Fatal NTSB investigations: Allison 250 SER 250HP
48 cases on aircraft whose registry engine model is Allison 250 SER 250HP. 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
| 1968 | 1 |
|---|---|
| 1970 | 1 |
| 1972 | 1 |
| 1973 | 1 |
| 1976 | 1 |
| 1977 | 1 |
| 1979 | 1 |
| 1980 | 2 |
| 1981 | 2 |
| 1982 | 2 |
| 1983 | 2 |
| 1984 | 1 |
| 1985 | 1 |
| 1986 | 3 |
| 1987 | 2 |
| 1989 | 1 |
| 1993 | 2 |
| 1997 | 2 |
| 1999 | 2 |
| 2000 | 2 |
| 2001 | 1 |
| 2002 | 1 |
| 2003 | 3 |
| 2004 | 1 |
| 2006 | 2 |
| 2008 | 1 |
| 2010 | 2 |
| 2013 | 1 |
| 2014 | 1 |
| 2016 | 2 |
| 2020 | 1 |
| 2023 | 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.\"highestInjuryLevel\" = 'Fatal'
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03002', '03003'))
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."highestInjuryLevel" = 'Fatal'
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('03002', '03003'))
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 CEN24FA049Accident · 2 fatalClass 3 · FieldFinal reportMD Helicopters 600 · Sterling City, TXThe pilot’s failure to maintain clearance from a power line pole’s static arm during forecasted gusting wind conditions, un-forecasted light turbulence, and un-forecasted low-level wind shear conditions, resulting in main rotor blade contact with the static…NTSB CEN20LA328Accident · 3 fatalClass 3 · LimitedFinal reportBell 206 · Marathon, TXThe in-flight loss of helicopter control for reasons that could not be determined based on the available evidence.NTSB WPR17FA021Accident · 2 fatalField investigationFinal reportHughes 369 · Pukoo, HIThe pilot's decision to continue visual flight into an area of instrument meteorological conditions at night in rain, which resulted in his geographic disorientation and controlled flight into terrain.NTSB CEN16FA171Accident · 1 fatalField investigationFinal reportMcdonnell Douglas Helicopter 369E · Reedsville, WIThe failure of the power turbine governor's dual-spool bearing due to a lack of lubrication, which resulted in a complete loss of engine power and subsequent impact with terrain.NTSB WPR14FA310Accident · 1 fatalField investigationFinal reportBell 206A · Wenatchee, WAThe pilot's failure to maintain a proper decent rate and path, which resulted in a hard landing and dynamic rollover. Contributing to the accident was the pilot's impairment by a sedating medication.NTSB WPR13FA119Accident · 3 fatalField investigationFinal reportBell 206B · Acton, CAThe pilot's decision to conduct a flight in dark night conditions with an illuminated cockpit light that degraded his visibility and his ability to identify and arrest the helicopter's descent while maneuvering, which resulted in controlled flight into…NTSB CEN11GA020Accident · 1 fatalFinal reportBell 206B · Clarkson Valley, MOThe total loss of engine power due to fuel exhaustion, which resulted from the pilot's inadequate preflight planning and decision-making, and his improper control inputs following the loss of engine power, which resulted in mast bumping and separation of the…NTSB CEN10LA431Accident · 1 fatalLimited investigationFinal reportBell 47G-4A · Rochester, MNThe total loss of engine power due to a high-cycle fatigue fracture of a first-stage compressor blade. The reason for the fracture could not be determined during postaccident examination.NTSB DCA08WA059Accident · 1 fatalForeign investigationBell 206 L-1 · Muanda, Congo - KinshasaNTSB SEA07LA021Accident · 1 fatalLimited investigationFinal reportHughes 369E · Jensen, UTThe pilot's failure to maintain clearance with the transmission wires due to an inadquate visual lookout while maneuvering during a search and rescue flight.NTSB CHI06FA173Accident · 1 fatalField investigationFinal reportBell 206B · Walford, IAThe pilot's failure to maintain clearance from powerlines. The powerlines were a factor.NTSB FTW04FA186Accident · 1 fatalField investigationFinal reportBell 206 L-1 · Cameron, LAThe helicopter's in-flight collision with water for undetermined reasons.NTSB FTW04FA029Accident · 1 fatalField investigationFinal reportBell 407 · High Island 573The loss of engine power due to the failure of the 3rd stage turbine wheel and subsequent catastrophic failure of the turbine assembly.NTSB SEA04LA005Accident · 2 fatalLimited investigationFinal reportBell 206B · Swisshome, ORThe pilot's failure to maintain clearance from power lines while maneuvering. The power line, mountainous terrain with high obstructions (thick trees and underbrush) and the operators failure to maintain a "hazard map" as indicated in their procedures manual…NTSB CHI03FA259Accident · 3 fatalField investigationFinal reportBell 206L-3 · E.I. 276, LAThe inadequate compensation for crosswind conditions and the directional control not obtained/maintained by the pilot during takeoff. Contributing factors were the crosswind and the planned approach to position the helicopter with a crosswind in order to…NTSB ATL02FA062Accident · 2 fatalField investigationFinal reportEurocopter France AS355 F1 · Savannah, GAThe pilot's failure to follow operating procedures and, experienced spatial disorientation while attempting a night landing to an offshore platform. A factor was a dark night.NTSB ATL02FA003Accident · 2 fatalField investigationFinal reportBell 206B · N. Wilkesboro, NCThe pilot's failure to maintain visual lookout and clearance above obstacles, which resulted in a collision with power lines and subsequent loss of control and collision with terrain.NTSB FTW01FAMS1Accident · 1 fatalMissing aircraftFinal reportBell 206B · High Island 116undetermined, missing aircraft.NTSB CHI00FA266Accident · 1 fatalField investigationFinal reportFairchild Hiller FH-1100 · Valparaiso, INThe in-flight fracture of the main rotor mast and the separation of the main rotor. Factors to the accident were the corroded main rotor mast that resulted in fatigue.NTSB MIA00FA003Accident · 2 fatalField investigationFinal reportBell 206B · Centreville, ALThe pilot's inadequate preflight inspection of the helicopter's fuel system resulting in an in-flight loss of engine power due to fuel exhaustion as a result of overboard porting of fuel when the airframe fuel filter was left in the 'drain and locked'…NTSB NYC99FA140Accident · 4 fatalField investigationFinal reportSikorsky S-76A · Jackson, KYthe failure of the PIC to adequately supervise the SIC, and maintain a positive climb. Factors were the fog and dark night.NTSB IAD97FA123Accident · 1 fatalField investigationFinal reportFairchild Hiller FH-1100 · Pittsfield, MAThe first pilot's improper procedures for an autorotation, and improper flare which resulted in a hard landing. Also causal was the second pilot's inadequate remedial action.NTSB MIA97FA070Accident · 4 fatalField investigationFinal reportBell 206-B3 · Fort Lauderdale, FLThe pilot's incapacitation by carbon monoxide from undetermined sources which led to his diminished ability to see and avoid a radio tower.NTSB LAX93LA104Accident · 4 fatalLimited investigationFinal reportFairchild Hiller FH-1100 · Volcano Natl Pk, HIA loss of tail rotor control for an undetermined reason(s). A factor which contributed to the accident was the pilot's choice of a hover altitude/position inadequate to reach a shoreline in the event of an emergency. A factor which contributed to the severity…NTSB SEA93FA048Accident · 4 fatalField investigationFinal reportBell 206B3 · Ogden, UTThe pilot's continuation of VFR flight into instrument meteorological conditions, and his decision to continue his landing attempts under the adverse weather conditions. Factors contributing to the accident were the low clouds, fog and mountainous terrain.NTSB FTW89FA133Accident · 2 fatalField investigationFinal reportAerospatiale AS-350-D · Galveston, TXFailure of both pilots to see-and-avoid the other aircraft (inadequate visual lookout).NTSB BFO87FA057Accident · 3 fatalField investigationFinal reportBell 206B · Washington, DCThe helicopter was on a LCL photography (sight-seeing) flt. While hovering at aprx 200' abv the potomac river, the eng lost pwr. The plt initiated an autorotation & deployed the emerg floats. Subsequently, the helicopter impacted in the river & rolled ovr,…NTSB LAX87LA199Accident · 2 fatalLimited investigationFinal reportHughes 369D · TamuningsA Hughes 369D, operated off of a fishing vessel, went out of control and crashed in the pacific ocean, nr guam. The accident was witnessed by the ship's captain. His statement indicated one of the main rotor blades separated in flt while the helo was orbiting…NTSB ATL87MA035Accident · 4 fatalMajor investigationFinal reportBell 206L-1 · Jamestown, TNThe helicopter was being used in an emerg med svc/med-evac (EMS) opn. At 0230, the plt obtained a partial wx briefing. He was advised of flt prctns for IFR wx thru-out the area with low ceilings, fog, precip & mtns obscd. The flt departed nashville at 0245 &…NTSB LAX86FJA06Accident · 2 fatalFinal reportBell 206B · Maui, HIThe acft collided with powerlines while carrying pass'g on a sightseeing flt through a canyon. The wires across the canyon were EST to be 1700 long with height AGL unknown. The wires were unmarked and were 1/2 in dia aluminum. One of the passengers was…NTSB FTW86LA032Accident · 3 fatalLimited investigationFinal reportSikorsky S-76A · Grand Isle Bl73The acft rolled over in a high x-wind after landing while deplaning passengers. The acft had landed on a moving barge. A landing into the wind was blocked by a crane so the plt sideslipped from a flt path that paralleled the ships movement. The wind was…NTSB LAX85FA315Accident · 2 fatalField investigationFinal reportBell 206-B · Page, AZOn July 12, 1984, a Bell 206B helicopter collided with a steel bridge 10 miles so of Page, AZ. The helicopter was being filmed in flt during the making of a movie. VMC existed at the time. The helicopter was destroyed and the plt and pax, an italian actor,…NTSB DEN85FA027Accident · 4 fatalField investigationFinal reportBell 206B-11 · Bingham Canyon, UTPilot was taking passeengers on a sightseeng flight over the kennecott copper mine, largest open pit copper mine in the world. Helicopter collided with unmarked power lines approx 185 ft AGL. Power lines are supported by two unmarked towers on opposing hills…NTSB NYC84FA009Accident · 1 fatalField investigationFinal reportBell 206B III · Hudson, NHThe plt was on a flt to pick up film for a tv station. While en route, he made a mayday call to the manchester control tower. According to witnesses, the acft was proceeding in a northerly direction at about 700 to 1000 ft AGL when they heard a 'muffled pop.'…NTSB ANC83FA032Accident · 1 fatalField investigationFinal reportBell 206B · Cordova, AKThe helicopter was on a rescue/recovery flt for the Alaska state troopers with the plt & a state trooper on board. They departed in variable wx conditions to rescue the plt of another acft. Reportedly, snow was falling in the search area & the winds were…NTSB FTW83FA066Accident · 3 fatalField investigationFinal reportBell 206B · San Antonio, TXThe acft departed brackettville at 0715 & at 0740 contacted uvalde UNICOM for their wx. When informed that uvalde was "zero-zero" the flt continued east. The acft was later observed & heard flying above the low indefinite ceiling shortly before impacting the…NTSB FTW82FA204Accident · 2 fatalField investigationFinal reportBell 206B · Fairfield, TXWitnesses observed the helicopter flying northbound while traveling parallel and just east of a north-south highway. Reportedly, it enter an autorotative landing approach, crossed over the highway and impacted in an open field on a westerly heading after…NTSB LAX82FA014Accident · 1 fatalClosedBell 206B · Napa, CANTSB FTW81FA023Accident · 5 fatalClosedBell 206B · Norman, OKNTSB MIA80FA039Accident · 2 fatalClosedBell 206B · Kissimmee, FLNTSB FTW80FA030Accident · 1 fatalClosedBell 206B · Montegut, LANTSB CHI79DA039Accident · 1 fatalClosedHughes 369D · Pekin, ILNTSB SEA77FYA28Accident · 1 fatalClosedHughes 369HS · American Falls, IDNTSB FTW76AF101Accident · 1 fatalClosedBolkow BO105C · Intracoastal, LANTSB NYC74AN046Accident · 1 fatalClosedBell 206A · Webster, PANTSB SEA72AS053Accident · 1 fatalClosedHiller Acft FH1100 · Tacoma, WANTSB ANC71AA009Accident · 1 fatalClosedBell 206A · Fairbanks, AKNTSB FTW68A0079Accident · 1 fatalClosedBell 206A · Saginaw, TX