AD T83-25-51 R1
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Columbia Helicopters, Inc. | 234 | Airworthiness Directives; BOEING VERTOL COMPANY Model 234 Series Helicopters |
Unsafe Condition
Cracking of the main rotor head horizontal hinge pins P/N's 114R2196-2, 114R2197-1, and 114R2197-5.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Retire main rotor head horizontal hinge pins with specified part numbers and replace with serviceable parts within the compliance time. An equivalent method may be used if approved by the Manager, New York Aircraft Certification Office. Flight is permitted to a base to accomplish AD requirements.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next 25 hours time in service from the effective date of this AD or before the accumulation of 1,600 hours time in service, whichever comes later. Additionally, within the next 50 hours time in service from the effective date of this AD revision or before the accumulation of 300 hours time in service, whichever comes later for pins with serial numbers outside specified ranges.
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Affected Aircraft
Boeing Vertol Model 234 series helicopters certificated in all categories.
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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