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.
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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.
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Compliance Time
prior to further flight, after the effective date of this AD
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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.
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Federal Register Abstract
Transmission
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_82-20-52.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-20-52 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING VERTOL Model 234 Series Helicopters Subject: Transmission Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/04/1983 Make: Columbia Helicopters, Inc. Model: 234 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 82-20-52 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4480 AD NUMBER: 82-20-52 SUBJECT HEADING: Airworthiness Directives; BOEING VERTOL Model 234 Series Helicopters ACTION: SUMMARY: DATES: Effective April 4, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-20-52 BOEING VERTOL: Amendment 39-4480. Applies to Boeing Vertol Model 234 series helicopters, Manufacturer's Serial Numbers MJ001 through MJ006, equipped with forward transmission, P/N 234D1200-2, aft transmission, P/N 234D2200-2M, and combiner transmission, P/N 234D5200-5, certificated in all categories. Compliance is required prior to further flight, after the effective date of this AD, unless already accomplished. To prevent possible hazards in flight associated with transmission drive component failure, due to lubrication system contamination, accomplish the following: a. Remove the forward transmission, aft transmission and combiner transmission, disassemble, inspect and repair in accordance with the accomplishment instructions of Boeing Vertol Bulletin 234-65-1027, Revision 2 contained in Boeing Vertol TWX Nos. 8-1420-3-4264, - 4267, and 4273, respectively dated September 23, 24, and 25, 1982, or FAA approved equivalent. b. An equivalent method of compliance with this AD must be approved by the New York Aircraft Certification Office, FAA, New England Region, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581. This amendment becomes effective November 5, 1982. FOOTER:
Document Text
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AD Final Rules - DRS_82-20-52.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 82-20-52 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING VERTOL Model 234 Series Helicopters Subject: Transmission Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 04/04/1983 Make: Columbia Helicopters, Inc. Model: 234 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 82-20-52 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4480 AD NUMBER: 82-20-52 SUBJECT HEADING: Airworthiness Directives; BOEING VERTOL Model 234 Series Helicopters ACTION: SUMMARY: DATES: Effective April 4, 1983. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 82-20-52 BOEING VERTOL: Amendment 39-4480. Applies to Boeing Vertol Model 234 series helicopters, Manufacturer's Serial Numbers MJ001 through MJ006, equipped with forward transmission, P/N 234D1200-2, aft transmission, P/N 234D2200-2M, and combiner transmission, P/N 234D5200-5, certificated in all categories. Compliance is required prior to further flight, after the effective date of this AD, unless already accomplished. To prevent possible hazards in flight associated with transmission drive component failure, due to lubrication system contamination, accomplish the following: a. Remove the forward transmission, aft transmission and combiner transmission, disassemble, inspect and repair in accordance with the accomplishment instructions of Boeing Vertol Bulletin 234-65-1027, Revision 2 contained in Boeing Vertol TWX Nos. 8-1420-3-4264, - 4267, and 4273, respectively dated September 23, 24, and 25, 1982, or FAA approved equivalent. b. An equivalent method of compliance with this AD must be approved by the New York Aircraft Certification Office, FAA, New England Region, 181 South Franklin Avenue, Room 202, Valley Stream, New York 11581. This amendment becomes effective November 5, 1982. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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