# Douglas DC-6

- Type: Aircraft model (FAA registry)
- Registry code: 3021702
- Manufacturer (registry): DOUGLAS
- Model: DC-6
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 4 · Reciprocating
- Seats: 96
- Weight class: 20,000 lb and over
- Cruise speed: 225 mph
- Certification: Type certificated
- Data sheet: [TCDS A-781](https://openairdocs.org/tcds/A-781) (OpenAirDocs)
- Holder: The Boeing Company
- Registered aircraft: 1
- Page: https://openairdocs.org/model/douglas-dc-6

Model codes come from the FAA registry's reference file. ADs are matched to them by model name and maker.

## ADs that may apply (OpenAirDocs)

Matched to this model by model name and maker. Each AD's applicability may narrow it by serial number, part number or equipment.

- [AD 2026-13-02](https://openairdocs.org/ad/2026-13-02): Navigation · Airbus Canada Limited Partnership 18, 49-46, 80-A and 555 more. Effective Jul 1, 2026
- [AD 2023-10-02](https://openairdocs.org/ad/2023-10-02): Indicating/Recording System, Navigation · Boeing 18, 23, 35 and 1,060 more. Effective May 26, 2023
- [AD 2017-06-05](https://openairdocs.org/ad/2017-06-05): Wings · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective May 1, 2017
- [AD 2011-12-01](https://openairdocs.org/ad/2011-12-01): Equipment/Furnishings · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 268 more. Effective Aug 1, 2011
- [AD 93-14-12](https://openairdocs.org/ad/93-14-12): Crewmember Protective Breathing Equipment Units · Airbus A300 B2-1A, A300 B2-1C, A300 B2-203 and 201 more. Effective Sep 2, 1993
- [AD 93-11-07](https://openairdocs.org/ad/93-11-07): Structural Integrity · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Jul 22, 1993
- [AD 89-11-07](https://openairdocs.org/ad/89-11-07): Main Landing Gear Fittings · Boeing DC-6, DC-6A, DC-6B and 6 more. Effective Jun 23, 1989
- [AD 88-04-01](https://openairdocs.org/ad/88-04-01): Vertical Stabilizer Spar Fittings · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Mar 21, 1988
- [AD 80-12-02 R1](https://openairdocs.org/ad/80-12-02-R1): Wing Fittings, Stringer, Skin Cracks · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Apr 21, 1987
- [AD 83-20-04](https://openairdocs.org/ad/83-20-04): Horizontal Stabilizer Rear Spar Caps · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Oct 19, 1983
- [AD 80-22-07](https://openairdocs.org/ad/80-22-07): Nose Gear Torque Link · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Nov 3, 1980
- [AD 67-13-02](https://openairdocs.org/ad/67-13-02): Operating Limitations · Boeing DC-6, DC-6A, DC-6B and 6 more. Effective Dec 1, 1978
- [AD 61-05-02](https://openairdocs.org/ad/61-05-02): Emergency Exit Door Hinges · Boeing DC-6, DC-6A and DC-6B. Effective Dec 1, 1978
- [AD 54-23-01](https://openairdocs.org/ad/54-23-01): Fuselage Skin · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective Dec 1, 1978
- [AD 74-17-01](https://openairdocs.org/ad/74-17-01): Regulator · Boeing 707-100 Long Body, 707-100B Long Body, 707-100B Short Body and 78 more. Effective Sep 16, 1974
- [AD 65-09-02](https://openairdocs.org/ad/65-09-02): Main Gear Torque Links · Boeing DC-6, DC-6A and DC-6B. Effective May 21, 1965
- [AD 64-03-03](https://openairdocs.org/ad/64-03-03): Blades · Boeing DC-6, DC-6A, DC-6B and 26 more. Effective Mar 1, 1964
- [AD 63-20-03](https://openairdocs.org/ad/63-20-03): Lower Center Spar Caps · Boeing DC-6, DC-6A and DC-6B
- [AD 62-25-02](https://openairdocs.org/ad/62-25-02): Main Landing Gear Shock Strut Cylinder · Boeing DC-6, DC-6A, DC-6B and 3 more
- [AD 61-23-04](https://openairdocs.org/ad/61-23-04): Spar Caps · Boeing DC-6, DC-6A and DC-6B. Effective Dec 7, 1961
- [AD 61-08-01](https://openairdocs.org/ad/61-08-01): Fuel Transfer · Boeing DC-6, DC-6A, DC-6B and 3 more. Effective May 9, 1961
- [AD 61-04-02](https://openairdocs.org/ad/61-04-02): Spar Caps · Boeing DC-6, DC-6A and DC-6B. Effective Mar 14, 1961
- [AD 60-02-05](https://openairdocs.org/ad/60-02-05): Spar Cap · Boeing DC-6, DC-6A and DC-6B
- [AD 53-05-01](https://openairdocs.org/ad/53-05-01): Propellers Slip Rings · Aero Spacelines 377, 377MG, 377SGT and 6 more
- [AD 60-03-04](https://openairdocs.org/ad/60-03-04): Propeller Blades · Boeing DC-6, DC-6A, DC-6B and 1 more
- [AD 58-23-02](https://openairdocs.org/ad/58-23-02): Stabilizer Spar Fittings · Boeing DC-6, DC-6A and DC-6B
- [AD 58-15-01](https://openairdocs.org/ad/58-15-01): Safety Belt Hook Assembly · Boeing DC-6, DC-6A, DC-6B and 3 more
- [AD 58-11-01](https://openairdocs.org/ad/58-11-01): Nose Wheel Retract Link · Boeing DC-6, DC-6A, DC-6B and 3 more
- [AD 56-13-01](https://openairdocs.org/ad/56-13-01): Wing Skin And Stringer Inspection · Boeing DC-6, DC-6A and DC-6B
- [AD 55-18-02](https://openairdocs.org/ad/55-18-02): Propeller Reverse Protective Device · Boeing DC-6, DC-6A and DC-6B
- [AD 55-15-04](https://openairdocs.org/ad/55-15-04): Propeller Feathering Lines · Boeing DC-6, DC-6A and DC-6B
- [AD 55-11-01](https://openairdocs.org/ad/55-11-01): Nose Gear Yoke End Fitting · Boeing DC-6, DC-6A, DC-6B and 3 more
- [AD 55-09-03](https://openairdocs.org/ad/55-09-03): Circuit Breaker · Boeing DC-6, DC-6A and DC-6B
- [AD 54-06-01](https://openairdocs.org/ad/54-06-01): Kiddie CO2 Discharge Valve · Boeing DC-6, DC-6A and DC-6B
- [AD 53-25-01](https://openairdocs.org/ad/53-25-01): Aileron Control System · Boeing DC-6, DC-6A and DC-6B
- [AD 53-08-02](https://openairdocs.org/ad/53-08-02): Center Wing Skin And Stringers · Boeing DC-6, DC-6A and DC-6B
- [AD 52-28-05](https://openairdocs.org/ad/52-28-05): Center Wing Lower Access Hole · Boeing DC-6, DC-6A and DC-6B
- [AD 52-27-02](https://openairdocs.org/ad/52-27-02): Outboard Front Spar Splice Plate · Boeing DC-6, DC-6A and DC-6B
- [AD 52-20-01](https://openairdocs.org/ad/52-20-01): Overvoltage Protection · Boeing DC-6, DC-6A and DC-6B
- [AD 52-18-02](https://openairdocs.org/ad/52-18-02): Spar Cap Rework · Boeing DC-6, DC-6A and DC-6B
- [AD 52-14-01](https://openairdocs.org/ad/52-14-01): Propeller Reversing Rework · Boeing DC-6, DC-6A and DC-6B
- [AD 51-10-01](https://openairdocs.org/ad/51-10-01): Wing Flap Operating Link · Boeing DC-6, DC-6A and DC-6B
- [AD 51-01-01](https://openairdocs.org/ad/51-01-01): Attachment Bolt Replacement · Boeing DC-6, DC-6A and DC-6B
- [AD 50-52-01](https://openairdocs.org/ad/50-52-01): Blades · Boeing DC-6, DC-6A, DC-6B and 4 more
- [AD 50-43-01](https://openairdocs.org/ad/50-43-01): Wheels · Boeing DC-6, DC-6A and DC-6B
- [AD 50-23-02](https://openairdocs.org/ad/50-23-02): Nose Gear Yoke End Fitting · Boeing DC-6, DC-6A and DC-6B
- [AD 50-18-02](https://openairdocs.org/ad/50-18-02): Engine Operation Placard · Boeing DC-6, DC-6A and DC-6B
- [AD 50-16-01](https://openairdocs.org/ad/50-16-01): Propeller Reverse Mechanism · Boeing DC-6, DC-6A and DC-6B
- [AD 49-46-01](https://openairdocs.org/ad/49-46-01): Vacuum System Fusible Plug · Boeing DC-4, DC-6, DC-6A and 1 more
- [AD 49-33-01](https://openairdocs.org/ad/49-33-01): Hamilton Standard Propeller Blades · Boeing DC-6, DC-6A and DC-6B

Historical (superseded or no longer in force):

- [AD 74-08-09 R2](https://openairdocs.org/ad/74-08-09-R2) (historical): Waste Receptacles · Aero Spacelines 377, 377MG, 377SGT and 268 more. Effective Jul 29, 1996

All 80: https://openairdocs.org/model/douglas-dc-6/ads.md

## Information bulletins (advisory) (1)

- [SAIB NM-15-03](https://openairdocs.org/saib/NM-15-03): Flight Controls. Issued Nov 24, 2014

## Registered aircraft (1)

- [N43872](https://openairdocs.org/aircraft/N43872): [Alaska Aviation Museum](https://openairdocs.org/faa-owner/ALASKA%20AVIATION%20MUSEUM), [Anchorage, AK](https://openairdocs.org/faa-place/AK/Anchorage), S/N 53-3294

## NTSB investigations (9)

From the NTSB's public API. Aircraft are matched to registry aircraft by N-number and event date, checked against the reported serial number, make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [NTSB MIA68A0067](https://openairdocs.org/ntsb/MIA68A0067), Feb 15, 1968: Douglas DC-6 (N1906M), Chattanooga, TN, substantial damage
- [NTSB CHI68A0026](https://openairdocs.org/ntsb/CHI68A0026), Sep 8, 1967: Douglas DC-6 (N37516), Vandalia, OH, no damage
- [NTSB OAK67A0058](https://openairdocs.org/ntsb/OAK67A0058), Jan 24, 1967: Douglas DC-6 (N74841), Oakland, CA, substantial damage
- [NTSB MIA66A0101](https://openairdocs.org/ntsb/MIA66A0101), Mar 3, 1966: Douglas DC-6 (N1904M), Birmingham, AL, substantial damage
- [NTSB NYC66I0049](https://openairdocs.org/ntsb/NYC66I0049), Oct 17, 1965: Douglas DC-6 (N90748), Boston, MA, incident, no damage
- [NTSB MIA66A0044](https://openairdocs.org/ntsb/MIA66A0044), Oct 17, 1965: Douglas DC-6 (N37519), Huntsville, AL, substantial damage
- [NTSB UNK64X4204](https://openairdocs.org/ntsb/UNK64X4204), Sep 29, 1964: Douglas DC-6 (N90885), New Orleans, LA, incident, no damage
- [NTSB CHI64A0027](https://openairdocs.org/ntsb/CHI64A0027), Aug 13, 1963: Douglas DC-6 (N1907M), Indianapolis, IN, substantial damage
- [NTSB LAX62A0127](https://openairdocs.org/ntsb/LAX62A0127), Dec 10, 1962: Douglas DC-6 (N37503), Los Angeles, CA, substantial damage

## FAA accident and incident reports (1)

From the FAA Accident/Incident Data System. Reports are matched to registry aircraft by N-number and event date, checked against the reported make and model; the registry's history has gaps, so older matches can be wrong. Compare the reported make and model.

- [Accident 19801128090569A](https://openairdocs.org/incident/19801128090569A), Nov 28, 1980: Doug DC6A (N844TA), Bimini, Bahamas, Destroyed. Aircraft leased by person using fake address. Found crashed in ocean. No bodies, no cargo. Clandestine operation.

## Service difficulty reports (153, newest 50)

As reported by operators and repair stations, by the model named in the report.

- [SDR FXGA20140422001](https://openairdocs.org/sdr/FXGA20140422001), Apr 22, 2014: SKIN. DAMAGED. PERFORM LE SKIN CUT OUT AT WS 83 FROM SPAR LOWER FLANGE TO SPAR UPPER FLANGE. REMOVE INBD SECTION OF SKIN FROM WS 60 TO 83. MANUFACTURE NEW SECTION OF SKIN & IN
- [SDR FXGA201402131417](https://openairdocs.org/sdr/FXGA201402131417), Feb 13, 2014: SKIN. CRACKED. REPLACEMENT OF ELEVATOR SKINS & TE CLOSE OUT PIECE. REPLACE UPPER SKINS BETWEEN STATION 218 & 279. REPLACE LOWER SKINS BETWEEN STATION 185 & 279. REPLACE TE FIB
- [SDR NACA20080008](https://openairdocs.org/sdr/NACA20080008), May 13, 2008: CYLINDER HEAD. DAMAGED. NR 1 ENGINE SHUT DOWN DUE TO BACKFIRING. REMOVED AND REPLACED NR 16 CYLINDER DUE TO BLOWN HEAD, REF: NAC DC-6MM SECT V PG 16 AND 16A. OP CHECKED GOOD.
- [SDR NACA20080007](https://openairdocs.org/sdr/NACA20080007), Apr 18, 2008: CYLINDER. FAILED. NR 4 ENGINE SHUTDOWN DUE TO NR 1 CYLINDER DOUBLE SHORTED SECONDARY. REMOVED AND REPLACED NR 1 CYLINDER DUE TO RING LAND FAILURE. REF: DC6MM SECT V PG 16, OP CHE
- [SDR NACA20080006](https://openairdocs.org/sdr/NACA20080006), Apr 2, 2008: CYLINDER. CRACKED. NR 3 ENGINE SHUT DOWN DUE TO BACKFIRING DURING CRUISE. REPLACED NR 2 CYLINDER DUE TO A CRACKED HEAD, REF: DC-6MM SECT V PG 16-17. OP CHECK GOOD.
- [SDR NACA20070022](https://openairdocs.org/sdr/NACA20070022), Dec 14, 2007: GEAR. STRIPPED. NR 2 ENGINE SHUT DOWN, QUIT ON TAKEOFF. BLOWER GEARS STRIPPED. REPLACED NR 2 ENGINE.
- [SDR NACA20070017](https://openairdocs.org/sdr/NACA20070017), Aug 22, 2007: SPARK PLUG. FAILED. NR 4 ENGINE SHUT DOWN DUE TO CONTINUOUS BACKFIRE IN CLIMB. INSPECTION REVEALED NO CRACKED CYLINDERS, FRONT CAM NO DEFECT. COMPRESSION TEST OF NR 12 CYLINDER CHE
- [SDR NACA20070016](https://openairdocs.org/sdr/NACA20070016), Aug 21, 2007: CYLINDER. FAILED. NR 4 ENGINE SHUT DOWN DUE TO RUNNING ROUGH AND DOUBLE SHORTED SECONDARY ON NR 1 CYLINDER. REMOVED AND REPLACED NR 1 CYLINDER DUE TO RING LAND FAILURE, REF: NAC 
- [SDR NACA20070015](https://openairdocs.org/sdr/NACA20070015), Aug 9, 2007: CYLINDER HEAD. CRACKED. NR 2 ENGINE SHUTDOWN DUE TO HIGH CHT, 150 DEGREES AT IDLE, 250+ DEGREES AT 30 INCHES WITH COWL FLAP AT 6 DEGREES. NR 2 ENGINE, NR 18 CYLINDER CRACKED HEAD. REPL
- [SDR NACA20070014](https://openairdocs.org/sdr/NACA20070014), Jun 2, 2007: CLUTCH. SLIPPED. NR 4 ENGINE SHUT DOWN DUE TO LOSS OF BMEP, (BMEP TO ZERO), LOSS OF ENGINE BLOWER. REPLACED ENGINE DUE TO CLUTCH FAILURE.
- [SDR NACA20070012](https://openairdocs.org/sdr/NACA20070012), Mar 28, 2007: CYLINDER. SEPARATED. NR 1 ENGINE BACKFIRING. ENGINE SHUT DOWN. REPLACED NR 1 ENGINE NR 8 CYLINDER DUE TO SEPERATED FINS FROM CYLINDER LINER. REF: DC-6MM SECT V PG 16 AND 16A. LEAK A
- [SDR NACA20070008](https://openairdocs.org/sdr/NACA20070008), Feb 28, 2007: HARNESS. CRACKED. NR 2 ENGINE SHUT DOWN, WOULD NOT TAKE A LEAN AND BACKFIRES IN RICH. FOUND CRACKED IGNITION HARNESS. REPLACED HARNESS REF: PURDUE MB 24-1-1. DISTRIBUTOR REPLACED
- [SDR NACA20070005](https://openairdocs.org/sdr/NACA20070005), Feb 10, 2007: CYLINDER. BURNED. NR 4 ENGINE SHUT DOWN DUE TO NR 18 CYLINDER FAILURE. REMOVED AND REPLACED NR 18 CYLINDER DUE TO BURN THROUGH ON SIDE OF CYLINDER, REF: DC-6MM SECT V PG 16 AND 1
- [SDR NACA20070006](https://openairdocs.org/sdr/NACA20070006), Feb 9, 2007: CLUTCH. FAILED. NR 2 ENGINE DROP IN BMEP, MAP DROPPED TO BAROMETRIC PSI, PRECAUTIONARY ENGINE SHUT DOWN. REPLACED NR 2 ENGINE DUE TO CLUTCH FAILURE REF: DC-6MM SECT V PG. 3-8.
- [SDR NACA20070004](https://openairdocs.org/sdr/NACA20070004), Feb 7, 2007: CYLINDER. CRACKED. NR 1 ENGINE WOULD NOT TAKE A LEAN IN CRUISE FLIGHT. PERFORMED PRECAUTIONARY SHUTDOWN. REMOVED AND REPLACED NR 16 CYLINDER DUE TO CRACKED HEAD, REF: NAC DC-6MM S
- [SDR NACA20070003](https://openairdocs.org/sdr/NACA20070003), Jan 31, 2007: VALVE. FAILED. NR 1 ENGINE BACKFIRED AND WOULD NOT HOLD A LEAN. ANALYZER PATTERN FOR NR 8 CYLINDER FRONT AND REAR ABNORMAL, SHOWS LOW COMPRESSION. ENGINE SHUT DOWN. NR 8 CYLIN
- [SDR NACA20070001](https://openairdocs.org/sdr/NACA20070001), Jan 5, 2007: DISTRIBUTOR. SHORTED. NR 2 ENGINE BACK FIRING, SUSPECT NR 11 CYLINDER REARS. ENGINE WAS UNABLE TO TAKE LEANING. FOUND PART OF A BROKEN BRUSH WEDGED BETWEEN INNER AND OUTER SEGMENT PL
- [SDR NACA20060052](https://openairdocs.org/sdr/NACA20060052), Nov 25, 2006: CYLINDER. FAILED. NR 1 ENGINE BACK FIRE ON DESCENT FLIGHT, SUSPECT NR 11 REAR. ENGINE SHUTDOWN. REPLACED NR 11 CYLINDER DUE TO RING LAND FAILURE.
- [SDR NACA20060050](https://openairdocs.org/sdr/NACA20060050), Nov 4, 2006: CARBURETOR. FAILED. NR 2 ENGINE SHUTDOWN DUE TO HIGH FUEL FLOW, BMEP FLUCTUATING AND OIL TEMP RISING. REPLACED CARBURETOR.
- [SDR NACA20060047](https://openairdocs.org/sdr/NACA20060047), Aug 23, 2006: ENGINE. FAILED. NR 3 ENGINE SHUTDOWN DUE TO RAPID OIL LOSS DURING CLIMB. REPLACED ENGINE DUE TO INTERNAL FAILURE, REF: NAC DC-6MM SEC. V. PG. 1-9.
- [SDR NACA20060046](https://openairdocs.org/sdr/NACA20060046), Aug 17, 2006: SUPERCHARGER. FAILED. ABORTED TAKEOFF DUE TO NR 3 ENGINE BACKFIRING DURING TAKEOFF ROLL. REPLACED NR 3 ENGINE DUE TO BLOWER FAILURE. REF NAC DC-6MM SEC V PG 1-9.
- [SDR NACA20060053](https://openairdocs.org/sdr/NACA20060053), Aug 10, 2006: SKIN. CRACKED. LEFT WING BOTTOM SKIN CRACKED 1.5" LONG AT WING STA 170, AND REAR SPAR. REMOVED DAMAGE, INSTALLED FILLER AND EXTERNAL DOUBLERS IAW BOEING ROD SKETCH JCT03928 AN
- [SDR UPS06847711](https://openairdocs.org/sdr/UPS06847711), Aug 3, 2006: FITTING. CRACKED. INSPECTION TYPE: C3 FLOORBEAM END FITTING CRACKED BETWEEN OB VERTICAL BOLTS ON FRONT OF PART, STA 1200 RT, IN C-PIT DOOR JAMB. REMOVED CRACKED END FITTING AT ST
- [SDR NACA20060043](https://openairdocs.org/sdr/NACA20060043), Jul 28, 2006: CYLINDER HEAD. CRACKED. NR 3 ENGINE SHUT DOWN DUE TO BACKFIRING. FOUND NR 2 CYLINDER WITH CRACKED HEAD. REPLACED CYLINDER ASSEMBLY IAW NAC DC-6MM SEC V PG 16-16A.
- [SDR NACA20060039](https://openairdocs.org/sdr/NACA20060039), Jun 3, 2006: CASE. SEPARATED. NR 1 ENGINE SHUT DOWN DUE TO OIL LOSS, QUANTITY AND PRESSURE. REPLACED NR 1 ENGINE DUE TO COLLECTOR CASE TO INTERMEDIATE REAR CASE SEPARATION PER NAC DC-6MM SEC
- [SDR NACA20060037](https://openairdocs.org/sdr/NACA20060037), Jun 1, 2006: CYLINDER. CRACKED. NR 2 ENGINE SHUT DOWN DUE TO LOW COMPRESSION INDICATION ON NR 2 CYLINDER. REPLACED NR 2 CYLINDER DUE TO CRACKED HEAD.
- [SDR NACA20060033](https://openairdocs.org/sdr/NACA20060033), Apr 12, 2006: CYLINDER. FAILED. NR 3 ENGINE FEATHERED DUE TO LOW COMPRESSION INDICATION ON NR 3 CYLINDER. REPLACED NR 3 CYLINDER ON NR 3 ENGINE DUE TO RING LAND FAILURE. REF: NAC DC-6MM SEC V 
- [SDR NACA20050029](https://openairdocs.org/sdr/NACA20050029), Nov 11, 2005: CYLINDER. CRACKED. NR 2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH AND WILL NOT TAKE A LEAN. FOUND NR 2 ENGINE NR 1 CYLINDER WITH CRACKED HEAD. REPLACED NR 1 CYLINDER IAW DC-6MM SECTIO
- [SDR NACA20050027](https://openairdocs.org/sdr/NACA20050027), Nov 7, 2005: CYLINDER. CRACKED. PRECAUTIONARY ENGINE FEATHER ON GROUND DUE TO OIL LOSS AND RUNNING ROUGH. FOUND NR 18 CYLINDER CRACKED. REPLACED NR 18 CYLINDER IAW MM SECT V PG. 16 AND 16A. OP
- [SDR NACA20050025](https://openairdocs.org/sdr/NACA20050025), Oct 21, 2005: SHAFT. SHEARED. NR 3 ENGINE SHUTDOWN ON GROUND UPON TAXI-IN DUE TO EXCESSIVE OIL LEAK. CAUSE OF EXCESSIVE OIL LEAKAGE WAS DUE TO A SHEARED LOWER SHAFT SECTION OF THE NOSE CASE 
- [SDR NACA20050021](https://openairdocs.org/sdr/NACA20050021), Sep 21, 2005: WARNING LIGHT. FALSE INDICATION. LOW OIL PRESSURE LIGHT ON DURING TAKEOFF ROLL. PERFORMED TAKEOFF POWER CHECK PER NAC DC-6 OP MANUAL SECTION 9.20 PT. 5 ON ENGINES 1, 2, 3, AND 4. NO DEFECTS NOT
- [SDR NACA20050019](https://openairdocs.org/sdr/NACA20050019), Aug 25, 2005: CYLINDER. GALLED. NR 4 ENGINE FEATHERED DUE TO NR 2 CYLINDER DOUBLE SHORTED SECONDARY. INSPECTED NR 2 CYLINDER SPARK PLUG AND FOUND TO BE PEENED. REPLACED NR 2 CYLINDER. OP CHECK
- [SDR NACA20050017](https://openairdocs.org/sdr/NACA20050017), Jul 12, 2005: LATCH. DAMAGED. LT MAIN GEAR WILL NOT STAY UP WITH GEAR SELECTOR IN NEUTRAL. REPLACED LATCH MECHANISM LINK ASSEMBLY. OPS CHECKED GOOD.
- [SDR NACA20050008](https://openairdocs.org/sdr/NACA20050008), Mar 8, 2005: CYLINDER. FAILED. NR 1 ENGINE SHUT DOWN AFTER BACKFIRING IN CRUISE AND COULD NOT RE-LEAN. REPLACED NR 10 CYLINDER DUE TO EXHAUST VALVE FAILURE. OP AND LEAK CHECK GOOD. COMPRESSIO
- [SDR NACA20050009](https://openairdocs.org/sdr/NACA20050009), Mar 6, 2005: SWITCH. BROKEN. NR 2 PROPELLER WOULD NOT UNFEATHER AFTER LANDING. REPLACED BROKEN BLADE SWITCH LEAD. CHECKED GOOD.
- [SDR NACA20050007](https://openairdocs.org/sdr/NACA20050007), Mar 3, 2005: ENGINE. MAKING METAL. NR 3 ENGINE SHUT DOWN DUE TO DOUBLE SHORTED SECONDARY ON NR 10 CYLINDER. PRELIMINARY INSPECTION FOUND INTERNAL FAILURE OF THE NR 3 ENGINE. NR 3 ENGINE REPLACED.
- [SDR NACA20050066](https://openairdocs.org/sdr/NACA20050066), Jan 12, 2005: DOWNLOCK SWITCH. FROZEN. RIGHT MAIN LANDING GEAR WARNING LIGHT SHOWING GEAR NOT DOWN AND LOCKED. REPLACED RIGHT MAIN LANDING GEAR DOWNLOCK SWITCH. CHECKED GOOD. FOUND WATER FROZEN IN RI
- [SDR NACA20040065](https://openairdocs.org/sdr/NACA20040065), Dec 24, 2004: BOLT. SHEARED. RIGHT FLAP OUTBOARD ACTUATOR BOLT SHEARED. REPLACED BOLT AND INSPECTED FLAP AND CARRIAGE SYSTEM, OK FOR SERVICE. INSTALLED NEW NUT AND WASHER. OP CHECKED GOOD.
- [SDR NACA20040064](https://openairdocs.org/sdr/NACA20040064), Dec 20, 2004: TRANSMITTER. INOPERATIVE. PRECAUTIONARY ENGINE SHUTDOWN, DUE TO LOSS OF OIL PRESSURE ON NR 4 ENGINE, OIL PRESSURE LIGHT STAYS OFF. REPAIRED ELECT CONNECTIONS IN OIL TRANSMITTER CANNON PL
- [SDR NACA20040063](https://openairdocs.org/sdr/NACA20040063), Dec 7, 2004: PROBE. DIRTY. NR 2 ENGINE SHUT DOWN DUE TO STEADY OIL LOSS INDICATION. CLEANED OIL QUANTITY CONNECTORS AT NR 2 OIL QUANTITY PROBE. OPS CHECKED GOOD.
- [SDR NACA20040054](https://openairdocs.org/sdr/NACA20040054), Nov 2, 2004: THERMOSTAT. SHORTED. NR 1 ENGINE OIL TEMPERATURE CIRCUIT BREAKER POPPED, COULD NOT BE RESET. REPLACED NR 1 ENGINE OIL THERMOSTAT. LEAK AND OP CHECKED GOOD.
- [SDR NACA20040053](https://openairdocs.org/sdr/NACA20040053), Oct 30, 2004: SPARK PLUG. CRACKED. NR 3 ENGINE SHUT DOWN DUE TO NR 10 CYLINDER DOUBLE SHORTED SECONDARY. REMOVED AND INSPECTED NR 10 CYLINDER SPARK PLUGS, FOUND NO DEFECTS. SHORTED NR 10 CYLINDER
- [SDR NACA20040048](https://openairdocs.org/sdr/NACA20040048), Oct 23, 2004: CYLINDER. FAILED. NR 4 ENGINE SHUT DOWN DUE TO BACK FIRING WHEN LEAN AND RUNNING ROUGH. NR 16 CYLINDER SHOWS LOW COMPRESSION. REPLACED NR 16 CYLINDER. OPS CHECKED GOOD.
- [SDR NACA20040046](https://openairdocs.org/sdr/NACA20040046), Oct 16, 2004: CYLINDER. DAMAGED. NR 2 ENGINE SHUT DOWN DUE TO BACK FIRING. REPLACED NR 5 CYLINDER DUE TO LOW COMPRESSION. OPS CHECKED GOOD.
- [SDR NACA20040045](https://openairdocs.org/sdr/NACA20040045), Oct 6, 2004: CYLINDER HEAD. CRACKED. DISCREPANCY: NR 4 ENGINE SHUT DOWN DUE TO LOW COMPRESSION INDICATION ON NR 2 CYLINDER. FOUND NR 2 CYLINDER WITH CRACKED HEAD. REPLACED NR 2 CYLINDER. CHECKED GO
- [SDR NACA20040043](https://openairdocs.org/sdr/NACA20040043), Oct 4, 2004: ENGINE. OVERSPEED. NR 3 ENGINE SHUT DOWN DUE TO OVERSPEED AND LOSS OF OIL. FOUND NR 3 ENGINE SEIZED AND OIL OVERBOARD. REPLACED NR 3 ENGINE. CHECKED GOOD.
- [SDR NACA20040049](https://openairdocs.org/sdr/NACA20040049), Oct 2, 2004: STRINGER. CORRODED. RIGHT FUSELAGE HAS SURFACE CORROSION AT STA 926 STRINGER 25. CUT OUT CORROSION. DAMAGE CUTOUT 3/4 INCH. FABRICATED AND INSTALLED DOUBLER. .040 7075-T6, DIMPLED 
- [SDR NACA20040044](https://openairdocs.org/sdr/NACA20040044), Sep 30, 2004: CYLINDER. CRACKED. NR 3 ENGINE, NR 18 CYLINDER RIGHT AND LEFT LOW COMPRESSION. CHECKED NR 18 CYLINDER AND SYNC GENERATOR, BOTH CHECKED GOOD. FOUND NR 11 CYLINDER WITH A CRACKED HE
- [SDR NACA20040061](https://openairdocs.org/sdr/NACA20040061), Sep 27, 2004: CARBURETOR. POWER LOSS. NR 2 ENGINE SHUT DOWN DUE TO RUNNING ROUGH, HIGH FUEL FLOW AND LOW BMEP CHT COLD. REMOVED AND REPLACED CARBURETOR. LEAK AND OP CHECK GOOD.
- [SDR NACA20040040](https://openairdocs.org/sdr/NACA20040040), Sep 27, 2004: CARBURETOR. POWER LOSS. NR 2 ENGINE SHUT DOWN DUE RUNNING ROUGH, HIGH FUEL FLOW, LOW BMEP AND COLD CHT. REMOVED AND REPLACED NR 2 ENGINE CARBURETOR. OP CHECKED GOOD.

All 153: https://openairdocs.org/model/douglas-dc-6/reports.md

## STCs that may be installed (OpenAirDocs) (59, first 50)

Approved for this model: the STC's model list names it on its data sheet, or a series that includes it. In force first, then newest. The registry doesn't record which STCs an aircraft has.

- [STC SA2622NM](https://openairdocs.org/stc/SA2622NM): Installation of Precise Flight Pulselite Control Unit in landing/taxi system. (767-200 B17) (DHC-8 101). Precise Flight Inc
- [STC SA863EA](https://openairdocs.org/stc/SA863EA): Incorporation of DME Corporation emergency evacuation slide lighting system. Astronics Luminescent Systems Inc
- [STC ST02580AT](https://openairdocs.org/stc/ST02580AT): Lithium cell battery pack to replace currently approved alkaline battery pack used in escape slide emergency light system. Astronics Luminescent Systems Inc
- [STC SA02268CH](https://openairdocs.org/stc/SA02268CH): Installation of Airwolf Filter Corp. Air Oil Separator. Airwolf Filter Corporation
- [STC SA01282NY](https://openairdocs.org/stc/SA01282NY): Installation of Airwolf remote mounted engine oil filter kit AFC-K015 on aircraft powered by Pratt & Whitney radial reciprocating engine Series R-985, R-1340 and R-1830. Airwolf Filter Corporation
- [STC ST334CH](https://openairdocs.org/stc/ST334CH): Installation of Superflite 102 fabric. Aviation Products Systems Inc
- [STC SA1045WE](https://openairdocs.org/stc/SA1045WE): Installation of door-mounted inflatable evacuation slides in accordance with United Air Lines Approved Drawing List COA 6-3072/COA 6-3087. United Air Lines Supplemental Revision No. 1 dated August 25, 1965, to Douglas Airplane Flight Manual SM-19501, or Supplemental Revision No. 1 dated June 10, 1966, to Douglas AFM SM-19544 is required. United Airlines Inc
- [STC SA1311WE](https://openairdocs.org/stc/SA1311WE): Installation of a United Data Control P/N V557 Voice Recorder in Boeing DC-6, DC-6A, DC-6B aircraft. United Airlines Inc
- [STC SA4-577](https://openairdocs.org/stc/SA4-577): Aileron trim control gearing modification. United Airlines Inc
- [STC SA363SO](https://openairdocs.org/stc/SA363SO): Cockpit voice recorder. Delta Airlines Inc
- [STC SA1366GL](https://openairdocs.org/stc/SA1366GL): Surrendered and incorporated into STC ST334CH. Cooper Aviation Supply Company, Inc
- [STC SA02168AK](https://openairdocs.org/stc/SA02168AK): Installation of hourmeter airspeed switch. For unpressurized aircraft only. Pressurized aircraft must have pressurization system deactivated. Avalaska Inc
- [STC SA1753WE](https://openairdocs.org/stc/SA1753WE): Installation of VIP core assembly P/N VIP-106-18. Vibration Isolation Products Corp
- [STC SA4-525](https://openairdocs.org/stc/SA4-525): Installation of VIP P/N 106-1J engine mount core. Vibration Isolation Products Corp
- [STC ST595SO](https://openairdocs.org/stc/ST595SO): Installation of exhaust system bracket. Atlas Aircraft Corporation
- [STC SA1083SO](https://openairdocs.org/stc/SA1083SO): Installation of four Pratt & Whitney R-2800-99W engines and Hamilton Standard propellers. Bellomy-Lawson Aviation Inc
- [STC SA1066SO](https://openairdocs.org/stc/SA1066SO): Alternate installation of hydraulic pump utilizing existing engine drive. Bellomy-Lawson Aviation Inc
- [STC ST484SO](https://openairdocs.org/stc/ST484SO): Installation of cargo restraining bulkhead. Aeronautical Engineers, Inc
- [STC SA3151WE](https://openairdocs.org/stc/SA3151WE): Installation of 3000 gallon external retardant tanks under the fuselage at the wing center section. Aero Union Corporation
- [STC ST536SO](https://openairdocs.org/stc/ST536SO): Installation of aft cargo door. Aeronautical Engineers, Inc
- [STC ST597SO](https://openairdocs.org/stc/ST597SO): Installation of aft cargo door. Aeronautique Engr Inc
- [STC ST535SO](https://openairdocs.org/stc/ST535SO): Installation of cargo floor. Aeronautical Engineers, Inc
- [STC ST843SO](https://openairdocs.org/stc/ST843SO): Installation of aft cargo door. Aeronautical Engineers, Inc
- [STC SA2994WE](https://openairdocs.org/stc/SA2994WE): Deactivation of high blower on CB-16 engines. Mercer Enterprises
- [STC ST807SO](https://openairdocs.org/stc/ST807SO): Installation of cargo interior and extension of lower aft cargo compartment. Bellomy-Lawson Aviation Inc
- [STC ST528SO](https://openairdocs.org/stc/ST528SO): Installation of cargo restraining bulkhead. Bellomy-Lawson Aviation Inc
- [STC ST555SO](https://openairdocs.org/stc/ST555SO): Installation of rear cargo door. Bellomy-Lawson Aviation Inc
- [STC SA2761WE](https://openairdocs.org/stc/SA2761WE): Interior arrangement. Mercer Enterprises
- [STC ST495SO](https://openairdocs.org/stc/ST495SO): Installation of aft cargo door. Aeronautical Engineers, Inc
- [STC ST470SO](https://openairdocs.org/stc/ST470SO): Installation of aft cargo door. Bellomy-Lawson Aviation Inc
- [STC ST463SO](https://openairdocs.org/stc/ST463SO): Installation of cargo door. Miami Aviation Corp
- [STC ST456SO](https://openairdocs.org/stc/ST456SO): Installation of cargo restraining bulkhead. A clean and unobstructed passageway between the crew compartment and cargo compartment on the side of the bulkhead is required. Aeronautical Engineers, Inc
- [STC SA1-580](https://openairdocs.org/stc/SA1-580): Television broadcasting equipment. Midwest Program on Airborne Television Instruction
- [STC SA7SO](https://openairdocs.org/stc/SA7SO): Radome and radar antennae mount provisions for up to 22-inch diameter antennae, RAC AVQ-10 or Bendix RDR-1 (X/C Band). Tempo Design Corp
- [STC SA1082WE](https://openairdocs.org/stc/SA1082WE): Interior arrangements. AiResearch Aivation Service Co
- [STC SA1148WE](https://openairdocs.org/stc/SA1148WE): Interior modifications. Jay- Dee Aircraft Supply Co
- [STC SA12SO](https://openairdocs.org/stc/SA12SO): Altimeter vibrators. Pan American World Airways Inc
- [STC SA1302WE](https://openairdocs.org/stc/SA1302WE): Fairchild A100 voice recorder. Western Airlines Inc
- [STC SA1517WE](https://openairdocs.org/stc/SA1517WE): Interior arrangement for 97 occupants, DME installation, interior emergency lighting installation. Mercer Enterprises
- [STC SA197SO](https://openairdocs.org/stc/SA197SO): Cockpit voice recorder. Pan American World Airways Inc
- [STC SA1PC](https://openairdocs.org/stc/SA1PC): DC-7 increased power cabin superchargers. Hawaiian Airlines Inc
- [STC SA21SO](https://openairdocs.org/stc/SA21SO): Modified zero reader system. Pan American World Airways Inc
- [STC SA229SO](https://openairdocs.org/stc/SA229SO): B-400 oil separator. Air Carrier Eng Service Inc
- [STC SA4-1169](https://openairdocs.org/stc/SA4-1169): Interior modifications. AiResearch Aivation Service Co
- [STC SA4-1311](https://openairdocs.org/stc/SA4-1311): Ceconite 101 covering of rudder. Cooper Engineering Corporation
- [STC SA4-202](https://openairdocs.org/stc/SA4-202): Oil filter 30816A with CP-1438-0 element. Winslow Aerofilter Corp
- [STC SA4-218](https://openairdocs.org/stc/SA4-218): Windows in fuselage. Pan American World Airways Inc
- [STC SA4-328](https://openairdocs.org/stc/SA4-328): Step kit added to fore and aft cargo door. National Aircraft Corp
- [STC SA4-41](https://openairdocs.org/stc/SA4-41): Structure, power plant, systems and equipment modification. Northwest Airlines Inc
- [STC SA4-502](https://openairdocs.org/stc/SA4-502): Engine mount core assemblies. Dow-Elco Inc

All 59: https://openairdocs.org/model/douglas-dc-6/stcs.md

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