# NTSB investigations: Dehavilland DHC-6 TWIN OTTER

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

Page 1 of 2 · 64 cases

## Latest cases

- [NTSB ERA25LA222](https://openairdocs.org/ntsb/ERA25LA222.md): Dehavilland DHC-6 Twin Otter · Tullahoma, TN · Accident · Serious injuries · Class 3 · Limited · Preliminary report · Jun 8, 2025 · N166DH · Substantial damage
  > On June 8, 2025, about 1220 central daylight time, a DeHavilland DHC-6 Twin Otter, N166DH, was involved in an accident near Tullahoma, Tennessee. The commercial pilot and five passengers were seriously injured, and 15 passengers were not injured. The flight…
- [NTSB GAA20CA021](https://openairdocs.org/ntsb/GAA20CA021.md): Wingtip To Wingtip Panzl S-330 · Cedartown, GA · Accident · No injuries · Data collection · Final report · Oct 11, 2019 · N540ML · 2 aircraft · Substantial damage
  > ***This report was modified on June 4, 2020. Please see the docket for this accident to view the original report.*** The departing pilot's failure to see and avoid the arriving airplane as it was turning off the runway from which the departing pilot was…
- [NTSB GAA16CA184](https://openairdocs.org/ntsb/GAA16CA184.md): Dehavilland DHC 6 Twin Otter · Fentress, TX · Accident · No injuries · Data collection · Final report · Apr 9, 2016 · N122PM · Substantial damage
  > The pilot's failure to maintain directional control during the aborted landing in gusty crosswind conditions, which resulted in a runway excursion and a collision with a tree.
- [NTSB ERA15LA124](https://openairdocs.org/ntsb/ERA15LA124.md): Dehavilland DHC 6 Twin Otter · Sebastian, FL · Accident · No injuries · Limited investigation · Final report · Feb 9, 2015 · N30EA · 2 aircraft · Substantial damage
  > The pilot's failure to conduct all of the required items on the Before Starting Engines checklist, which resulted in her failure to detect an open hydraulic circuit breaker and led to insufficient hydraulic pressure to operate the airplane's brakes, her…
- [NTSB ERA14CA419](https://openairdocs.org/ntsb/ERA14CA419.md): Dehavilland DHC 6 Twin Otter · Pepperell, MA · Accident · No injuries · Data collection · Final report · Aug 23, 2014 · N202EH · Substantial damage
  > An inadvertent collision with a bird, which resulted in substantial damage to the left wing.
- [NTSB ERA09LA344](https://openairdocs.org/ntsb/ERA09LA344.md): Dehavilland DHC-6 Twin · Orange, VA · Accident · Serious injuries · Limited investigation · Final report · Jun 13, 2009 · N204EH · No damage
  > The pilot's improper decision to perform a low-level maneuver over a populated skydive landing area and his inadequate visual lookout.
- [NTSB NYC08FA218](https://openairdocs.org/ntsb/NYC08FA218.md): Dehavilland DHC6 · Hyannis, MA · Accident · 1 fatal · Field investigation · Final report · Jun 18, 2008 · N656WA · Substantial damage
  > The pilot's failure to remove the flight control lock prior to takeoff. Contributing to the accident was the Federal Aviation Administration's failure to issue an airworthiness directive making the manufacturer's previously-issued flight control lock service…
- [NTSB CHI06FA210](https://openairdocs.org/ntsb/CHI06FA210.md): de Havilland DHC-6-100 · Sullivan, MO · Accident · 6 fatal · Class 1 · Field · Final report · Jul 29, 2006 · N203E · Substantial damage
  > the pilot's failure to maintain airspeed following a loss of power in the right engine due to the fracturing of compressor turbine blades for undetermined reasons. Contributing to some parachutists' injuries was the lack of a more effective restraint system…
- [NTSB IAD05LA073](https://openairdocs.org/ntsb/IAD05LA073.md): de Havilland DHC-6 · Rittman, OH · Accident · Serious injuries · Limited investigation · Final report · Jun 4, 2005 · N3434 · Substantial damage
  > The pilot's improper flare and recovery from a bounced landing, which resulted in a stall and subsequent impact with the ground.
- [NTSB MIA05LA096](https://openairdocs.org/ntsb/MIA05LA096.md): de Havilland DHC-6 · Deland, FL · Accident · 1 fatal · Limited investigation · Final report · Apr 23, 2005 · N24HV · Substantial damage
  > The pilot's inadequate visual lookout.
- [NTSB ANC05LA025](https://openairdocs.org/ntsb/ANC05LA025.md): de Havilland DHC-6-200 · Toksook Bay, AK · Accident · No injuries · Limited investigation · Final report · Jan 27, 2005 · N201EH · Substantial damage
  > The pilot's inadequate compensation for the gusty crosswind wind condition, which resulted in a loss of control during the landing roll, and the collapse of the nose landing gear. Factors associated with the accident were the crosswind and wind gusts.
- [NTSB ANC02LA079](https://openairdocs.org/ntsb/ANC02LA079.md): de Havilland DHC-6 · Toksook Bay, AK · Accident · No injuries · Limited investigation · Final report · Jul 13, 2002 · N885EA · Substantial damage
  > A bird strike during takeoff, which resulted in damage to the right wing.
- [NTSB CHI01LA167](https://openairdocs.org/ntsb/CHI01LA167.md): de Havilland DHC-6 Twin Otter · Ottawa, IL · Accident · Serious injuries · Limited investigation · Final report · Jun 16, 2001 · N30EA · Minor damage
  > the failure of the passenger to maintain clearance from the windmilling propeller after exiting the airplane.
- [NTSB FTW01LA132](https://openairdocs.org/ntsb/FTW01LA132.md): de Havilland DHC-6 Twin Otter · Fentress, TX · Accident · 1 fatal · Limited investigation · Final report · May 27, 2001 · N125PM · Minor damage
  > the King Air pilot's inadequate in-flight planning/decision in that he failed to remain in the agreed on formation position, resulting in one of his skydiver's contacting the propeller of the de Havilland airplane. A contributing factor was the lack of total…
- [NTSB ATL99LA067](https://openairdocs.org/ntsb/ATL99LA067.md): de Havilland DHC-6-200 · Lantana, FL · Accident · Minor injuries · Limited investigation · Final report · Apr 5, 1999 · N838MA · Substantial damage
  > The pilot's failure to secure the engine oil filler cap during the preflight inspection that resulted the subsequent loss of engine power, and his in-flight decision to attempt a single engine go-around with full wing flaps extended.
- [NTSB MIA98LA031](https://openairdocs.org/ntsb/MIA98LA031.md): de Havilland DHC-6-6 · Elberta, AL · Accident · 1 fatal · Limited investigation · Final report · Nov 8, 1997 · N1022S · Minor damage
  > a passenger's inadvertent encounter with a rotating propeller.
- [NTSB MIA96LA135](https://openairdocs.org/ntsb/MIA96LA135.md): de Havilland DHC-6 · Raeford, NC · Accident · 1 fatal · Limited investigation · Final report · Apr 27, 1996 · N716NC · No damage
  > failure of the passenger to follow the instructions of ground personnel as she exited the aircraft.
- [NTSB FTW95LA309](https://openairdocs.org/ntsb/FTW95LA309.md): de Havilland DHC-6 · Belen, NM · Accident · 1 fatal · Limited investigation · Final report · Jul 23, 1995 · N926MA · No damage
  > The parachutist's failure to follow procedures on exiting the aircraft. A factor was the parachutist's incapacitation due to hitting his head on the doorway floor.
- [NTSB LAX92MA183](https://openairdocs.org/ntsb/LAX92MA183.md): de Havilland DHC-6-200 · Perris, CA · Accident · 16 fatal · Major investigation · Final report · Apr 22, 1992 · N141PV · Destroyed
  > The pilot-in-command's inadvertent feathering of the wrong propeller following an engine power loss, and the failure of the operator to assure that the pilot was provided with adequate training in the airplane. Factors related to the accident were: water…
- [NTSB LAX91FA052](https://openairdocs.org/ntsb/LAX91FA052.md): de Havilland DHC-6-100 · Perris Valley, CA · Accident · Minor injuries · Field investigation · Final report · Dec 9, 1990 · N121PM · Substantial damage
  > A loss of power on the left engine due to a fatigue failure of a compressor turbine blade leading to further compressor blade damage; a worn power turbine governor throttle cam assembly which led to loss of power on the right engine; and inadequate…
- [NTSB LAX90LA298](https://openairdocs.org/ntsb/LAX90LA298.md): Bell 206B · California City, CA · Accident · No injuries · Limited investigation · Final report · Aug 22, 1990 · N250CA · 2 aircraft · Substantial damage
  > The failure of the helicopter pilot to maintain adequate clearance from the jump aircraft. A factor in the accident was the inability of the jump aircraft pilot to maintain visual contact with the helicopter.
- [NTSB DCA89MA076](https://openairdocs.org/ntsb/DCA89MA076.md): de Havilland DHC-6-300 · Grand Canyon, AZ · Accident · 10 fatal · Class 1 · Major · Final report · Sep 27, 1989 · N75GC · Destroyed
  > Improper pilot techniques and crew coordination during the landing attempt, bounce, and attempted go-around.
- [NTSB ANC89LA168](https://openairdocs.org/ntsb/ANC89LA168.md): de Havilland DHC-6 · Sleepy Bay, AK · Accident · No injuries · Limited investigation · Final report · Sep 19, 1989 · N851TB · Substantial damage
  > Selection of unsuitable terrain (water condition) by the pilot. The rough water condition was a related factor.
- [NTSB ANC89IA059](https://openairdocs.org/ntsb/ANC89IA059.md): De Havilland DHC-6-100 · Barrow, AK · Incident · No injuries · Incident investigation · Final report · Apr 14, 1989 · N100AP · No damage
  > The propagation of a fatigue crack from multiple origins due to manufacturing defects in the elevator bellcrank mounting quadrant.
- [NTSB ANC89LA021](https://openairdocs.org/ntsb/ANC89LA021.md): de Havilland DHC-6 · Homer, AK · Accident · No injuries · Limited investigation · Final report · Dec 4, 1988 · N525EH · Substantial damage
  > After landing, the plt was advised to taxi to the ramp via the south taxiway, since this was the only taxiway that had been snow plowed. Only about a 12 ft width of the 80 ft wide taxiway had been plowed. The cleared portion was on the outer edge of the…
- [NTSB BFO88FA067](https://openairdocs.org/ntsb/BFO88FA067.md): de Havilland DHC-6-200 · Chantilly, VA · Accident · 1 fatal · Field investigation · Final report · Jul 20, 1988 · N7267 · Destroyed
  > The pilot inadvertently misused the flaps, by failing to set the flaps to the proper setting. The flaps were set full down. This caused the aircraft to pitch up steeply after liftoff. Additionally, the flight control lock was probably installed during some…
- [NTSB LAX88LA226](https://openairdocs.org/ntsb/LAX88LA226.md): de Havilland DHC-6-100 · Tau, Antarctica · Accident · Serious injuries · Limited investigation · Final report · Jun 17, 1988 · N202RH · Destroyed
  > The captain, who was flying the twin otter from the right seat, entered a right hand traffic pattern for landing. A left quartering, 15 knot headwind, was gusting across the airport. Upon turning to the final approach the captain reduced the aircraft's engine…
- [NTSB ATL88LA083](https://openairdocs.org/ntsb/ATL88LA083.md): de Havilland DHC-6-200 · Charlotte, NC · Accident · Serious injuries · Limited investigation · Final report · Jan 20, 1988 · N996SA · Substantial damage
  > During the final approach on the instrument landing system, the pilot descended below the glidepath. The aircraft collided with a tree and struck the ground short of the runway threshold.
- [NTSB LAX87FA290](https://openairdocs.org/ntsb/LAX87FA290.md): de Havilland DHC-6 · Palmdale, CA · Accident · No injuries · Field investigation · Final report · Aug 4, 1987 · N931MA · 2 aircraft · Substantial damage
  > A Dehavilland DHC-6, N931MA, operating as transworld express flt 7591 (twe 7591) & a Cessna 172N, N737EV, collided abt 10 miles west/southwest of Palmdale, CA at abt 5500 ft MSL. Twe 7591 was descending on a 355 deg mag heading; N737EV was level and was…
- [NTSB DCA86AA028](https://openairdocs.org/ntsb/DCA86AA028.md): de Havilland DHC-6-300 · Grand Canyon, AZ · Accident · 25 fatal · Final report · Jun 18, 1986 · N76GC · 2 aircraft · Destroyed
  > At about 0933 MST, Dehavilland DHC-6, N76GC, (owned & operated by Canyon airlines) & bell 206B, N6TC, (operated by heliteck) collided while on sightseeing flts over the Grand Canyon national park. After colliding in flt, both acft crashed & burned in the…
- [NTSB ANC86LA025](https://openairdocs.org/ntsb/ANC86LA025.md): de Havilland DHC-6 · Mekoryuk, AK · Accident · No injuries · Limited investigation · Final report · Feb 7, 1986 · N204EH · Substantial damage
  > The PIC stated that he was landing to the southwest because the fog was obscuring the apch path to rwy 05. After aligning with rwy 23, the acft drifted off course. The plt was attempting to realign the acft with the rwy when he touched down in a bank and…
- [NTSB NYC86FA006](https://openairdocs.org/ntsb/NYC86FA006.md): de Havilland DHC-6 · Homer City, PA · Accident · 1 fatal · Field investigation · Final report · Oct 12, 1985 · N3257 · Destroyed
  > The acft was observed flying at low altitude along about a 5 mile distance. Some witnesses described the acft altitude as just above treetops. Witness heard engine sounds and saw lights on the acft. The acft flight was on a southeast direction before it…
- [NTSB CHI85LA151](https://openairdocs.org/ntsb/CHI85LA151.md): de Havilland DHC-6-200 · Grand Rapids, MI · Accident · No injuries · Limited investigation · Final report · Apr 3, 1985 · N3434 · Substantial damage
  > The 14 CFR 135 pilot with light load of cargo was taking offof 10000 x 150 ft runway pilot said rt engine lost power he reduced power to ld was 50 ft AGL and bounced on second touchdown acft dept runway at 45 angle nose gear broke off in sod wind was 30 off…
- [NTSB ANC85FA054](https://openairdocs.org/ntsb/ANC85FA054.md): de Havilland DHC-6-300 · Barter Island, AK · Accident · Serious injuries · Field investigation · Final report · Mar 12, 1985 · N540N · Substantial damage
  > Acft crashed during missed apch to temporary winter landing strip. Acft hit in steep nose down attitude. Marginal wx conditions prevailed, with icing reported.
- [NTSB LAX84LA307](https://openairdocs.org/ntsb/LAX84LA307.md): De Havilland DHC 6-300 · Tau, Manu'A, HI · Accident · No injuries · Limited investigation · Final report · May 12, 1984 · N28SP · Substantial damage
  > According to the pilot, upon arrival in the vicinity of the arpt it was determined that the windsock indicated southeasterly winds at 15 to 20 KTS. This, plus light to moderate turbulence encountered in the traffic pattern led the crew to fly a slightly…
- [NTSB FTW83LA177](https://openairdocs.org/ntsb/FTW83LA177.md): de Havilland DHC-6 · Mckinney, TX · Accident · 1 fatal · Limited investigation · Final report · Apr 3, 1983 · N927BA · No damage
  > Three observers accompanied the aircrew & other passengers on a flt to transport skydivers aloft. Prior to the flt, all 3 of the observers were briefed not to exit the acft until the engines were secured. However, 1 of the 3 discussed the need to move a…
- [NTSB DCA83AA017](https://openairdocs.org/ntsb/DCA83AA017.md): de Havilland DHC-6-300 · Hailey, ID · Accident · Serious injuries · Final report · Feb 15, 1983 · N361V · Destroyed
  > The acft was less than 2 miles from the arpt of intended landing during the approach when the crew experienced a loss ofelevator control. The acft started diving toward the ground when the power was reduced. The plt applied full power to try and restore level…
- [NTSB ANC82IA048](https://openairdocs.org/ntsb/ANC82IA048.md): De Havilland DHC-6-100 · Near Port Heide, AK · Incident · No injuries · Incident investigation · Final report · Jun 16, 1982 · N525N · Minor damage
  > While in cruise flight, the left engine surged twice and the pilot observed fire emitting from the exhaust and cowling. After securing the engine and discharging the fire bottle without effect, the pilot made a precautionary landing at Port heiden airport.…
- [NTSB DCA82AA022](https://openairdocs.org/ntsb/DCA82AA022.md): de Havilland DHC-6-200 · Hooper Bay, AK · Accident · Serious injuries · Final report · May 16, 1982 · N103AQ · Destroyed
  > At 0833 adt, the acft departed bethel, AK on a scheduled pax/cargo commuter flt to chevak, scammon bay & Hooper Bay, AK. The operator's commuter flts had not landed at scammon bay for svrl days since the rwy was soft & muddy from meltingsnow. Bfr departing…
- [NTSB FTW80IA003](https://openairdocs.org/ntsb/FTW80IA003.md): Dehailland DHC6 · Houston, TX · Incident · No injuries · Closed · Oct 4, 1979 · N926MA · Minor damage
- [NTSB DCA79AA019](https://openairdocs.org/ntsb/DCA79AA019.md): Dehavilland DHC-6 · Hyannis, MA · Accident · 1 fatal · Closed · Jun 17, 1979 · N383EX · Destroyed
- [NTSB DCA79AA018](https://openairdocs.org/ntsb/DCA79AA018.md): Dehavilland DHC-6 · Rockland, ME · Accident · 17 fatal · Closed · May 30, 1979 · N68DE · Destroyed
- [NTSB ANC79DA036](https://openairdocs.org/ntsb/ANC79DA036.md): Dehavilland DHC-6 · Anaktuvuk Pass, AK · Accident · No injuries · Closed · Jan 28, 1979 · N851TB · Substantial damage
- [NTSB DCA79AA003](https://openairdocs.org/ntsb/DCA79AA003.md): Dehavilland DHC-6 · Steamboat Spgs, CO · Accident · 2 fatal · Closed · Dec 4, 1978 · N25RM · Destroyed
- [NTSB NYC79DFA04|NYC79FFA04](https://openairdocs.org/ntsb/NYC79DFA04%7CNYC79FFA04.md): Dehavilland DHC-6 · Watertown, NY · Accident · Minor injuries · Closed · Dec 2, 1978 · N59AN · 2 aircraft · Substantial damage
- [NTSB ANC79FA004](https://openairdocs.org/ntsb/ANC79FA004.md): Dehavnd Can DHC-6 · Barrow, AK · Accident · 1 fatal · Closed · Oct 13, 1978 · N4048B · Substantial damage
- [NTSB DEN78FA020](https://openairdocs.org/ntsb/DEN78FA020.md): Dehavilland DHC-6 · Pueblo, CO · Accident · 3 fatal · Closed · Jan 18, 1978 · N982FL · Destroyed
- [NTSB DCA77AA026](https://openairdocs.org/ntsb/DCA77AA026.md): Dehavilland DHC-6 · Iliamna, AK · Accident · 13 fatal · Closed · Sep 6, 1977 · N563MA · Destroyed
- [NTSB ANC77DA035](https://openairdocs.org/ntsb/ANC77DA035.md): Dehavilland DHC-6 · Emmonak, AK · Accident · No injuries · Closed · Mar 9, 1977 · N2714R · Substantial damage
- [NTSB LAX77FA017](https://openairdocs.org/ntsb/LAX77FA017.md): Dehavilland DHC-6 · Los Angeles, CA · Accident · No injuries · Closed · Dec 29, 1976 · N66191 · 2 aircraft · Substantial damage

Next page: https://openairdocs.org/ntsb.md?model=2802606&page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
SELECT c."ntsbNumber", c."eventDate", c."eventType", c."eventCity", c."eventStateOrRegion", a.n_number, a."aircraftMake", a."aircraftModel", c."highestInjuryLevel", c."totalFatal", c."completionStatus", c.report_url
FROM 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c LEFT JOIN 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' a ON a.case_mkey = c."mKey" AND a.position = 1
WHERE c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.aircraft_model_code IN ('2802606'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?model=2802606

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