NTSB investigations: Dehavilland DHC-6 TWIN OTTER
64 cases on aircraft the registry lists as Dehavilland DHC-6 TWIN OTTER. Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 1967 | 1 |
|---|---|
| 1968 | 1 |
| 1969 | 4 |
| 1970 | 2 |
| 1971 | 1 |
| 1972 | 2 |
| 1974 | 1 |
| 1976 | 3 |
| 1977 | 2 |
| 1978 | 4 |
| 1979 | 4 |
| 1982 | 2 |
| 1983 | 2 |
| 1984 | 1 |
| 1985 | 3 |
| 1986 | 2 |
| 1987 | 1 |
| 1988 | 4 |
| 1989 | 3 |
| 1990 | 2 |
| 1992 | 1 |
| 1995 | 1 |
| 1996 | 1 |
| 1997 | 1 |
| 1999 | 1 |
| 2001 | 2 |
| 2002 | 1 |
| 2005 | 3 |
| 2006 | 1 |
| 2008 | 1 |
| 2009 | 1 |
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 1 |
| 2019 | 1 |
| 2025 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB ERA25LA222Accident · Serious injuriesClass 3 · LimitedPreliminary reportDehavilland DHC-6 Twin Otter · Tullahoma, TNOn 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 GAA20CA021Accident · No injuriesData collectionFinal reportWingtip To Wingtip Panzl S-330 · Cedartown, GA***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 GAA16CA184Accident · No injuriesData collectionFinal reportDehavilland DHC 6 Twin Otter · Fentress, TXThe 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 ERA15LA124Accident · No injuriesLimited investigationFinal reportDehavilland DHC 6 Twin Otter · Sebastian, FLThe 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 ERA14CA419Accident · No injuriesData collectionFinal reportDehavilland DHC 6 Twin Otter · Pepperell, MAAn inadvertent collision with a bird, which resulted in substantial damage to the left wing.NTSB ERA09LA344Accident · Serious injuriesLimited investigationFinal reportDehavilland DHC-6 Twin · Orange, VAThe pilot's improper decision to perform a low-level maneuver over a populated skydive landing area and his inadequate visual lookout.NTSB NYC08FA218Accident · 1 fatalField investigationFinal reportDehavilland DHC6 · Hyannis, MAThe 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 CHI06FA210Accident · 6 fatalClass 1 · FieldFinal reportde Havilland DHC-6-100 · Sullivan, MOthe 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 IAD05LA073Accident · Serious injuriesLimited investigationFinal reportde Havilland DHC-6 · Rittman, OHThe pilot's improper flare and recovery from a bounced landing, which resulted in a stall and subsequent impact with the ground.NTSB MIA05LA096Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6 · Deland, FLThe pilot's inadequate visual lookout.NTSB ANC05LA025Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6-200 · Toksook Bay, AKThe 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 ANC02LA079Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6 · Toksook Bay, AKA bird strike during takeoff, which resulted in damage to the right wing.NTSB CHI01LA167Accident · Serious injuriesLimited investigationFinal reportde Havilland DHC-6 Twin Otter · Ottawa, ILthe failure of the passenger to maintain clearance from the windmilling propeller after exiting the airplane.NTSB FTW01LA132Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6 Twin Otter · Fentress, TXthe 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 ATL99LA067Accident · Minor injuriesLimited investigationFinal reportde Havilland DHC-6-200 · Lantana, FLThe 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 MIA98LA031Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6-6 · Elberta, ALa passenger's inadvertent encounter with a rotating propeller.NTSB MIA96LA135Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6 · Raeford, NCfailure of the passenger to follow the instructions of ground personnel as she exited the aircraft.NTSB FTW95LA309Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6 · Belen, NMThe 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 LAX92MA183Accident · 16 fatalMajor investigationFinal reportde Havilland DHC-6-200 · Perris, CAThe 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 LAX91FA052Accident · Minor injuriesField investigationFinal reportde Havilland DHC-6-100 · Perris Valley, CAA 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 LAX90LA298Accident · No injuriesLimited investigationFinal reportBell 206B · California City, CAThe 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 DCA89MA076Accident · 10 fatalClass 1 · MajorFinal reportde Havilland DHC-6-300 · Grand Canyon, AZImproper pilot techniques and crew coordination during the landing attempt, bounce, and attempted go-around.NTSB ANC89LA168Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6 · Sleepy Bay, AKSelection of unsuitable terrain (water condition) by the pilot. The rough water condition was a related factor.NTSB ANC89IA059Incident · No injuriesIncident investigationFinal reportDe Havilland DHC-6-100 · Barrow, AKThe propagation of a fatigue crack from multiple origins due to manufacturing defects in the elevator bellcrank mounting quadrant.NTSB ANC89LA021Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6 · Homer, AKAfter 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 BFO88FA067Accident · 1 fatalField investigationFinal reportde Havilland DHC-6-200 · Chantilly, VAThe 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 LAX88LA226Accident · Serious injuriesLimited investigationFinal reportde Havilland DHC-6-100 · Tau, AntarcticaThe 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 ATL88LA083Accident · Serious injuriesLimited investigationFinal reportde Havilland DHC-6-200 · Charlotte, NCDuring 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 LAX87FA290Accident · No injuriesField investigationFinal reportde Havilland DHC-6 · Palmdale, CAA 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 DCA86AA028Accident · 25 fatalFinal reportde Havilland DHC-6-300 · Grand Canyon, AZAt 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 ANC86LA025Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6 · Mekoryuk, AKThe 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 NYC86FA006Accident · 1 fatalField investigationFinal reportde Havilland DHC-6 · Homer City, PAThe 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 CHI85LA151Accident · No injuriesLimited investigationFinal reportde Havilland DHC-6-200 · Grand Rapids, MIThe 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 ANC85FA054Accident · Serious injuriesField investigationFinal reportde Havilland DHC-6-300 · Barter Island, AKAcft crashed during missed apch to temporary winter landing strip. Acft hit in steep nose down attitude. Marginal wx conditions prevailed, with icing reported.NTSB LAX84LA307Accident · No injuriesLimited investigationFinal reportDe Havilland DHC 6-300 · Tau, Manu'A, HIAccording 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 FTW83LA177Accident · 1 fatalLimited investigationFinal reportde Havilland DHC-6 · Mckinney, TXThree 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 DCA83AA017Accident · Serious injuriesFinal reportde Havilland DHC-6-300 · Hailey, IDThe 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 ANC82IA048Incident · No injuriesIncident investigationFinal reportDe Havilland DHC-6-100 · Near Port Heide, AKWhile 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 DCA82AA022Accident · Serious injuriesFinal reportde Havilland DHC-6-200 · Hooper Bay, AKAt 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 FTW80IA003Incident · No injuriesClosedDehailland DHC6 · Houston, TXNTSB DCA79AA019Accident · 1 fatalClosedDehavilland DHC-6 · Hyannis, MANTSB DCA79AA018Accident · 17 fatalClosedDehavilland DHC-6 · Rockland, MENTSB ANC79DA036Accident · No injuriesClosedDehavilland DHC-6 · Anaktuvuk Pass, AKNTSB DCA79AA003Accident · 2 fatalClosedDehavilland DHC-6 · Steamboat Spgs, CONTSB NYC79DFA04|NYC79FFA04Accident · Minor injuriesClosedDehavilland DHC-6 · Watertown, NYNTSB ANC79FA004Accident · 1 fatalClosedDehavnd Can DHC-6 · Barrow, AKNTSB DEN78FA020Accident · 3 fatalClosedDehavilland DHC-6 · Pueblo, CONTSB DCA77AA026Accident · 13 fatalClosedDehavilland DHC-6 · Iliamna, AKNTSB ANC77DA035Accident · No injuriesClosedDehavilland DHC-6 · Emmonak, AKNTSB LAX77FA017Accident · No injuriesClosedDehavilland DHC-6 · Los Angeles, CA