AD 83-18-51 R2
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 pitch shafts Part Numbers 114R2088-7, -14, -15, -16 could cause possible hazards in flight.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Conduct an eddy current inspection of the pitch shaft per Boeing Vertol Service Bulletin 234-64-1006, revise 2 or part 3. Repeat inspections at intervals not exceeding 15 hours time in service. Remove and replace cracked shafts before further flight. Replace pitch shafts P/N 114R2088-14/-16 within 25 hours or before 550 hours, and P/N 114R2088-7/-15 within 25 hours or before 700 hours time in service.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Prior to further flight for initial inspections and cracked shafts. Repeat inspections at intervals not exceeding 15 hours time in service. Replace specific P/N shafts within 25 hours time in service from AD effective date or prior to 550/700 hours time in service, whichever occurs later.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Boeing Vertol Model 234 series helicopters with main rotor head pitch shafts P/N 114R2088-7, -14, -15, -16.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Pitch Shafts
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_83-18-51_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-18-51 R2 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING VERTOL COMPANY Model 234 Series Helicopters Subject: Pitch Shafts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/31/1984 Make: Columbia Helicopters, Inc. Model: 234 Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 83-18-51 R2 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4862 AD NUMBER: 83-18-51 R2 SUBJECT HEADING: Airworthiness Directives; BOEING VERTOL COMPANY Model 234 Series Helicopters ACTION: SUMMARY: DATES: Effective May 31, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-18-51 R2 BOEING VERTOL COMPANY: Amendment 39-4862. Applies to Boeing Vertol Model 234 series helicopters certificated in all categories. Compliance is required as indicated. To prevent possible hazards in flight associated with cracking of the main rotor head pitch shafts, accomplish the following: (a) Unless already accomplished, prior to further flight on helicopters equipped with main rotor head pitch shafts Part Numbers (P/N) 114R2088-7, -14, -15, -16, conduct an eddy current inspection of the pitch shaft in accordance with the Accomplishment Instructions (Part 2) of Boeing Vertol Service Bulletin No. 234-64-1006, Revision 2, dated August 25, 1983, or (Part 3) of Service Bulletin No. 234-64-1006 dated January 16, 1984. (b) After the initial inspection of paragraph (a), repeat the inspection of paragraph (a) at intervals not to exceed 15 hours time in service. (c) Remove from service pitch shafts having a crack and replace with a serviceable part prior to further flight. (d) An equivalent method of compliance with this AD may be used when approved by the Manager, New York Aircraft Certification Office, 181 South Franklin Avenue, Valley Stream, New York 11581. (e) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Manager, New York Aircraft Certification Office, FAA, New England Region, may adjust the compliance times specified in this AD. (f) Within the next 25 hours time in service from the effective date of this AD or prior to the accumulation of 550 hours time in service, whichever occurs later, remove from service at main rotor head pitch shafts P/N's 114R2088-14 and -16 and replace with serviceable parts. (g) Within the next 25 hours time in service from the effective date of this AD or prior to the accumulation of 700 hours time in service, whichever occurs later, remove from service forward main rotor head pitch shafts P/N's 114R2088-7 and -15 and replace with serviceable parts. This amendment becomes effective May 31, 1984, as to all persons except those persons to whom it was made immediately effective by telegraphic AD's No. T83-18-51, issued September 2, 1983, and No. T83-18-51R1, issued October 28, 1983, which contained parts of this amendment. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_83-18-51_R.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 83-18-51 R2 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; BOEING VERTOL COMPANY Model 234 Series Helicopters Subject: Pitch Shafts Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 05/31/1984 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: 83-18-51 R2 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-4862 AD NUMBER: 83-18-51 R2 SUBJECT HEADING: Airworthiness Directives; BOEING VERTOL COMPANY Model 234 Series Helicopters ACTION: SUMMARY: DATES: Effective May 31, 1984. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 83-18-51 R2 BOEING VERTOL COMPANY: Amendment 39-4862. Applies to Boeing Vertol Model 234 series helicopters certificated in all categories. Compliance is required as indicated. To prevent possible hazards in flight associated with cracking of the main rotor head pitch shafts, accomplish the following: (a) Unless already accomplished, prior to further flight on helicopters equipped with main rotor head pitch shafts Part Numbers (P/N) 114R2088-7, -14, -15, -16, conduct an eddy current inspection of the pitch shaft in accordance with the Accomplishment Instructions (Part 2) of Boeing Vertol Service Bulletin No. 234-64-1006, Revision 2, dated August 25, 1983, or (Part 3) of Service Bulletin No. 234-64-1006 dated January 16, 1984. (b) After the initial inspection of paragraph (a), repeat the inspection of paragraph (a) at intervals not to exceed 15 hours time in service. (c) Remove from service pitch shafts having a crack and replace with a serviceable part prior to further flight. (d) An equivalent method of compliance with this AD may be used when approved by the Manager, New York Aircraft Certification Office, 181 South Franklin Avenue, Valley Stream, New York 11581. (e) Upon submission of substantiating data by an owner or operator through an FAA Maintenance Inspector, the Manager, New York Aircraft Certification Office, FAA, New England Region, may adjust the compliance times specified in this AD. (f) Within the next 25 hours time in service from the effective date of this AD or prior to the accumulation of 550 hours time in service, whichever occurs later, remove from service at main rotor head pitch shafts P/N's 114R2088-14 and -16 and replace with serviceable parts. (g) Within the next 25 hours time in service from the effective date of this AD or prior to the accumulation of 700 hours time in service, whichever occurs later, remove from service forward main rotor head pitch shafts P/N's 114R2088-7 and -15 and replace with serviceable parts. This amendment becomes effective May 31, 1984, as to all persons except those persons to whom it was made immediately effective by telegraphic AD's No. T83-18-51, issued September 2, 1983, and No. T83-18-51R1, issued October 28, 1983, which contained parts of this amendment. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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