# Douglas DC-6B

- Type: Aircraft model (FAA registry)
- Registry code: 3021712
- Manufacturer (registry): DOUGLAS
- Model: DC-6B
- Aircraft type: Fixed wing multi engine
- Category: Airplane
- Engines: 4 · Reciprocating
- Seats: 96
- Weight class: 20,000 lb and over
- Cruise speed: 216 mph
- Certification: Type certificated
- Data sheet: [TCDS 6A4](https://openairdocs.org/tcds/6A4) (OpenAirDocs)
- Holder: The Boeing Company
- Registered aircraft: 9
- Page: https://openairdocs.org/model/douglas-dc-6b

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 59-13-06](https://openairdocs.org/ad/59-13-06): Lower Front Spar Cap · Boeing DC-6A and DC-6B
- [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

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 81: https://openairdocs.org/model/douglas-dc-6b/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 (9)

- [N151](https://openairdocs.org/aircraft/N151): [Tatonduk Outfitters Ltd](https://openairdocs.org/faa-owner/TATONDUK%20OUTFITTERS%20LTD), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), S/N 45179
- [N434TA](https://openairdocs.org/aircraft/N434TA): [Bank Of Utah Trustee](https://openairdocs.org/faa-owner/BANK%20OF%20UTAH%20TRUSTEE), [Salt Lake City, UT](https://openairdocs.org/faa-place/UT/Salt%20Lake%20City), built 1954, S/N 44-434
- [N444CE](https://openairdocs.org/aircraft/N444CE): [Everts Air Fuel Inc](https://openairdocs.org/faa-owner/EVERTS%20AIR%20FUEL%20INC), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1958, S/N 45478
- [N555SQ](https://openairdocs.org/aircraft/N555SQ): [Tatonduk Outfitters Ltd](https://openairdocs.org/faa-owner/TATONDUK%20OUTFITTERS%20LTD), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1957, S/N 45137
- [N600UA](https://openairdocs.org/aircraft/N600UA): [Race Coast Aviation LLC](https://openairdocs.org/faa-owner/RACE%20COAST%20AVIATION%20LLC), [Port Orange, FL](https://openairdocs.org/faa-place/FL/Port%20Orange), built 1956, S/N 44894
- [N651CE](https://openairdocs.org/aircraft/N651CE): [Everts Air Fuel Inc](https://openairdocs.org/faa-owner/EVERTS%20AIR%20FUEL%20INC), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1958, S/N 45501
- [N6586C](https://openairdocs.org/aircraft/N6586C): [Everts Air Fuel Inc](https://openairdocs.org/faa-owner/EVERTS%20AIR%20FUEL%20INC), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1957, S/N 45222
- [N751CE](https://openairdocs.org/aircraft/N751CE): [Everts Air Cargo](https://openairdocs.org/faa-owner/EVERTS%20AIR%20CARGO), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), S/N 45177
- [N7919C](https://openairdocs.org/aircraft/N7919C): [Everts Air Fuel Inc](https://openairdocs.org/faa-owner/EVERTS%20AIR%20FUEL%20INC), [Fairbanks, AK](https://openairdocs.org/faa-place/AK/Fairbanks), built 1959, S/N 43554

## NTSB investigations (29)

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 ANC11CA044](https://openairdocs.org/ntsb/ANC11CA044), Jun 12, 2011: Douglas DC-6B (N600UA), Cold Bay, AK, substantial damage. Probable cause: The flight crew's failure to extend the landing gear, which resulted in an inadvertent wheels up landing. Contributing to the accident was the flight crew's diverted attention.
- [NTSB ANC01LA146](https://openairdocs.org/ntsb/ANC01LA146), Sep 26, 2001: Douglas DC-6B (N867TA), Nuiqsut, AK, substantial damage. Probable cause: The flightcrew's continued use of an unstabilized GPS approach. Factors associated with the accident were low ceilings, and the inadequate coordination between the crew.
- [NTSB ANC01LA034](https://openairdocs.org/ntsb/ANC01LA034), Jan 31, 2001: Douglas DC-6B (N4390F), Crooked Creek, AK, substantial damage. Probable cause: The flight crew's misjudged flare while landing. Factors associated with the accident were flat light conditions, snow-covered terrain, and an uphill runway grade.
- [NTSB ANC98LA014](https://openairdocs.org/ntsb/ANC98LA014), Jan 2, 1998: Douglas DC-6B (N861TA), Mcgrath, AK, destroyed. Probable cause: The ingestion of snow into the windshield anti-ice system, and the resulting obscured windshield which made runway alignment not possible. Factors associated with this accident were the cold…
- [NTSB ANC96LA042](https://openairdocs.org/ntsb/ANC96LA042), Apr 1, 1996: Douglas DC-6-B (N861TA), Beluga, AK, substantial damage. Probable cause: The Pilot-in-Command's selection of an unsuitable terrain area for taxi/parking and his misjudgment of the clearance required.
- [NTSB ANC92LA043](https://openairdocs.org/ntsb/ANC92LA043), Mar 3, 1992: Douglas DC-6B (N151), Selawik, AK, substantial damage. Probable cause: THE PILOT'S INADEQUATE PRE FLIGHT PLANNING AND DISREGARDING THE AIRCRAFT PERFORMANCE DATA. CONTRIBUTING FACTORS WERE THE EXTREME OUTSIDE AIR TEMPERATURES, THE ICY RUNWAY, AND THE TAILWIND.
- [NTSB DCA90RA025](https://openairdocs.org/ntsb/DCA90RA025), May 5, 1990: Douglas DC-6B (N84BL), Guatemala City, Guatemala, 27 fatal
- [NTSB MIA90RA034](https://openairdocs.org/ntsb/MIA90RA034), Dec 3, 1989: Douglas DC-6B (N371), George Town, Bahamas
- [NTSB MIA88FA132](https://openairdocs.org/ntsb/MIA88FA132), Mar 29, 1988: Douglas DC-6B (N92BL), Miami, FL, no damage
- [NTSB MIA85IA120](https://openairdocs.org/ntsb/MIA85IA120), Mar 15, 1985: Douglas DC-6B (N55CA), Miami, FL, incident, minor damage
- [NTSB MKC81IA041](https://openairdocs.org/ntsb/MKC81IA041), Jul 1, 1981: Douglas DC-6B (N8CA), St.Louis, MO, incident, minor damage
- [NTSB MIA80FA104](https://openairdocs.org/ntsb/MIA80FA104), Sep 15, 1980: Douglas DC-6B (N9018N), Haiti-In Ocean (Atlantic Ocean), destroyed, 3 fatal
- [NTSB CHI80FA046](https://openairdocs.org/ntsb/CHI80FA046), Jun 10, 1980: Douglas DC-6 (N111AS), Indianapolis, IN, substantial damage
- [NTSB UNK78X0133](https://openairdocs.org/ntsb/UNK78X0133), Aug 27, 1978: Douglas DC-6 (N122A), Muscat, Mauritius, destroyed, 4 fatal
- [NTSB MIA78FA047](https://openairdocs.org/ntsb/MIA78FA047), Feb 24, 1978: Douglas DC-6B (N6103C), San Juan, PR, destroyed
- [NTSB CHI77DEC45](https://openairdocs.org/ntsb/CHI77DEC45), Jul 16, 1977: Douglas DC-6A (N515TY), Ft.Wayne, IN, no damage
- [NTSB ANC75AA054](https://openairdocs.org/ntsb/ANC75AA054), Feb 16, 1975: Douglas DC-6B (N77DG), Fairbanks, AK, substantial damage, 2 fatal
- [NTSB DIA69I0015](https://openairdocs.org/ntsb/DIA69I0015), Sep 26, 1968: Douglas DC-6B (N37567), Norfolk, VA, incident, no damage
- [NTSB MKC68A0084](https://openairdocs.org/ntsb/MKC68A0084), Jun 20, 1967: Douglas DC-6B (N37567), 70e Hayes Cr., NE, no damage
- [NTSB NYC67A0120](https://openairdocs.org/ntsb/NYC67A0120), Feb 24, 1967: Douglas DC-6B (N8224H), Holmdel, NJ, substantial damage
- [NTSB NYC67A0119](https://openairdocs.org/ntsb/NYC67A0119), Feb 22, 1967: Douglas DC-6B (N6255C), Mar-Vineyard, MA, substantial damage
- [NTSB CHI67I0059](https://openairdocs.org/ntsb/CHI67I0059), Nov 2, 1966: Douglas DC-6B (N37575), Ft.Wayne, IN, incident, minor damage
- [NTSB UNK65X0760](https://openairdocs.org/ntsb/UNK65X0760), Nov 20, 1964: Douglas DC-6 (N93128), San Francisco, CA, incident, minor damage
- [NTSB UNK65X0314](https://openairdocs.org/ntsb/UNK65X0314), Oct 18, 1964: Douglas DC-6B (N93130), Hector, CA, incident, no damage, 1 fatal
- [NTSB UNK64X1622](https://openairdocs.org/ntsb/UNK64X1622), May 4, 1964: Douglas DC-6B (N37558), Rochester, NY, substantial damage
- [NTSB LAX64A0036](https://openairdocs.org/ntsb/LAX64A0036), Dec 17, 1963: Douglas DC-6B (N93131), Los Angeles, CA, substantial damage
- [NTSB DCA63A0007](https://openairdocs.org/ntsb/DCA63A0007), May 31, 1963: Douglas DC-6B (N7919C), Wildwood, NJ, substantial damage
- [NTSB OAK63A0064](https://openairdocs.org/ntsb/OAK63A0064), Feb 7, 1963: Douglas DC-6B (N93123), Mt.Hamilton, CA, no damage
- [NTSB NYC62A0023](https://openairdocs.org/ntsb/NYC62A0023), Mar 7, 1962: Douglas DC-6B (N90765), Buffalo, NY, substantial damage

## FAA accident and incident reports (25)

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.

- [Incident 20121108025969I](https://openairdocs.org/incident/20121108025969I), Nov 8, 2012: Douglas DC-6B (N151), Deadhorse, AK, No damage. A totonduk outfitters' ltd (dba everts air cargo) DC-6-B, N151, landed several feet short of runway (rwy) 23 at the Deadhorse Airport (scc). The short landing…
- [Accident 20110612012009A](https://openairdocs.org/incident/20110612012009A), Jun 12, 2011: Douglas DC-6B (N600UA), Cold Bay, AK, Substantial damage. While approaching the pattern for runway 26 at cdb, pilot distracted the crew by pointing out the boat dock where their cargo was being prepared. Flaps were…
- [Incident 20030404005099I](https://openairdocs.org/incident/20030404005099I), Apr 4, 2003: Doug DC6B (N151), Fairbanks, AK, Minor damage. (-23) [privacy data omitted] on take off from Fairbanks, N151 lost the #3 engine cowl. The aircraft returned to base.
- [Accident 20010925024809A](https://openairdocs.org/incident/20010925024809A), Sep 25, 2001: Doug DC6B (N867TA), Nuiqsut, AK, No damage. (.19) On September 25, 2001, about 1609 Alaska daylight time, a Douglas DC-6B airplane, N867TA, sustained substantial damage during landing at the alpine…
- [Accident 20010131000769A](https://openairdocs.org/incident/20010131000769A), Jan 31, 2001: Doug DC6B (N4390F), Donlin Creek, AK, No damage. (-23)[privacy data omitted] pilot had no visual queues.f lat light conditions (white-out) existed with 2 miles visibility and light snow. Hard landing on…
- [Accident 19980102000029A](https://openairdocs.org/incident/19980102000029A), Jan 2, 1998: Doug STCDC6 (N861TA), Mcgrath, AK, Destroyed. Windshield fogged on takeoff roll. Aborted. Veered into snow bank edge of runway. Caught fire. Evacuated safely. (From .4) during the takeoff roll, while…
- [Accident 19960401007519A](https://openairdocs.org/incident/19960401007519A), Apr 1, 1996: Doug DC6B (N861TA), Beluga, AK, Substantial damage. Collided with steel support pole turning to off load fuel. Backed up. Tail hit above ground fuel tank. Light nose.
- [Accident 19950620049139A](https://openairdocs.org/incident/19950620049139A), Jun 20, 1995: N600UA, Champaign, IL, No damage. (-16) United airlines flt. #19 enroute from jfk airport, new york, to san francisco, CA. Flight was deviating north off course around thunderstorms. Flight…
- [Incident 19950412011379I](https://openairdocs.org/incident/19950412011379I), Apr 12, 1995: Doug DC6B (N4390F), Fairbanks, AK, Minor damage. Narrative: on 04/12/95 a DC-6-B, N4390F operated by everts air fuel inc., departed the ramp at Fairbanks int'l after fueling the international bulk fuel tanks…
- [Accident 19920303005009A](https://openairdocs.org/incident/19920303005009A), Mar 3, 1992: Doug DC6B (N151), Selawik, AK, Substantial damage. Overran ice and snow covered runway. Factors light downwind. Short runway for type. Props slow to reverse at minus 32
- [Accident 19900505013949A](https://openairdocs.org/incident/19900505013949A), May 5, 1990: Doug DC6 (N84BL), Guatemala City, GT, Destroyed, 25 fatal. Aircraft crashed into urban residential area shortly after departure.
- [Incident 19900113010069I](https://openairdocs.org/incident/19900113010069I), Jan 13, 1990: Doug DC6B (N7919C), Anchorage, AK, Minor damage. Hit a tug and ground power unit that was parked in front of aircraft when it started to taxi for takeoff.
- [Incident 19881222067399I](https://openairdocs.org/incident/19881222067399I), Dec 22, 1988: Doug DC6B (N151), Fairbanks, AK. NR4 engine overspeed on climbout. Declared emergency and returned. Prop governor assembly and malfunctioned.
- [Incident 19881119063839I](https://openairdocs.org/incident/19881119063839I), Nov 19, 1988: Doug DC6B (N867TA), Anchorage, AK. Lost directional control on takeoff roll. Veered off runway. Aborted. Hit runway light. Changed nose tire.
- [Accident 19880329008701A](https://openairdocs.org/incident/19880329008701A), Mar 29, 1988: Doug DC6B (N92BL), Miami, FL, Minor damage. Pilot taxiing around N30042. Misjudged distance and hit its rudder with his left wingtip. Able to continue flight.
- [Incident 19850315069759I](https://openairdocs.org/incident/19850315069759I), Mar 15, 1985: Doug DC6B (N55CA), Miami, FL, Minor damage. Aborted takeoff after engine power drop. During deceleration phase engine seized and propeller separated.
- [Incident 19850207006559I](https://openairdocs.org/incident/19850207006559I), Feb 7, 1985: Doug DC6B (N111AP), Ypsilanti, MI, Minor damage. On rollout started skid. Left wing lifted when aileron and rudder were applied. Nr 4 propeller struck runway.
- [Incident 19840905052989I](https://openairdocs.org/incident/19840905052989I), Sep 5, 1984: Doug DC6B (N515TY), Detroit, MI, Minor damage. Aircraft wing tip hit tail cone of parked aircraft during taxi and being guided by ground agent.
- [Incident 19811015081309I](https://openairdocs.org/incident/19811015081309I), Oct 15, 1981: Doug DC6B (N8CA), St Louis, MO, Minor damage. Lost hydraulic pressure due to low fluid level on landing roll, ran off runway. Nose gear hyd accumulator refilled.
- [Incident 19810701062039I](https://openairdocs.org/incident/19810701062039I), Jul 1, 1981: Doug DC6B (N8CA), St Louis, MO, Minor damage. Lost hydraulic pressure on approach. Landed and ran off runway. Hit arresting cable anchor. Pressure line broken.
- [Incident 19801216085509I](https://openairdocs.org/incident/19801216085509I), Dec 16, 1980: Doug DC6 (N4061K), Nashville, TN, Substantial damage. Aircraft departing freight ramp made 180 degree turn and struck a parked plane.
- [Incident 19801126080379I](https://openairdocs.org/incident/19801126080379I), Nov 26, 1980: Doug DC6B (N8CA), Minneapolis, MN. Left outboard main wheel came off during landing rollout. Axle nut to axle lock bolts failed.
- [Accident 19800915082179A](https://openairdocs.org/incident/19800915082179A), Sep 15, 1980: Doug DC6B (N9018N), Great Inagua, Bahamas, Destroyed, 2 fatal. Aircraft was ditched in ocean after three engines had to be shut down.
- [Incident 19800628056489I](https://openairdocs.org/incident/19800628056489I), Jun 28, 1980: Doug DC6B (N72522), St Louis, MO. Engine shutdown due to high oil temp. Metal found in the oil screen.
- [Accident 19780827041499A](https://openairdocs.org/incident/19780827041499A), Aug 27, 1978: Doug C118A (N122A), Destroyed, 1 fatal

## Service difficulty reports (127, newest 50)

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

- [SDR FXGA20190408001](https://openairdocs.org/sdr/FXGA20190408001), Apr 5, 2019: PROPELLER. MALFUNCTIONED. #4 PROPELLER RUNAWAY DURING CLIMB. #4 TACH NEVER EXCEEDED 2800 RPM PRIOR TO FEATHER. PRIOR TO RUNAWAY #4 BMEP AND #4 OIL QUANTITY WAS DROPPING SLOW. BMEP WAS @ 
- [SDR FXGA201802221804](https://openairdocs.org/sdr/FXGA201802221804), Feb 22, 2018: SHIELD. CORRODED. REPLACEMENT OF SHIELDS IN FWD AILERON CROSS. TO REPLACE CORRODED AND CRACKED SHIELDS IN THE FORWARD AILERON CROSS COMPARTMENT. SIX STRINGER TO FUSELAGE SHIELDS 
- [SDR FXGA201802141803](https://openairdocs.org/sdr/FXGA201802141803), Feb 14, 2018: SKIN. DENTED. DENT ON VERTICAL STABILIZER LEADING EDGE AT VSS 90.
- [SDR FXGA201802121802](https://openairdocs.org/sdr/FXGA201802121802), Feb 12, 2018: FRAME. CRACKED. FUSELAGE FRAME FOUND CRACKED. REMOVED AND REPLACED THE FRAME.
- [SDR FXGA201706271714](https://openairdocs.org/sdr/FXGA201706271714), Jun 27, 2017: STRINGER. CRACKED. STRINGER 21 CAP CRACKED AT RT WING STATION 195. REPAIRED IAW EO 9915.
- [SDR FXGA201706071712](https://openairdocs.org/sdr/FXGA201706071712), Jun 7, 2017: SKIN. CRACKED. LOWER WING SKIN CRACK W/STA 335L. TO REPAIR A CRACK ON THE LOWER WING SKIN AT W/STA 335L. AN APPROXIMATELY 2.25" CRACK WAS FOUND ON THE LOWER WING SKIN AT THE A
- [SDR FXGA20170411001](https://openairdocs.org/sdr/FXGA20170411001), Apr 10, 2017: TEST SWITCH. MALFUNCTIONED. AFT BAG FIRE HANDLE INTERMITTENT ILLUMINATION. (LT/RT CYL ALSO)
- [SDR FXGA201609151626](https://openairdocs.org/sdr/FXGA201609151626), Sep 7, 2016: BRACKET. CRACKED. CRACKED FLAP BRACKET AT LT WING STA 281. THE FLAP BRACKET ON THE LT WING IS CRACKED AT WING STA 281. THE OTBD SIDE OF THE FLAP HINGE BRACKET IS CRACKED AT WING 
- [SDR FXGA201609121625](https://openairdocs.org/sdr/FXGA201609121625), Aug 31, 2016: SKIN. CRACKED. CRACKED WING SKIN AND FILLER WITH STA 235.5 AND WING STR 20 TO REPAIR A CRACK IN THE WING SKIN AND FILLER BETWEEN WING SKIN AND LANDING DOUBLER. PERFORM CUTOUT 
- [SDR FXGA201608311624](https://openairdocs.org/sdr/FXGA201608311624), Aug 30, 2016: FRAME. CRACKED. CRACK ON LEFT FUSELAGE FRAME AT BS 661. SEVEN INCHES ABOVE FUSELAGE FLOOR.
- [SDR FXGA201608291623](https://openairdocs.org/sdr/FXGA201608291623), Aug 29, 2016: ACCESS PANEL. CRACKED. CRACKED ACCESS PANEL ATTACH FLANGES AT WING STA 49 AT PANEL 136 LT AND RT, AND 133 RT. TO REPAIR 5 CRACKS IN THE ATTACH FLANGES OF ACCESS PANELS. THE CRACKS IN 
- [SDR FXGA201603141604](https://openairdocs.org/sdr/FXGA201603141604), Mar 14, 2016: LAP JOINT. CORRODED. CORRODED SKIN LAP JOINT AT FS 906, BETWEEN STRINGER 33L & 33R. TO REPAIR A CORRODED SKIN LAP JOINT, CUT OUT DAMAGED SKINS & PERFORM REPAIR IAW THE INSTRUCTION O
- [SDR FXGA201601151553](https://openairdocs.org/sdr/FXGA201601151553), Dec 15, 2015: SKIN. CRACKED. LOWER WING SKIN CRACK AT WS 170L, BETWEEN STRINGER 18 & 19. TO REPAIR A CRACK IN THE LOWER WING SKIN JUST OTBD OF THE NR 2 NACELLE ATTACH ANGLE. A CRACK IN THE 
- [SDR FXGA201512151552](https://openairdocs.org/sdr/FXGA201512151552), Dec 15, 2015: STRUCTURE. CORRODED. REPLACEMENT OF MAIN CABIN FLOOR & FLOOR STRINGERS, BETWEEN FS 300 & 317. TO REPLACE A SECTION OF CORRODED FLOOR SKIN & STRINGER, BETWEEN FS 300 & 317. REMOVE FL
- [SDR FXGA201512111549](https://openairdocs.org/sdr/FXGA201512111549), Dec 11, 2015: SKIN. CRACKED. CRACKED & CORRODED SKIN AROUND ANTENNA BASE AT FS 79, BETWEEN STRINGER 5R & 6R TO REPAIR A CRACKED FUSELAGE SKIN, DUE TO CORROSION. REMOVE ANTENNA. CUT OUT DAMA
- [SDR FXGA201512071547](https://openairdocs.org/sdr/FXGA201512071547), Dec 11, 2015: SKIN. CRACKED. UPPER WING SKIN CRACKED AT NR 2 AT FUEL TANK ACCESS DOOR NR 90. TO REPAIR A CRACK IN THE UPPER WING SKIN AT THE AFT OTBD CORNER OF NR 2 ALT FUEL TANK ACCESS DOO
- [SDR FXGA201512111546](https://openairdocs.org/sdr/FXGA201512111546), Dec 11, 2015: FLOORBEAM. CRACKED. CRACKED FLOORBEAM AT FS 302, RBL 32. TO REPAIR CRACK IN THE UPPER FLANGE OF THE RBL 32 FLOORBEAM. INSTALL WEB DOUBLER & UPPER REINFORCING DOUBLER IAW DWG 1546-0
- [SDR FXGA201512091545](https://openairdocs.org/sdr/FXGA201512091545), Dec 3, 2015: FLOOR PANEL. CORRODED. FLOOR PANEL CORRODED THROUGH AT FS 560, CTR LINE. REPAIR CORRODED SKIN IAW DC 6 A & B OVERHAUL MANUAL FIGURE 12-5.
- [SDR FXGA20150702001](https://openairdocs.org/sdr/FXGA20150702001), Jul 2, 2015: SMOKE DETECTOR. MALFUNCTIONED. SMOKE ALARM WENT OFF AFTER TAKEOFF. CREW DECLARED EMER & RETURNED, LANDED DUE TO SMOKE ALARM SOUNDING. FOUND NR 2 SMOKE DETECTOR IN MAIN CABIN TO HAVE HAD THE B
- [SDR FXGA201506171525](https://openairdocs.org/sdr/FXGA201506171525), Jun 25, 2015: STRINGER. CRACKED. CRACKED WING STRINGER 21 AT WS 179R. TO REPAIR WING STRINGER, REMOVE EXISTING REPAIR MADE IAW SRM IO 1C-118A-3-1 AROUND FUEL TANK ACCESS PANEL CUT, STRINGER 21 
- [SDR FXGA201506241526](https://openairdocs.org/sdr/FXGA201506241526), Jun 24, 2015: DOUBLER. CORRODED. REPLACEMENT OF CORRODED DOUBLER OTBD OF NR 2 NACELLE BETWEEN CTR & AFT SPARS. REPLACE AN EXISTING CORRODED DOUBLER WITH A NEW ONE IAW SRM TO 1C-188A-3-1. MANUFA
- [SDR FXGA201505071520](https://openairdocs.org/sdr/FXGA201505071520), May 7, 2015: SKIN. WORN. LOWER FLAP SKIN WORN AT WS 250R. TO REPAIR WORN SKIN AT 250R AT CTR SPAR ATTACH FASTENERS. REMOVE DAMAGE & REPAIR IAW OVERHAUL MANUAL FIG 1347.
- [SDR FXGA201410281442](https://openairdocs.org/sdr/FXGA201410281442), Oct 28, 2014: BULKHEAD WEB. PUNCTURED. BULKHEAD PUNCTURED BS 341, RBL 8. REPAIRED THE BULKHEAD IAW A & B O/H MANUAL FIG 12-6.
- [SDR FXGA201410281443](https://openairdocs.org/sdr/FXGA201410281443), Oct 28, 2014: BULKHEAD WEB. CRACKED. BULKHEAD WEB CRACKEDAT BS 600, RBL 12. REPAIRED IAW A & B O/H MANUAL FIG 11-52 AND DWG 1443-01.
- [SDR FXGA201405211424](https://openairdocs.org/sdr/FXGA201405211424), May 21, 2014: SKIN. CORRODED. REPAIR AROUND WINDOW AT STATION 157 BETWEEN STRINGER 14R & 16R. THE CORROSION IS LOCATED BETWEEN THE OUTER SKIN & WINDOW CUT OUT DOUBLER. THE OUTER SKIN WILL BE
- [SDR FXGA201304181318](https://openairdocs.org/sdr/FXGA201304181318), Apr 18, 2013: STRINGER. CORRODED. STRINGER 13 CORRODED AT FS 80. REPAIRED IAW EO 1318.
- [SDR FXGA201303281316](https://openairdocs.org/sdr/FXGA201303281316), Mar 28, 2013: SKIN. DAMAGED. LOWER FLAP SKIN DAMAGED. SKIN REPAIRED IAW EO 1316.
- [SDR FXGA20121001001](https://openairdocs.org/sdr/FXGA20121001001), Oct 1, 2012: FIRE WARNING. ILLUMINATED. ABORTED TAKEOFF DUE TO FIRE WARNING LIGHT CAME ON FOR EITHER NR 1 OR NR 2 ENGINE ZONE 2 & 3.
- [SDR FXGA201208071252](https://openairdocs.org/sdr/FXGA201208071252), Aug 7, 2012: FLOOR PANEL. DAMAGED. FLOOR PANEL DAMAGED, REPAIRED IAW EO 1252.
- [SDR FXGA201208071253](https://openairdocs.org/sdr/FXGA201208071253), Aug 7, 2012: STRUCTURE. CRACKED. REINFORCING RING CRACKED AT CENTER WING SECTION REPAIRED PER EO INSTRUCTIONS.
- [SDR FXGA201203091220](https://openairdocs.org/sdr/FXGA201203091220), Mar 9, 2012: DOUBLER. CRACKED. CABIN HEATER EXHAUST DOUBLER BS 572 HAS TWO CRACKS. FABRICATE TWO INSERTS & AN EXTERNAL DOUBLER.
- [SDR FXGA201203081217](https://openairdocs.org/sdr/FXGA201203081217), Mar 8, 2012: FABRIC. TORN. LOWER RUDDER END RIB FABRIC TORN. R & R OF TORN & DAMAGED FABRIC.
- [SDR FXGA201203021216](https://openairdocs.org/sdr/FXGA201203021216), Mar 2, 2012: SKIN. DAMAGED. FUSELAGE SKIN & DOOR FRAME CLOSE OUT ANGLES AT AFT EDGE OF MAIN CARGO DOOR BS 794. REPAIRED.
- [SDR FXGA201202251213](https://openairdocs.org/sdr/FXGA201202251213), Feb 25, 2012: ATTACH ANGLE. CRACKED. NR 4 NACELLE INBD ATTACH ANGLE CRACKED. R & R CRACKED ANGLE.
- [SDR FXGA201202251214](https://openairdocs.org/sdr/FXGA201202251214), Feb 25, 2012: ATTACH ANGLE. CORRODED. REPLACEMENT OF A CORRODED LE RIB ATTACH ANGLE BETWEEN WS 184L & NR 2 NACELLE & REPAIR OF THE WEB & ATTACHING SKIN EO 1214.
- [SDR CA110601010](https://openairdocs.org/sdr/CA110601010), May 31, 2011: CYLINDER HEAD. CRACKED. NR1 ENGINE RUNNING ROUGH WHEN LEANED OUT NR3 CYL EXHAUST EAR CRACKED. CYLINDER REPLACED.
- [SDR FXGA20110517001](https://openairdocs.org/sdr/FXGA20110517001), May 17, 2011: BRAKE ASSY. WEAK. BRAKES REQUIRED LARGE AMOUNT OF PRESSURE AND GAVE VERY POOR BRAKING. BLED AND INSP BRAKES IAW DC6LMM 26-23 GROUND AND OPS CHECK GOOD.
- [SDR FXGAN20110405002](https://openairdocs.org/sdr/FXGAN20110405002), Apr 5, 2011: SKIN. CORRODED. CORROSION DISCOVERED ON LOWER WING SKIN NEAR PANEL 182C-R. INSTALLED REPAIR DOUBLER IAW EAC EO 1113 AND 8110-3 DATED 4/05/2011
- [SDR FXGAN20110405001](https://openairdocs.org/sdr/FXGAN20110405001), Apr 5, 2011: DOOR. CRACKED. CRACK DISCOVERED IN MAIN CARGO DOOR REPAIRED PER EAC EO 1109 AND 8110-3 DATED 3/29/2011
- [SDR FXGA20101210001](https://openairdocs.org/sdr/FXGA20101210001), Dec 10, 2010: PIPE. DISCONNECTED. SHUTDOWN NR4 ENGINE DUE TO LOSS OF BMEP AND FUEL FLOW, RECONNECTED INTAKE PIPE AND SAFTIED AT CYL NR9.
- [SDR FXGAN151EO1058](https://openairdocs.org/sdr/FXGAN151EO1058), Nov 18, 2010: BULKHEAD. DAMAGED. FOUND 6 DAMAGED AREAS ON AFT CARGO COMPARTMENT BULKHEAD STA X -18/Y 29.5, STA X -9/Y 22.5. REPAIRED MINOR DAMAGE TO THE REAR CARGO COMPARTMENT BULKHEAD IAW EAC 
- [SDR FXGAN151EO1057](https://openairdocs.org/sdr/FXGAN151EO1057), Nov 18, 2010: SKIN. CRACKED. FOUND 3 SMALL CRACKS IN CARGO FLOOR SKIN FUS, STA 919 TO 930, 2 SMALL CRACKS IN CARGO FLOOR SKIN AT FUS, STA 869.5 TO 859.5, FOUND 5 SMALL CRACKS IN CARGO FLOOR
- [SDR FXGAN151EO1056](https://openairdocs.org/sdr/FXGAN151EO1056), Nov 18, 2010: SKIN. CORRODED. FOUND CORROSION ON BOTTOM WING SKIN STA 347R IN EXHAUST PATH AREA. REPAIRED IAW EAC EO 1056.
- [SDR FXGAN151](https://openairdocs.org/sdr/FXGAN151), Sep 14, 2010: STRUCTURE. CORRODED. FOUND CORROSION BETWEEN FUSELAGE STA 964.75 AND 1010.25 NEAR TAIL HEATER EXHAUST DOUBLER. REPAIRED IAW 8110-3 DATED 9/13/10, 1026.
- [SDR CA100709004](https://openairdocs.org/sdr/CA100709004), Jul 5, 2010: VALVE SEAT. DISLODGED. EXHAUST VALVE SEAT DROPPED OUT JAMMING VALVE IN OPEN POSITION.
- [SDR CA100608010](https://openairdocs.org/sdr/CA100608010), Jun 3, 2010: COWL FLAP. FAILED. (CAN) NR 4 COWL GILL FAILS TO ACTUATE.
- [SDR FXGA151](https://openairdocs.org/sdr/FXGA151), May 20, 2010: AMPLIFIER. OVERHEATED. AUDIBLE POP SOUND FOLLOWED BY A BURNING/SMOLDERING SMELL IN COCKPIT. NO VISUAL SMOKE REPORTED BY THE FLIGHT CREW. FOUND THAT THE NR 2 COMPASS AMPLIFIER HAD BLOW
- [SDR CA090616003](https://openairdocs.org/sdr/CA090616003), Jun 10, 2009: CYLINDER. CRACKED. (CAN) CYLINDER HEAD CRACKED AROUND EXHAUST EAR.
- [SDR CA080724007](https://openairdocs.org/sdr/CA080724007), Jul 22, 2008: PITOT SYSTEM. CLOGGED. (CAN) BOTH NR 1 AND NR 2 PITOT SYS INDICATED NO AIRSPEED ON TAKEOFF RUN. TAKEOFF WAS ABORTED. BUGS AND SIMILAR DEBRIS FOUND IN BOTH PITOT SYS. APAR LINES BLOWN 
- [SDR CA080709010](https://openairdocs.org/sdr/CA080709010), Jul 6, 2008: SCAVENGE PUMP. FAILED. (CAN) NR4 BMEP WENT TO 0. OIL TANK QUANTITY DROPPED FROM 25GALS TO 12 GALS IN A FEW MINUTES. ENGINE WAS FEATHERED AND LANDING CARRIED OUT WITHOUT FURTHER INCIDE

All 127: https://openairdocs.org/model/douglas-dc-6b/reports.md

## STCs that may be installed (OpenAirDocs) (93, 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 ST02962AT](https://openairdocs.org/stc/ST02962AT): Installation of L3 Communications Traffic Alert and Collision Avoidance System Model 791A (TCAS791A). Woven Electronics, LLC
- [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 SA1170NW](https://openairdocs.org/stc/SA1170NW): Modify type design by installing bulk liquid cargo tank assembly. Everts Air Cargo
- [STC ST02965AT](https://openairdocs.org/stc/ST02965AT): Installation of Collins PN101 Compass System. B/E Aerospace Inc
- [STC ST02963AT](https://openairdocs.org/stc/ST02963AT): Installation of Collins ALT-55B Radio Altimeter System. B/E Aerospace Inc
- [STC SA2721WE](https://openairdocs.org/stc/SA2721WE): Install external retardant tank. United Aeronautical Corporation
- [STC ST334CH](https://openairdocs.org/stc/ST334CH): Installation of Superflite 102 fabric. Aviation Products Systems 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 SA4-1466](https://openairdocs.org/stc/SA4-1466): Conversion of DC-6B interior from coach to first class arrangement per United Air Lines Drawing 15F-1800 change "C". United Airlines Inc
- [STC SA528WE](https://openairdocs.org/stc/SA528WE): Interior modifications for two 85 occupant configurations and rework of seats to provide removable arm rests as described on United Air Lines Approved Drawing List Nos. COA 6-3023 dated October 14, 1963, COA 6-3036 dated October 28, 1963, and COA 6-3053, Revision B, dated August 21, 1964. United Airlines Inc
- [STC ST02275AK](https://openairdocs.org/stc/ST02275AK): Approval for Douglas DC-6A and DC-6B aircraft operations on runways with slopes in excess of 2% gradient up to 6% gradient. Everts Air Cargo
- [STC ST981SO](https://openairdocs.org/stc/ST981SO): Deactivation of the cabin pressurization system, conversion of the cargo compartment to a class 'E' compartment, and modification of the ventilation system. Everts Air Cargo
- [STC SA363SO](https://openairdocs.org/stc/SA363SO): Cockpit voice recorder. Delta Airlines Inc
- [STC ST03076AT](https://openairdocs.org/stc/ST03076AT): Descriptive data pertaining to this installation are considered inadequate for duplication in other products. This approval is limited to only the installation made in Boeing 737-700, Serial No. 30754. Installation of executive interior. BE Aerospace
- [STC SA8075SW](https://openairdocs.org/stc/SA8075SW): Installation of fiberglass covering. (M-62 SERIES PT-19) (G-73 SCHWEIZER). Razorback Fabrics Inc
- [STC SA1008WE](https://openairdocs.org/stc/SA1008WE): Installation of Poly-Fiber covering material. Poly-Fiber Inc
- [STC SA1368GL](https://openairdocs.org/stc/SA1368GL): Surrendered and incorporated into STC ST334CH. Cooper Aviation Supply Company, Inc
- [STC ST01608CH](https://openairdocs.org/stc/ST01608CH): Installation of brake assemblies, p/n 9560164-2 or 9560166, with non-asbestos linings, p/ns 5013028 and 5013029. Aircraft Braking Systems Corporation
- [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 ST02166AK](https://openairdocs.org/stc/ST02166AK): Installation of UPS Aviation Technologies, Inc., GX50/60 GPS Navigator, Capstone configured MX20 Multi-Function display, and UAT transceiver. Northern Air Cargo Inc
- [STC SA661SW](https://openairdocs.org/stc/SA661SW): Interior arrangement. Sierra Industries, Inc
- [STC SA2-952](https://openairdocs.org/stc/SA2-952): Installation of fiberglass covering. Razorback Fabrics 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 SA1351WE](https://openairdocs.org/stc/SA1351WE): Replace existing fabric on wings, fuselage, empennage, and/or control surfaces, with Ceconite101 material. (262A Series -12). Ceconite Inc
- [STC ST869SO](https://openairdocs.org/stc/ST869SO): Installation of a swing tail. Aeronautical Engineers, Inc
- [STC ST595SO](https://openairdocs.org/stc/ST595SO): Installation of exhaust system bracket. Atlas Aircraft Corporation
- [STC SA1510CE](https://openairdocs.org/stc/SA1510CE): Engine driven cabin air compressors and associated cabin pressurization controls removed. Petroleum Air Transport, Inc
- [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 ST964SO](https://openairdocs.org/stc/ST964SO): Installation of cargo interior, installation of cargo restraint and modification of pressurization system. Bellomy-Lawson Aviation Inc
- [STC ST974SO](https://openairdocs.org/stc/ST974SO): Installation of extra crew seating and air distribution system. Bellomy-Lawson Aviation Inc
- [STC SA229NW](https://openairdocs.org/stc/SA229NW): Installation of 82 passenger configuration. Pacific Alaska Airlines Inc
- [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 SA181NW](https://openairdocs.org/stc/SA181NW): Installation of bulk liquid cargo tank system. Pacific Alaska Airlines Inc
- [STC SA100NW](https://openairdocs.org/stc/SA100NW): Installation of cargo door, a 6 "G" barrier bulkhead, and a class "E" cargo compartment. Rosembalm Aviation
- [STC ST514SO](https://openairdocs.org/stc/ST514SO): Installation of forward cargo door. Bellomy-Lawson Aviation Inc
- [STC SA157NW](https://openairdocs.org/stc/SA157NW): Installation of bulk liquid cargo tank system. Pacific Alaska Airlines Inc
- [STC SA2861WE](https://openairdocs.org/stc/SA2861WE): Installation of rear cargo door system GA61104. Gary Aircraft Corp
- [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 ST34GL](https://openairdocs.org/stc/ST34GL): Remove cabin pressurization system, modify cabin air heating and ventilating system. Zantop Intn'l Airlines, Inc
- [STC ST523SO](https://openairdocs.org/stc/ST523SO): Installation of forward cargo door. Aeronautical Engineers, Inc

All 93: https://openairdocs.org/model/douglas-dc-6b/stcs.md

## The same model under other registry codes

Amateur-built copies and renamed makers get their own codes.

- [Cessna DC6B](https://openairdocs.org/model/cessna-dc6b): 0 registered aircraft, registry code 2070403

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