AD 69-23-06
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| engine | Pratt & Whitney Canada Corp. | PT6A-20 | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-27 | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-28 | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-6 | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-6A | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6A-6B | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
| engine | Pratt & Whitney Canada Corp. | PT6B-9 | UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines |
Unsafe Condition
Disengagement of the fuel pump input coupling from the engine gearbox
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Required Actions
Remove retaining ring Pesco P/N 99-4660 and install new snap ring Pesco P/N 99-4906
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Compliance Time
within 50 hours after the effective date of this Airworthiness Directive unless already accomplished
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Affected Aircraft
PT6A-6, -6A, -6B, PT6B-9 all engines; PT6A-20 prior to S/N PC-E22480; PT6A-27 prior to S/N PC-E40311; PT6A-28 prior to S/N PC-E50054 except 50051, 50052
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Federal Register Abstract
Fuel Pumps
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_69-23-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 69-23-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines Subject: Fuel Pumps Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/15/1969 Make: Pratt & Whitney Canada Corp. Model: PT6A-20 | PT6A-27 | PT6A-28 | PT6A-6 | PT6A-6A | PT6A-6B | PT6B-9 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 69-23-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-874 AD NUMBER: 69-23-06 SUBJECT HEADING: UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines ACTION: SUMMARY: DATES: Effective November 15, 1969. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 69-23-06 UNITED AIRCRAFT OF CANADA, LIMITED: Amdt. 39-874. Applies to PT6 model series engines equipped with Pesco Model 024-800 fuel pumps as follows: PT6A-6, -6A, -6B, PT6B-9 all engines PT6A-20 prior to S/N PC-E22480 PT6A-27 prior to S/N PC-E40311 PT6A-28 prior to S/N PC-E50054 except 50051, 50052 Compliance within 50 hours after the effective date of this Airworthiness Directive unless already accomplished. To prevent disengagement of the fuel pump input coupling from the engine gearbox, remove retaining ring, Pesco P/N 99-4660 and install new snap ring Pesco P/N 99-4906. United Aircraft of Canada Ltd. Service Bulletin No. 174 pertains to this subject. This amendment is effective November 15, 1969. FOOTER:
Document Text
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AD Final Rules - DRS_69-23-06.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 69-23-06 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines Subject: Fuel Pumps Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 11/15/1969 Make: Pratt & Whitney Canada Corp. Model: PT6A-20 | PT6A-27 | PT6A-28 | PT6A-6 | PT6A-6A | PT6A-6B | PT6B-9 Product Type: Engine Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: Updated RGL applicability to match AD applicability; CAR C-11-185 AIRWORTHINESS DIRECTIVES FINAL RULES: 69-23-06 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-874 AD NUMBER: 69-23-06 SUBJECT HEADING: UNITED AIRCRAFT OF CANADA, LIMITED Model PT6 Series Engines ACTION: SUMMARY: DATES: Effective November 15, 1969. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 69-23-06 UNITED AIRCRAFT OF CANADA, LIMITED: Amdt. 39-874. Applies to PT6 model series engines equipped with Pesco Model 024-800 fuel pumps as follows: PT6A-6, -6A, -6B, PT6B-9 all engines PT6A-20 prior to S/N PC-E22480 PT6A-27 prior to S/N PC-E40311 PT6A-28 prior to S/N PC-E50054 except 50051, 50052 Compliance within 50 hours after the effective date of this Airworthiness Directive unless already accomplished. To prevent disengagement of the fuel pump input coupling from the engine gearbox, remove retaining ring, Pesco P/N 99-4660 and install new snap ring Pesco P/N 99-4906. United Aircraft of Canada Ltd. Service Bulletin No. 174 pertains to this subject. This amendment is effective November 15, 1969. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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