AD 81-05-52 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Robinson Helicopter Company | R22 | Airworthiness Directives; ROBINSON HELICOPTER Model R-22 Helicopters |
Unsafe Condition
Coupling failure of the main gearbox input flex coupling yoke P/N A 194 could result in loss of power to the main rotor.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the main gearbox input flex coupling yoke P/N A 194 in accordance with SB-9, replace defective yokes with serviceable couplings from production lot 18 and subsequent or new inertia welded coupling P/N A 908-1, and conduct subsequent inspections at intervals not exceeding ten hours time in service.
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Compliance Time
Prior to further flight after receipt of telegraphic AD T81-05-52 or the effective date of this AD (April 13, 1981), whichever comes first.
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Affected Aircraft
Robinson Helicopter Company Model R-22 Helicopters, Serial Numbers 0002 through 0036, 0038 through 0061, 0064 through 0089, 0093 and 0095.
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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