AD 61-08-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7 | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7B | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
| aircraft | The Boeing Company | DC-7C | Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes |
Unsafe Condition
Fuel transfer in flight can occur due to lack of antifuel transfer check valves in the fuel system, which may lead to improper fuel distribution and potential loss of engine power.
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Required Actions
Install a placard in the flight compartment stating 'Fuel Transfer in Flight Prohibited' and revise the FAA-approved airplane flight manual to incorporate fuel system operation procedures prohibiting fuel transfer in flight and deleting references to installed check valves.
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Compliance Time
within the next 330 hours' time in service
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Affected Aircraft
The Boeing Company DC-6, DC-6A, DC-6B, DC-7, DC-7B, DC-7C series airplanes which do not have antifuel transfer check valves installed in the fuel system.
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Federal Register Abstract
Fuel Transfer
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_61-08-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-08-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes Subject: Fuel Transfer Status: Current Citation: (Federal Register: April 8, 1961) Citation Publish Date: 04/08/1961 Effective Date: 05/09/1961 Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B | DC-7 | DC-7B | DC-7C Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 61-08-01 CITATION: [Federal Register: April 8, 1961] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-08-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes ACTION: SUMMARY: DATES: Effective May 9, 1961 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-08-01 DOUGLAS: Amdt. 273 Part 507 Federal Register April 8, 1961. Applies to All DC-6 and DC-7 Series Airplanes Which Do Not Have Antifuel Transfer Check Valves Installed In The Fuel System. Compliance required within the next 330 hours' time in service. (a) Install a placard in the flight compartment in full view of the pilot to read as follows: "Fuel Transfer in Flight Prohibited." (b) Revise the operations procedures section covering fuel system management in the FAA approved airplane flight manual to incorporate fuel system operation procedures in accordance with the above placard and delete the item which states that check valves are installed. Flight manual revisions must be approved by FAA. When check valves to prevent transfer of fuel are installed, this AD is no longer applicable. (Douglas Service Bulletin No. DC-6-294 dated November 19, 1948, revised February 17, 1950, covers an acceptable installation of check valves.) This directive effective May 9, 1961. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_61-08-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 61-08-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes Subject: Fuel Transfer Status: Current Citation: (Federal Register: April 8, 1961) Citation Publish Date: 04/08/1961 Effective Date: 05/09/1961 Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B | DC-7 | DC-7B | DC-7C Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 61-08-01 CITATION: [Federal Register: April 8, 1961] PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 61-08-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS All DC-6 and DC-7 Series Airplanes ACTION: SUMMARY: DATES: Effective May 9, 1961 ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 61-08-01 DOUGLAS: Amdt. 273 Part 507 Federal Register April 8, 1961. Applies to All DC-6 and DC-7 Series Airplanes Which Do Not Have Antifuel Transfer Check Valves Installed In The Fuel System. Compliance required within the next 330 hours' time in service. (a) Install a placard in the flight compartment in full view of the pilot to read as follows: "Fuel Transfer in Flight Prohibited." (b) Revise the operations procedures section covering fuel system management in the FAA approved airplane flight manual to incorporate fuel system operation procedures in accordance with the above placard and delete the item which states that check valves are installed. Flight manual revisions must be approved by FAA. When check valves to prevent transfer of fuel are installed, this AD is no longer applicable. (Douglas Service Bulletin No. DC-6-294 dated November 19, 1948, revised February 17, 1950, covers an acceptable installation of check valves.) This directive effective May 9, 1961. FOOTER:
Source: Official FAA Source ↗
Retrieved: Apr 8, 2026
Rights: U.S. Government Public Domain
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