AD 98-05-10
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson Helicopter Company | R44 | Airworthiness Directives; Robinson Helicopter Company Model R44 Helicopters |
Unsafe Condition
Failure of either the 45 degree or 90 degree aluminum elbows that connect the oil lines from the oil cooler to the engine accessory case, which would cause loss of engine oil, resulting in an engine failure and a subsequent forced landing.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove aluminum AN823-8D (45 degree) or MS20822-8D (90 degree) elbows connecting the A723 oil cooler lines to the engine accessory case and replace them with steel MS20823-8 (45 degree) or MS20822-8 (90 degree) elbows. Apply B270-6 thread sealant/lubricant to the replacement elbows' pipe threads and torque to 160 in-lbs plus additional torque for alignment.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
within 50 hours time-in-service after the effective date of this AD
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Affected Aircraft
Robinson Helicopter Company Model R44 helicopters, serial numbers 0001 through 0330
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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