
Unsafe Condition
Failure of the sprag clutch to lock in the driving direction, resulting in loss of power to the main rotor system and a subsequent forced landing; or failure of the sprag clutch to unlock in the overrunning direction, which combined with engine failure could result in inability to autorotate and loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect both up-limit switches (part number V3-1001) for proper operation within 25 hours time-in-service after the effective date and every 100 hours thereafter. Replace any non-functional up-limit switch. Replace clutch assembly part number C018-1 with C018-2 or C018-2A within 50 hours time-in-service after the effective date.
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Compliance Time
within 25 hours time-in-service after the effective date and thereafter at intervals not to exceed 100 hours TIS for inspections; within 50 hours time-in-service after the effective date for clutch replacement
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Affected Aircraft
Robinson Helicopter Company Model R44 helicopters, serial numbers 0001 through 0332
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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