AD Amdt-39-10029
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Hiller | Various | Airworthiness Directives; Hiller Aircraft Corporation Model UH- 12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H- 23C, H-23D, H-23F, HTE-1, HTE-2, and OH-23G Helicopters |
Unsafe Condition
Corrosion, cracks, elongation, burrs, pitting, or fretting of the bolt holes in the blade spar tube and cuff could lead to separation of the control rotor blade assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect the blade spar tube and cuff for corrosion, cracks, elongation, burrs, pitting, or fretting of the bolt holes. Repair or replace as necessary following specified inspection intervals.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified inspection intervals
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Hiller Aircraft Corporation Models UH-12, UH-12A, UH-12B, UH-12C, UH-12D, UH-12E, CH-112, H-23A, H-23B, H-23C, H-23D, H-23F, HTE-1, HTE-2, OH-23G, and UH-12D/UH-12E converted to turbine engine power via STC SH177WE/SH178WE with certain blade spar tubes or cuffs.
AI-generated summary from the source AD text. Verify against the official source before acting.
Source: Official FAA Source ↗
Retrieved: Apr 6, 2026
Rights: U.S. Government Public Domain
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