AD 98-22-16
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson Helicopter Company | R44 | Airworthiness Directives; Robinson Helicopter Company (RHC) Model R44 Helicopters |
Unsafe Condition
Fatigue crack originating from holes in the main rotor blade skin, starting at the mid-span inboard trim tab, running chordwise to the spar, and turning along the spar, which could result in main rotor blade failure and loss of control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect each main rotor blade for cracks every 5 hours time-in-service until replaced. Replace all affected main rotor blades with redesigned blades (P/N C016-2) prior to further flight after November 15, 1998.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to further flight after November 15, 1998
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Robinson Helicopter Company Model R44 helicopters, serial numbers 0002 through 0486, with main rotor blades part number C016-1 installed.
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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