AD 64-06-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Schweizer Aircraft Corporation | 269A | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269A-1 | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
| aircraft | Schweizer Aircraft Corporation | 269B | Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters |
Unsafe Condition
Failure of the lower coupling drive shaft (Hughes P/N 269A5504) due to cracking at the radii of end splines, alinement collar, and boot mounting collar.
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Required Actions
Within 25 hours' time in service after the effective date, inspect the shaft via dye penetrant or magnetic particle inspection, focusing on specified areas. Replace any cracked shaft before further flight. Within 500 hours' time in service but before 1,500 total hours on the part, replace the shaft with P/N 269A5504-3.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the specified timeframes: 25 hours' time in service for initial inspection, 500 hours' time in service for replacement, not exceeding 1,500 total hours on the part.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
Schweizer Aircraft Corporation Models 269A (Serial Numbers 0011-0314), 269A-1 (Serial Numbers 0001-0007), and 269B (Serial Numbers 0001-0079).
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Lower Coupling Drive Shaft
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_64-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-06-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters Subject: Lower Coupling Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/18/1964 Make: Schweizer Aircraft Corporation Model: 269A | 269A-1 | 269B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 64-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-06-04 SUBJECT HEADING: Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters ACTION: SUMMARY: DATES: Effective March 18, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-06-04 HUGHES: Amdt. 706 Part 507 Federal Register March 18, 1964. Applies to Model 269A Helicopters, Serial Numbers 0011 to 0314 Inclusive, Model 269A-1 Helicopters, Serial Numbers 0001 to 0007 Inclusive, and Model 269B Helicopters, Serial Numbers 0001 to 0079 Inclusive. Compliance required as indicated. As a result of several recent failures of the lower coupling drive shaft (Hughes P/N 269A5504) accomplish the following: (a) Within 25 hours' time in service after the effective date of this AD, unless already accomplished within the last 75 hours' time in service, and every 100 hours' time in service thereafter from the last inspection until accomplishment of (b), remove the lower coupling drive shaft and conduct a dye penetrant or magnetic particle inspection of the shaft. Pay particular attention to the radii at the end splines, alinement collar and boot mounting collar. Replace any shaft exhibiting evidence of cracking before further flight. (b) Within 500 hours' time in service after the effective date of this AD but not to exceed 1,500 hours total time in service on the part, replace the lower coupling drive shaft P/N 269A5504, with a shaft P/N 269A5504-3. (Hughes Service Information Notices Nos. 2A-33(269A), 2A-1-01(269A-1) and 2B- 01(269B), all dated February 18, 1964, cover this same subject.) This directive effective March 18, 1964. FOOTER:
Document Text
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AD Final Rules - DRS_64-06-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-06-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters Subject: Lower Coupling Drive Shaft Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/18/1964 Make: Schweizer Aircraft Corporation Model: 269A | 269A-1 | 269B 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: 64-06-04 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-06-04 SUBJECT HEADING: Airworthiness Directives; Hughes Models 269A, 269A-1, and 269B Helicopters ACTION: SUMMARY: DATES: Effective March 18, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-06-04 HUGHES: Amdt. 706 Part 507 Federal Register March 18, 1964. Applies to Model 269A Helicopters, Serial Numbers 0011 to 0314 Inclusive, Model 269A-1 Helicopters, Serial Numbers 0001 to 0007 Inclusive, and Model 269B Helicopters, Serial Numbers 0001 to 0079 Inclusive. Compliance required as indicated. As a result of several recent failures of the lower coupling drive shaft (Hughes P/N 269A5504) accomplish the following: (a) Within 25 hours' time in service after the effective date of this AD, unless already accomplished within the last 75 hours' time in service, and every 100 hours' time in service thereafter from the last inspection until accomplishment of (b), remove the lower coupling drive shaft and conduct a dye penetrant or magnetic particle inspection of the shaft. Pay particular attention to the radii at the end splines, alinement collar and boot mounting collar. Replace any shaft exhibiting evidence of cracking before further flight. (b) Within 500 hours' time in service after the effective date of this AD but not to exceed 1,500 hours total time in service on the part, replace the lower coupling drive shaft P/N 269A5504, with a shaft P/N 269A5504-3. (Hughes Service Information Notices Nos. 2A-33(269A), 2A-1-01(269A-1) and 2B- 01(269B), all dated February 18, 1964, cover this same subject.) This directive effective March 18, 1964. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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