AD 76-05-03
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | United Aircraft of Canada | Auxiliary Power Unit | Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 |
| appliance | United Aircraft of Canada | Auxiliary Power Unit | Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 |
Unsafe Condition
Leakage of the Sundstrand Aviation 025277 series fuel pump without the part number 5002557 injector cap and screen assembly.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect fuel pumps with less than 250 hours time in service since new using Pratt & Whitney of Canada Limited Alert Service Bulletin No. 9046. Install part number 5002557 injector cap and screen assembly per Pratt & Whitney Aircraft of Canada Limited Service Bulletin No. 9043.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
Within the next twenty hours in service after the effective date of this AD for inspections, and within the next 250 hours in service after the effective date of this AD for installations.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
United Aircraft of Canada Limited Auxiliary Power Unit Model ST6L-73 with Sundstrand Aviation 025277 series fuel pumps.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Auxiliary Power Unit
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_76-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 Subject: Auxiliary Power Unit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/09/1976 Make: United Aircraft of Canada Model: Auxiliary Power Unit Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-05-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2535 AD NUMBER: 76-05-03 SUBJECT HEADING: Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 ACTION: SUMMARY: DATES: Effective March 9, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-05-03 UNITED AIRCRAFT OF CANADA LIMITED: Amendment 39-2535. Auxiliary Power Unit Model ST6L-73. Compliance required as indicated unless previously accomplished. To preclude leakage of the Sundstrand Aviation 025277 series fuel pump without the part number 5002557 injector cap and screen assembly, accomplish the following: (a) Within the next twenty hours in service after the effective date of this AD, unless previously accomplished, inspect all fuel pumps with less than 250 hours time in service since new in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney of Canada Limited Alert Service Bulletin No. 9046 dated August 19, 1975, or approved equivalent inspection. (b) Within the next 250 hours in service after the effective date of this AD, unless previously accomplished, install part number 5002557, injector cap and screen assembly, in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney Aircraft of Canada Limited Service Bulletin No. 9043, dated September 2, 1975, or approved equivalent instructions. The aircraft may be flown in accordance with FAR 21.197 to a base where the alteration or inspection can be performed. An equivalent alteration or inspection must be approved by the Chief, Engineering and Manufacturing Branch, of the Eastern Region of the FAA. This amendment is effective March 9, 1976. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_76-05-03.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 76-05-03 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 Subject: Auxiliary Power Unit Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: 03/09/1976 Make: United Aircraft of Canada Model: Auxiliary Power Unit Product Type: Appliance Product Subtype: Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 76-05-03 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: 39-2535 AD NUMBER: 76-05-03 SUBJECT HEADING: Airworthiness Directives; UNITED AIRCRAFT OF CANADA LIMITED: Auxiliary Power Unit Model ST6L-73 ACTION: SUMMARY: DATES: Effective March 9, 1976. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 76-05-03 UNITED AIRCRAFT OF CANADA LIMITED: Amendment 39-2535. Auxiliary Power Unit Model ST6L-73. Compliance required as indicated unless previously accomplished. To preclude leakage of the Sundstrand Aviation 025277 series fuel pump without the part number 5002557 injector cap and screen assembly, accomplish the following: (a) Within the next twenty hours in service after the effective date of this AD, unless previously accomplished, inspect all fuel pumps with less than 250 hours time in service since new in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney of Canada Limited Alert Service Bulletin No. 9046 dated August 19, 1975, or approved equivalent inspection. (b) Within the next 250 hours in service after the effective date of this AD, unless previously accomplished, install part number 5002557, injector cap and screen assembly, in accordance with paragraph 2, Accomplishment Instructions of Pratt & Whitney Aircraft of Canada Limited Service Bulletin No. 9043, dated September 2, 1975, or approved equivalent instructions. The aircraft may be flown in accordance with FAR 21.197 to a base where the alteration or inspection can be performed. An equivalent alteration or inspection must be approved by the Chief, Engineering and Manufacturing Branch, of the Eastern Region of the FAA. This amendment is effective March 9, 1976. FOOTER:
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Retrieved: Apr 8, 2026
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