AD 2025-11-07
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson | Helicopter Company | Airworthiness Directives; Robinson Helicopter Company Helicopters |
Unsafe Condition
Fatigue cracking on the clutch shaft forward yoke (yoke) on the main rotor (M/R) drive, which could result in loss of M/R drive and consequent loss of control of the helicopter.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Visually inspect the forward flex plate assembly (P/N C947-1) for loose fasteners, cracks, fretting, corrosion, wear, and ensure washers are bonded to both sides of each flex plate arm. Remove and replace the flex plate if any issues are found. Visually inspect yokes (P/N C907-1, C907-2, or C908-1) for cracks, corrosion, and fretting; remove and replace if issues are found. Visually inspect each flex plate bolt for missing or unaligned torque stripes, loose fasteners, loose nuts, and ensure palnuts are installed; remove and replace the assembly if issues are found.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within 100 hours time-in-service (TIS) after the effective date of this AD.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Robinson Helicopter Company Model R44 and R44 II helicopters, certificated in any category.
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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