AD 48-10-01
final rule
Applicability
| Type | Manufacturer | Model | Details |
|---|---|---|---|
| aircraft | The Boeing Company | DC-6 | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6A | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
| aircraft | The Boeing Company | DC-6B | Airworthiness Directives; DOUGLAS DC-6 Aircraft |
Unsafe Condition
Failure of the cabin heater fuel system components, such as the fuel pressure regulator diaphragms, fuel pump check valve, or fire extinguishing systems, could lead to fuel leakage or fire hazards during Class A operations with cabin supercharging and thermal deicing active.
AI-generated summary from the source AD text. Verify against the official source before acting.
Required Actions
Inspect and rework cabin heater fuel system components per specified Douglas Service Bulletins, disconnect and block fuel lines to the cabin heater, revise the Airplane Flight Manual with FAA-approved procedures, and ensure compliance with fire protection modifications.
AI-generated summary from the source AD text. Verify against the official source before acting.
Compliance Time
prior to return to service in class A operation-with cabin supercharging and thermal deicing operative (with the exception of heat windshield deicing) and with cabin heaters inoperative.
AI-generated summary from the source AD text. Verify against the official source before acting.
Affected Aircraft
The Boeing Company DC-6, DC-6A, DC-6B aircraft as specified in the referenced Service Bulletins, with serial numbers listed on the pertinent Service Bulletins.
AI-generated summary from the source AD text. Verify against the official source before acting.
Federal Register Abstract
Ungrounding Modification - Class A
Applicability Source Text
Show captured applicability text from the source AD
AD Final Rules - DRS_48-10-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-10-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Aircraft Subject: Ungrounding Modification - Class A Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B Product Type: Aircraft Product Subtype: Large Airplane Affected AD: Superseded AD: Affected By: Superseded By: Service/Office: Office of Primary Responsibility: CFR Part Reference: Part 39 Comments: AIRWORTHINESS DIRECTIVES FINAL RULES: 48-10-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-10-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-10-01 DOUGLAS: Applies to DC-6 Aircraft. To be accomplished prior to return to service in class A operation-with cabin supercharging and thermal deicing operative (with the exception of heat windshield deicing) and with cabin heaters inoperative. Rework must be accomplished in accordance with the following Douglas Co. data: Service Bulletin DC-6 No. 204A. Procedure for Disconnecting No. 2 and No. 3 Alternate Fuel Cells, dated December 18, 1947, or Service Bulletin DC-6 No. 204B, Fuel Tank Vent System Revision, as revised February 19, 1948. Service Bulletin DC-6 No. 200, Revised Heater Fuel Pressure Regulator Diaphragms, as revised February 26, 1948. Service Bulletin DC-6 No. 201, Removal-Heater Fuel Pressure Regulator Static Balance Lines, dated December 6, 1947. Service Bulletin DC-6 No. 202, Heater Fuel Pump Check Valve-Rework, dated December 9, 1947. Service Bulletin DC-6 No. 208, Cabin Heater and De-icer Fuel System Revision, as revised February 20, 1948. Service Bulletin DC-6 No. 226, section I of V, Fire Extinguisher System for Boiler Room, as revised February 19, 1948. Service Bulletin DC-6 No. 226, section II of V, CO2 Piping, as revised February 21, 1948. Service Bulletin DC-6 No. 226, section III of V, Installation Fire Detector Boxes and Conduit, dated February 12, 1948. Except that fire detectors in the under floor cargo compartments are not required since these compartments have been determined to comply with CAR 4b.383(d) requirements for Class "D" compartments when they otherwise comply with this Airworthiness Directive. Service Bulletin DC-6 No. 226, section IV of V, Electrical Rework, as revised Feb. 26, 1948. Service Bulletin DC-6 No. 226, section V of V, Sealing of Forward and Aft Baggage Compartment and Invertor Compartment Blower Duct, as revised February 24, 1948. Service Bulletin DC-6 No. 233, Fuel Overboard Drains for Wing Nose Area, dated January 14, 1948. Service Bulletin DC-6 No. 247, Drainage Holes and Dams for Fuselage and Wings, as revised February 18, 1948. Service Bulletin DC-6 No. 252, Heater Exhaust Louver Removal, as revised February 17, 1948. Service Bulletin DC-6 No. 262, Installation of Combustion Heater Backfire Switches dated February 24, 1948. Superchargers with No. 7357594 stamped on gearbox housing and 5357091 stamped on the impeller housing (scroll) are satisfactory for A operation. These superchargers will be eligible for either A or C operation when reworked and identified as shown in Douglas Service Bulletin DC-6 No. 258. Service Bulletin DC-6 No. 225, Alcohol Windshield De-icing System, as revised February 24, 1948. Service Bulletin DC-6 No. 246, Relocation of Manual and Automatic Pressure Relief Valve, as revised February 17, 1948. Service Bulletin No. 224 canceled October 4, 1961. Service Bulletin DC-6 No. 217, Installation of Fire Axe, as revised Dec. 23, 1947. Service Bulletin DC-6 No. 214, Modification of Main Junction Box and Annex, as revised February 16, 1948. Service Bulletin DC-6 No. 230, Rerouting of Heater Accessory Compartment Power Cables, as revised February 16, 1948. Service Bulletin DC-6 No. 149, Fuse Protection for Flight Instrument Transformers, dated December 5, 1947. Service Bulletin DC-6 No. 237, Addition of Fuse on Master Switch for Buffet, as revised February 21, 1948. Service Bulletin DC-6 No. 248, Conduit Clipping to Combustible Fluid Lines, as revised February 13, 1948, and Addendum dated February 13, 1948. Service Bulletin DC-6 No. 212, protective Shield at Forward and AFT Cargo Compartment Lights, as revised January 7, 1948. Service Bulletin DC-6 No. 206, Rework of Battery Leads to Prevent Shorting, dated December 9, 1947. Service Bulletin DC-6 No. 218, Addition of Phenolic Sheet Insulation to AC Circuit Breaker Guard Assembly, dated December 17, 1947. Service Bulletin DC-6 No. 221, Revision of Heater Fire Extinguisher Buttons, dated December 20, 1947. Service Bulletin DC-6 No. 210, Protection for Outer Wing Booster Pump Lead-In, as revised December 22, 1947. Service Bulletin DC-6 No. 213, Starter and Generator Power Cable in Wing, as revised December 19, 1947. Service Bulletin DC-6 No. 242, Relocation of Tail Heater Control Can, as revised February 17, 1948. Service Bulletin DC-6 No. 203, Hand Fire Extinguisher Support Bracket Revision, as revised February 17, 1948. Service Bulletin DC-6 No. 260, Installation of AAL Type Master Switch Arrangement and Emergency Inverter, as revised February 24, 1948. (This installation not required on aircraft incorporating one set of vacuum operated flight instruments.) Service Bulletin DC-6 No. 267, Installation Heater Safety Relays, dated February 27, 1948. Service Bulletin DC-6 No. 205, Rework of DC-6 Fuel Tank and Cell Vent Chambers, as revised February 23, 1948. Service Bulletin DC-6 No. 207, Guard for Fuel Booster Pump Switches, as revised December 19, 1947. Service Bulletin DC-6 No. 253, Fireproofing of Wing De-icer Ducts in Nacelles, as revised February 24, 1948. Service Bulletin DC-6 No. 219, Rework of Whittaker Firewall Shut-Off Valves, dated December 19, 1947. Service Bulletin DC-6 No. 114, Fuel Flow Transmitter Line Replacement, dated October 29, 1947. Service Bulletin DC-6 No. 261, Installation of Oil Separator for Vacuum Pump Drain Lines, dated February 25, 1948. Service Bulletin DC-6 No. 249, Boiler Room Duct Revision, dated February 24, 1948. Service Bulletin DC-6 No. 232, Wing Heater Exhaust Insulation Cover, as revised February 16, 1948. Service Bulletin DC-6 No. 234, Tail Heater Ground Blower Check Valve Revision, as revised January 23, 1948. The rework outlined in the data listed above is based upon an airplane which incorporates certain production changes. Therefore, in order to satisfactorily complete the required rework, some aircraft* must also be revised in accordance with the following: Service Bulletin DC-6 No. 62, Rework-Cabin Pressure Control Valve Linkage, dated September 2, 1947. Service Bulletin DC-6 No. 111, Cabin Heater Fire Extinguisher Bottle, dated October 22, 1947. (Partial accomplishment only is required, which is to include: Support No. 5333704-10, Pipe No. 5332568-518 and attaching parts.) Service Bulletin DC-6 No. 119, Aft Baggage Compartment Smoke Detector Pick-up Pipe Revision, dated December 6, 1947. (To be accomplished only if Modification Item 59 has not been accomplished.) Service Bulletin DC-6 No. 16, installation of Additional Dams and Drain Plug in Fuselage Bottom, dated June 26, 1947. Service Bulletin DC-6 No. 161, Rear Lounge Hot Air Supply Duct Sound Trap Installation, dated January 30, 1948. (Need not be accomplished on Serial Nos. 42854 through 42891, 43000 through 43009, 43055, and 43061 until Service Bulletin DC-6 No. 59, Improved Aft Lounge Heating, dated September 16,1947, has been accomplished.) Service Bulletin DC-6 No. 95, Revision-Ground Blower Duct and Check Valve and Air Duct Connection Improvement, dated October 21, 1947. (Accomplish portion covered by Service Change No. 354 and that portion of Service Change No. 358 which includes cable assemblies 1342327-502 and -504, hook No. 1342315, latch assembly 1342314, AN 960-10L, washers, AN 486-4 clevis, AN 393-11 and -13 pins, AN 380-2-2 cotters and AN 365-428 nuts.) In addition to the above, the following must also be accomplished on all aircraft: 1. Inspect the wing structure around the fuel tanks in accordance with Douglas Service Letter to all Operators dated December 29, 1947 (ref. A214TS-2521/SRD 529.37). Any damage found as a result of the inspection must be satisfactorily repaired. 2. The Airplane Flight Manual for each airplane must be revised to include FAA-approved procedures covering "Fuel Usage," "Fire Fighting" and "Smoke Evacuation from the Cockpit." This information, pages 1 and 2 of Section I, and pages 31 through 65 of Section III, as revised February 26, 1948, for aircraft incorporating Hamilton Standard Propellers, or pages 1 and 2 of Section I, and pages 31 through 71 of Section III, as revised February 26, 1948, for aircraft incorporating Curtiss Propellers, should be obtained from the Douglas Co. 3. Disconnect the cabin heater electrically and block off all fuel lines to this heater. Revised October 4, 1961. *Serial numbers of airplanes affected by this rework are listed on the pertinent Service Bulletin(s). Also, additional information may be obtained from the "Supplement" to "Cross Reference List-Service Changes and Modification Items" which has been prepared and revised by the Douglas Co. as of February 11 1948. FOOTER:
Document Text
Show stored source text (verify against official source)
AD Final Rules - DRS_48-10-01.html Copy URL Print/Save as PDF Document Versions Feedback Details AD Number: 48-10-01 Document Type: AD Final Rules Docket Number: Unknown Subject Heading: Airworthiness Directives; DOUGLAS DC-6 Aircraft Subject: Ungrounding Modification - Class A Status: Current Citation: This information is not available. Citation Publish Date: Effective Date: Make: The Boeing Company Model: DC-6 | DC-6A | DC-6B 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: 48-10-01 CITATION: This information is not available. PAGE NUMBER: DOCKET NUMBER: Unknown AMENDMENT: AD NUMBER: 48-10-01 SUBJECT HEADING: Airworthiness Directives; DOUGLAS DC-6 Aircraft ACTION: SUMMARY: DATES: ADDRESSES: FOR FURTHER INFORMATION CONTACT: SUPPLEMENTARY INFORMATION: REGULATORY TEXT: 48-10-01 DOUGLAS: Applies to DC-6 Aircraft. To be accomplished prior to return to service in class A operation-with cabin supercharging and thermal deicing operative (with the exception of heat windshield deicing) and with cabin heaters inoperative. Rework must be accomplished in accordance with the following Douglas Co. data: Service Bulletin DC-6 No. 204A. Procedure for Disconnecting No. 2 and No. 3 Alternate Fuel Cells, dated December 18, 1947, or Service Bulletin DC-6 No. 204B, Fuel Tank Vent System Revision, as revised February 19, 1948. Service Bulletin DC-6 No. 200, Revised Heater Fuel Pressure Regulator Diaphragms, as revised February 26, 1948. Service Bulletin DC-6 No. 201, Removal-Heater Fuel Pressure Regulator Static Balance Lines, dated December 6, 1947. Service Bulletin DC-6 No. 202, Heater Fuel Pump Check Valve-Rework, dated December 9, 1947. Service Bulletin DC-6 No. 208, Cabin Heater and De-icer Fuel System Revision, as revised February 20, 1948. Service Bulletin DC-6 No. 226, section I of V, Fire Extinguisher System for Boiler Room, as revised February 19, 1948. Service Bulletin DC-6 No. 226, section II of V, CO2 Piping, as revised February 21, 1948. Service Bulletin DC-6 No. 226, section III of V, Installation Fire Detector Boxes and Conduit, dated February 12, 1948. Except that fire detectors in the under floor cargo compartments are not required since these compartments have been determined to comply with CAR 4b.383(d) requirements for Class "D" compartments when they otherwise comply with this Airworthiness Directive. Service Bulletin DC-6 No. 226, section IV of V, Electrical Rework, as revised Feb. 26, 1948. Service Bulletin DC-6 No. 226, section V of V, Sealing of Forward and Aft Baggage Compartment and Invertor Compartment Blower Duct, as revised February 24, 1948. Service Bulletin DC-6 No. 233, Fuel Overboard Drains for Wing Nose Area, dated January 14, 1948. Service Bulletin DC-6 No. 247, Drainage Holes and Dams for Fuselage and Wings, as revised February 18, 1948. Service Bulletin DC-6 No. 252, Heater Exhaust Louver Removal, as revised February 17, 1948. Service Bulletin DC-6 No. 262, Installation of Combustion Heater Backfire Switches dated February 24, 1948. Superchargers with No. 7357594 stamped on gearbox housing and 5357091 stamped on the impeller housing (scroll) are satisfactory for A operation. These superchargers will be eligible for either A or C operation when reworked and identified as shown in Douglas Service Bulletin DC-6 No. 258. Service Bulletin DC-6 No. 225, Alcohol Windshield De-icing System, as revised February 24, 1948. Service Bulletin DC-6 No. 246, Relocation of Manual and Automatic Pressure Relief Valve, as revised February 17, 1948. Service Bulletin No. 224 canceled October 4, 1961. Service Bulletin DC-6 No. 217, Installation of Fire Axe, as revised Dec. 23, 1947. Service Bulletin DC-6 No. 214, Modification of Main Junction Box and Annex, as revised February 16, 1948. Service Bulletin DC-6 No. 230, Rerouting of Heater Accessory Compartment Power Cables, as revised February 16, 1948. Service Bulletin DC-6 No. 149, Fuse Protection for Flight Instrument Transformers, dated December 5, 1947. Service Bulletin DC-6 No. 237, Addition of Fuse on Master Switch for Buffet, as revised February 21, 1948. Service Bulletin DC-6 No. 248, Conduit Clipping to Combustible Fluid Lines, as revised February 13, 1948, and Addendum dated February 13, 1948. Service Bulletin DC-6 No. 212, protective Shield at Forward and AFT Cargo Compartment Lights, as revised January 7, 1948. Service Bulletin DC-6 No. 206, Rework of Battery Leads to Prevent Shorting, dated December 9, 1947. Service Bulletin DC-6 No. 218, Addition of Phenolic Sheet Insulation to AC Circuit Breaker Guard Assembly, dated December 17, 1947. Service Bulletin DC-6 No. 221, Revision of Heater Fire Extinguisher Buttons, dated December 20, 1947. Service Bulletin DC-6 No. 210, Protection for Outer Wing Booster Pump Lead-In, as revised December 22, 1947. Service Bulletin DC-6 No. 213, Starter and Generator Power Cable in Wing, as revised December 19, 1947. Service Bulletin DC-6 No. 242, Relocation of Tail Heater Control Can, as revised February 17, 1948. Service Bulletin DC-6 No. 203, Hand Fire Extinguisher Support Bracket Revision, as revised February 17, 1948. Service Bulletin DC-6 No. 260, Installation of AAL Type Master Switch Arrangement and Emergency Inverter, as revised February 24, 1948. (This installation not required on aircraft incorporating one set of vacuum operated flight instruments.) Service Bulletin DC-6 No. 267, Installation Heater Safety Relays, dated February 27, 1948. Service Bulletin DC-6 No. 205, Rework of DC-6 Fuel Tank and Cell Vent Chambers, as revised February 23, 1948. Service Bulletin DC-6 No. 207, Guard for Fuel Booster Pump Switches, as revised December 19, 1947. Service Bulletin DC-6 No. 253, Fireproofing of Wing De-icer Ducts in Nacelles, as revised February 24, 1948. Service Bulletin DC-6 No. 219, Rework of Whittaker Firewall Shut-Off Valves, dated December 19, 1947. Service Bulletin DC-6 No. 114, Fuel Flow Transmitter Line Replacement, dated October 29, 1947. Service Bulletin DC-6 No. 261, Installation of Oil Separator for Vacuum Pump Drain Lines, dated February 25, 1948. Service Bulletin DC-6 No. 249, Boiler Room Duct Revision, dated February 24, 1948. Service Bulletin DC-6 No. 232, Wing Heater Exhaust Insulation Cover, as revised February 16, 1948. Service Bulletin DC-6 No. 234, Tail Heater Ground Blower Check Valve Revision, as revised January 23, 1948. The rework outlined in the data listed above is based upon an airplane which incorporates certain production changes. Therefore, in order to satisfactorily complete the required rework, some aircraft* must also be revised in accordance with the following: Service Bulletin DC-6 No. 62, Rework-Cabin Pressure Control Valve Linkage, dated September 2, 1947. Service Bulletin DC-6 No. 111, Cabin Heater Fire Extinguisher Bottle, dated October 22, 1947. (Partial accomplishment only is required, which is to include: Support No. 5333704-10, Pipe No. 5332568-518 and attaching parts.) Service Bulletin DC-6 No. 119, Aft Baggage Compartment Smoke Detector Pick-up Pipe Revision, dated December 6, 1947. (To be accomplished only if Modification Item 59 has not been accomplished.) Service Bulletin DC-6 No. 16, installation of Additional Dams and Drain Plug in Fuselage Bottom, dated June 26, 1947. Service Bulletin DC-6 No. 161, Rear Lounge Hot Air Supply Duct Sound Trap Installation, dated January 30, 1948. (Need not be accomplished on Serial Nos. 42854 through 42891, 43000 through 43009, 43055, and 43061 until Service Bulletin DC-6 No. 59, Improved Aft Lounge Heating, dated September 16,1947, has been accomplished.) Service Bulletin DC-6 No. 95, Revision-Ground Blower Duct and Check Valve and Air Duct Connection Improvement, dated October 21, 1947. (Accomplish portion covered by Service Change No. 354 and that portion of Service Change No. 358 which includes cable assemblies 1342327-502 and -504, hook No. 1342315, latch assembly 1342314, AN 960-10L, washers, AN 486-4 clevis, AN 393-11 and -13 pins, AN 380-2-2 cotters and AN 365-428 nuts.) In addition to the above, the following must also be accomplished on all aircraft: 1. Inspect the wing structure around the fuel tanks in accordance with Douglas Service Letter to all Operators dated December 29, 1947 (ref. A214TS-2521/SRD 529.37). Any damage found as a result of the inspection must be satisfactorily repaired. 2. The Airplane Flight Manual for each airplane must be revised to include FAA-approved procedures covering "Fuel Usage," "Fire Fighting" and "Smoke Evacuation from the Cockpit." This information, pages 1 and 2 of Section I, and pages 31 through 65 of Section III, as revised February 26, 1948, for aircraft incorporating Hamilton Standard Propellers, or pages 1 and 2 of Section I, and pages 31 through 71 of Section III, as revised February 26, 1948, for aircraft incorporating Curtiss Propellers, should be obtained from the Douglas Co. 3. Disconnect the cabin heater electrically and block off all fuel lines to this heater. Revised October 4, 1961. *Serial numbers of airplanes affected by this rework are listed on the pertinent Service Bulletin(s). Also, additional information may be obtained from the "Supplement" to "Cross Reference List-Service Changes and Modification Items" which has been prepared and revised by the Douglas Co. as of February 11 1948. FOOTER:
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