AD 64-04-04
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | Aeronautica Macchi S.p.A. | AL 60 | Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft |
| aircraft | Aeronautica Macchi S.p.A. | AL 60-B | Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft |
Unsafe Condition
Fuel selector valves have defective internal 'O' rings and a spring of insufficient strength, resulting in internal leaks when in the closed position.
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Required Actions
Inspect fuel selector valves for internal leaks by operating the engine at maximum r.p.m. on ground, setting the valve to off, and checking if the engine stops within 15 seconds. Replace defective valves before further flight with modified fuel selector valve 67106-1.
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Compliance Time
within the next 10 hours' time in service after the effective date of this AD
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Affected Aircraft
Macchi Models AL.60 (Serial Numbers 6/6148, 7/6149, 8/6150, 9/6154, 10/6155, 11/6156, 13/6158, 14/6159) and AL.60B (Serial Numbers 5/6147, 16/6161, 17/6162, 18/6163, 19/6164, 20/6165, 21/6166, 24/6169, 25/6170, 31/6211, 32/6212, 33/6213, 34/6214, 39/6219, 40/6220, 41/6221, 50/6230)
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Fuel Selector Valve
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_64-04-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-04-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft Subject: Fuel Selector Valve Status: Current Citation: Federal Register: February 8, 1964 Citation Publish Date: 02/08/1964 Effective Date: 03/09/1964 Make: Aeronautica Macchi S.p.A. Model: AL 60 | AL 60-B Product Type: Aircraft Product Subtype: Rotorcraft Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 64-04-04 CITATION: [Federal Register: February 8, 1964] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-04-04 SUBJECT HEADING: Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft ACTION: SUMMARY: DATES: Effective March 9, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-04-04 MACCHI: Amdt. 682 Part 507 Federal Register February 8, 1964. Applies to Aircraft Model AL.60 Serial Numbers 6/6148, 7/6149, 8/6150, 9/6154, 10/6155, 11/6156, 13/6158, 14/6159, and Model AL.60B Aircraft Serial Numbers 5/6147, 16/6161, 17/6162, 18/6163, 19/6164, 20/6165, 21/6166, 24/6169, 25/6170, 31/6211, 32/6212, 33/6213, 34/6214, 39/6219, 40/6220, 41/6221, 50/6230. Compliance required as indicated. Fuel selector valves in service have been found with defective internal "O" rings and a spring of insufficient strength. This has resulted in internal leaks through the fuel selector valve when in the closed position. (a) In order to determine whether an internal leak exists in the fuel selector valve make the following inspection within the next 10 hours' time in service after the effective date of this AD. (1) Operate the engine at maximum r.p.m. on ground. (2) Set the fuel selector valve to the off position. (3) If the engine does not stop within 15 seconds the fuel selector valve is defective and must be replaced, before further flight, with a modified fuel selector valve designated as 67106-1. (Macchi Service Bulletin No. 7 dated October 1, 1963, covers the same subject.) This directive effective March 9, 1964. FOOTER:
Document Text
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AD Final Rules - DRS_64-04-04.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 64-04-04 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft Subject: Fuel Selector Valve Status: Current Citation: Federal Register: February 8, 1964 Citation Publish Date: 02/08/1964 Effective Date: 03/09/1964 Make: Aeronautica Macchi S.p.A. Model: AL 60 | AL 60-B 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: 64-04-04 CITATION: [Federal Register: February 8, 1964] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 64-04-04 SUBJECT HEADING: Airworthiness Directives; Macchi Models AL.60 and AL.60B Aircraft ACTION: SUMMARY: DATES: Effective March 9, 1964. ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 64-04-04 MACCHI: Amdt. 682 Part 507 Federal Register February 8, 1964. Applies to Aircraft Model AL.60 Serial Numbers 6/6148, 7/6149, 8/6150, 9/6154, 10/6155, 11/6156, 13/6158, 14/6159, and Model AL.60B Aircraft Serial Numbers 5/6147, 16/6161, 17/6162, 18/6163, 19/6164, 20/6165, 21/6166, 24/6169, 25/6170, 31/6211, 32/6212, 33/6213, 34/6214, 39/6219, 40/6220, 41/6221, 50/6230. Compliance required as indicated. Fuel selector valves in service have been found with defective internal "O" rings and a spring of insufficient strength. This has resulted in internal leaks through the fuel selector valve when in the closed position. (a) In order to determine whether an internal leak exists in the fuel selector valve make the following inspection within the next 10 hours' time in service after the effective date of this AD. (1) Operate the engine at maximum r.p.m. on ground. (2) Set the fuel selector valve to the off position. (3) If the engine does not stop within 15 seconds the fuel selector valve is defective and must be replaced, before further flight, with a modified fuel selector valve designated as 67106-1. (Macchi Service Bulletin No. 7 dated October 1, 1963, covers the same subject.) This directive effective March 9, 1964. FOOTER:
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Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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