AD 82-20-52
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Columbia Helicopters, Inc. | 234 | Airworthiness Directives; BOEING VERTOL Model 234 Series Helicopters |
Unsafe Condition
Transmission drive component failure due to lubrication system contamination.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Remove, disassemble, inspect, and repair the forward transmission, aft transmission, and combiner transmission in accordance with Boeing Vertol Bulletin 234-65-1027, Revision 2, or FAA approved equivalent. Equivalent compliance methods must be approved by the New York Aircraft Certification Office.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to further flight, after the effective date of this AD
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Vertol Model 234 series helicopters, Manufacturer's Serial Numbers MJ001 through MJ006, equipped with specific transmissions: forward transmission P/N 234D1200-2, aft transmission P/N 234D2200-2M, and combiner transmission P/N 234D5200-5.
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
This site is not affiliated with or endorsed by the FAA. Always verify with official sources.