AD 76-08-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Brantly International, Inc. | 305 | Airworthiness Directives; Brantly Model 305 Helicopters. |
Unsafe Condition
Failure of the main rotor hub clevis bearing or torsion strap assemblies P/N C0976-1, D2225-1, or ESJ 74837/36NBC2048YZP due to deterioration, roughness, or metallic particles in the grease residue could result in loss of main rotor control.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Replace Brantly torsion strap assemblies P/N C0976-1 or D2225-1 with P/N D2225-3 and replace main rotor hub clevis bearings P/N ESJ 74837 with serialized P/N ESJ 74837 or 36NBC2048YZP. Inspect clevis bearings every 50 hours' time in service for deterioration, roughness, or metallic particles, rotating them 180 degrees if acceptable, and retire after 100 hours' total service.
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Compliance Time
Prior to further flight after January 18, 1968, and thereafter at intervals not to exceed 50 hours' time in service.
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Affected Aircraft
Brantly International, Inc. Model 305 helicopters certificated in all categories.
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Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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