# Fatal NTSB investigations: Allison 250 SER 250HP 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. ## Latest cases - [NTSB CEN24FA049](https://openairdocs.org/ntsb/CEN24FA049.md): MD Helicopters 600 · Sterling City, TX · Accident · 2 fatal · Class 3 · Field · Final report · Nov 29, 2023 · N745MB · Substantial damage > The 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 CEN20LA328](https://openairdocs.org/ntsb/CEN20LA328.md): Bell 206 · Marathon, TX · Accident · 3 fatal · Class 3 · Limited · Final report · Aug 8, 2020 · N284S · Destroyed > The in-flight loss of helicopter control for reasons that could not be determined based on the available evidence. - [NTSB WPR17FA021](https://openairdocs.org/ntsb/WPR17FA021.md): Hughes 369 · Pukoo, HI · Accident · 2 fatal · Field investigation · Final report · Nov 16, 2016 · N81GG · Destroyed > The 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 CEN16FA171](https://openairdocs.org/ntsb/CEN16FA171.md): Mcdonnell Douglas Helicopter 369E · Reedsville, WI · Accident · 1 fatal · Field investigation · Final report · May 4, 2016 · N629JK · Substantial damage > The 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 WPR14FA310](https://openairdocs.org/ntsb/WPR14FA310.md): Bell 206A · Wenatchee, WA · Accident · 1 fatal · Field investigation · Final report · Jul 23, 2014 · N949FM · Substantial damage > The 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 WPR13FA119](https://openairdocs.org/ntsb/WPR13FA119.md): Bell 206B · Acton, CA · Accident · 3 fatal · Field investigation · Final report · Feb 10, 2013 · N59518 · Substantial damage > The 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 CEN11GA020](https://openairdocs.org/ntsb/CEN11GA020.md): Bell 206B · Clarkson Valley, MO · Accident · 1 fatal · Final report · Oct 15, 2010 · N96MP · Substantial damage > The 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 CEN10LA431](https://openairdocs.org/ntsb/CEN10LA431.md): Bell 47G-4A · Rochester, MN · Accident · 1 fatal · Limited investigation · Final report · Jul 24, 2010 · N124SH · Substantial damage > The 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 DCA08WA059](https://openairdocs.org/ntsb/DCA08WA059.md): Bell 206 L-1 · Muanda, Congo - Kinshasa · Accident · 1 fatal · Foreign investigation · May 9, 2008 · N5014V · Destroyed - [NTSB SEA07LA021](https://openairdocs.org/ntsb/SEA07LA021.md): Hughes 369E · Jensen, UT · Accident · 1 fatal · Limited investigation · Final report · Nov 21, 2006 · N500FU · Substantial damage > The 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 CHI06FA173](https://openairdocs.org/ntsb/CHI06FA173.md): Bell 206B · Walford, IA · Accident · 1 fatal · Field investigation · Final report · Jun 30, 2006 · N2877F · Destroyed > The pilot's failure to maintain clearance from powerlines. The powerlines were a factor. - [NTSB FTW04FA186](https://openairdocs.org/ntsb/FTW04FA186.md): Bell 206 L-1 · Cameron, LA · Accident · 1 fatal · Field investigation · Final report · Jul 17, 2004 · N1078C · Destroyed > The helicopter's in-flight collision with water for undetermined reasons. - [NTSB FTW04FA029](https://openairdocs.org/ntsb/FTW04FA029.md): Bell 407 · High Island 573 · Accident · 1 fatal · Field investigation · Final report · Dec 1, 2003 · N457PH · Destroyed > The loss of engine power due to the failure of the 3rd stage turbine wheel and subsequent catastrophic failure of the turbine assembly. - [NTSB SEA04LA005](https://openairdocs.org/ntsb/SEA04LA005.md): Bell 206B · Swisshome, OR · Accident · 2 fatal · Limited investigation · Final report · Oct 14, 2003 · N86W · Substantial damage > The 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 CHI03FA259](https://openairdocs.org/ntsb/CHI03FA259.md): Bell 206L-3 · E.I. 276, LA · Accident · 3 fatal · Field investigation · Final report · Aug 13, 2003 · N41128 · Substantial damage > The 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 ATL02FA062](https://openairdocs.org/ntsb/ATL02FA062.md): Eurocopter France AS355 F1 · Savannah, GA · Accident · 2 fatal · Field investigation · Final report · Mar 9, 2002 · N355D · Substantial damage > The 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 ATL02FA003](https://openairdocs.org/ntsb/ATL02FA003.md): Bell 206B · N. Wilkesboro, NC · Accident · 2 fatal · Field investigation · Final report · Oct 22, 2001 · N8104J · Destroyed > The 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 FTW01FAMS1](https://openairdocs.org/ntsb/FTW01FAMS1.md): Bell 206B · High Island 116 · Accident · 1 fatal · Missing aircraft · Final report · Dec 27, 2000 · N83137 · Destroyed > undetermined, missing aircraft. - [NTSB CHI00FA266](https://openairdocs.org/ntsb/CHI00FA266.md): Fairchild Hiller FH-1100 · Valparaiso, IN · Accident · 1 fatal · Field investigation · Final report · Aug 19, 2000 · N250AD · Destroyed > The 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 MIA00FA003](https://openairdocs.org/ntsb/MIA00FA003.md): Bell 206B · Centreville, AL · Accident · 2 fatal · Field investigation · Final report · Oct 5, 1999 · N1285S · Destroyed > The 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 NYC99FA140](https://openairdocs.org/ntsb/NYC99FA140.md): Sikorsky S-76A · Jackson, KY · Accident · 4 fatal · Field investigation · Final report · Jun 15, 1999 · N2743E · Destroyed > the failure of the PIC to adequately supervise the SIC, and maintain a positive climb. Factors were the fog and dark night. - [NTSB IAD97FA123](https://openairdocs.org/ntsb/IAD97FA123.md): Fairchild Hiller FH-1100 · Pittsfield, MA · Accident · 1 fatal · Field investigation · Final report · Sep 27, 1997 · N5045F · Destroyed > The 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 MIA97FA070](https://openairdocs.org/ntsb/MIA97FA070.md): Bell 206-B3 · Fort Lauderdale, FL · Accident · 4 fatal · Field investigation · Final report · Jan 23, 1997 · N2047R · Destroyed > The pilot's incapacitation by carbon monoxide from undetermined sources which led to his diminished ability to see and avoid a radio tower. - [NTSB LAX93LA104](https://openairdocs.org/ntsb/LAX93LA104.md): Fairchild Hiller FH-1100 · Volcano Natl Pk, HI · Accident · 4 fatal · Limited investigation · Final report · Jan 25, 1993 · N427FH · Destroyed > A 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 SEA93FA048](https://openairdocs.org/ntsb/SEA93FA048.md): Bell 206B3 · Ogden, UT · Accident · 4 fatal · Field investigation · Final report · Jan 3, 1993 · N1078V · Destroyed > The 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 FTW89FA133](https://openairdocs.org/ntsb/FTW89FA133.md): Aerospatiale AS-350-D · Galveston, TX · Accident · 2 fatal · Field investigation · Final report · Jul 11, 1989 · N3595B · 2 aircraft · Destroyed > Failure of both pilots to see-and-avoid the other aircraft (inadequate visual lookout). - [NTSB BFO87FA057](https://openairdocs.org/ntsb/BFO87FA057.md): Bell 206B · Washington, DC · Accident · 3 fatal · Field investigation · Final report · Aug 21, 1987 · N83080 · Destroyed > The 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 LAX87LA199](https://openairdocs.org/ntsb/LAX87LA199.md): Hughes 369D · Tamunings · Accident · 2 fatal · Limited investigation · Final report · Apr 29, 1987 · N10995 · Destroyed > A 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 ATL87MA035](https://openairdocs.org/ntsb/ATL87MA035.md): Bell 206L-1 · Jamestown, TN · Accident · 4 fatal · Major investigation · Final report · Dec 3, 1986 · N3898U · Destroyed > The 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 LAX86FJA06](https://openairdocs.org/ntsb/LAX86FJA06.md): Bell 206B · Maui, HI · Accident · 2 fatal · Final report · May 18, 1986 · N244WC · Destroyed > The 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 FTW86LA032](https://openairdocs.org/ntsb/FTW86LA032.md): Sikorsky S-76A · Grand Isle Bl73 · Accident · 3 fatal · Limited investigation · Final report · Jan 5, 1986 · N7612L · Substantial damage > The 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 LAX85FA315](https://openairdocs.org/ntsb/LAX85FA315.md): Bell 206-B · Page, AZ · Accident · 2 fatal · Field investigation · Final report · Jul 12, 1985 · N38942 · Destroyed > On 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 DEN85FA027](https://openairdocs.org/ntsb/DEN85FA027.md): Bell 206B-11 · Bingham Canyon, UT · Accident · 4 fatal · Field investigation · Final report · Nov 15, 1984 · N1077T · Destroyed > Pilot 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 NYC84FA009](https://openairdocs.org/ntsb/NYC84FA009.md): Bell 206B III · Hudson, NH · Accident · 1 fatal · Field investigation · Final report · Oct 18, 1983 · N5011N · Destroyed > The 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 ANC83FA032](https://openairdocs.org/ntsb/ANC83FA032.md): Bell 206B · Cordova, AK · Accident · 1 fatal · Field investigation · Final report · Jan 13, 1983 · N74PR · Destroyed > The 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 FTW83FA066](https://openairdocs.org/ntsb/FTW83FA066.md): Bell 206B · San Antonio, TX · Accident · 3 fatal · Field investigation · Final report · Dec 23, 1982 · N206H · Destroyed > The 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 FTW82FA204](https://openairdocs.org/ntsb/FTW82FA204.md): Bell 206B · Fairfield, TX · Accident · 2 fatal · Field investigation · Final report · May 31, 1982 · N1482W · Destroyed > Witnesses 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 LAX82FA014](https://openairdocs.org/ntsb/LAX82FA014.md): Bell 206B · Napa, CA · Accident · 1 fatal · Closed · Nov 12, 1981 · N49756 · Destroyed - [NTSB FTW81FA023](https://openairdocs.org/ntsb/FTW81FA023.md): Bell 206B · Norman, OK · Accident · 5 fatal · Closed · Jan 9, 1981 · N10785 · Destroyed - [NTSB MIA80FA039](https://openairdocs.org/ntsb/MIA80FA039.md): Bell 206B · Kissimmee, FL · Accident · 2 fatal · Closed · Feb 29, 1980 · N5015Y · Destroyed - [NTSB FTW80FA030](https://openairdocs.org/ntsb/FTW80FA030.md): Bell 206B · Montegut, LA · Accident · 1 fatal · Closed · Jan 3, 1980 · N30TA · 2 aircraft · Destroyed - [NTSB CHI79DA039](https://openairdocs.org/ntsb/CHI79DA039.md): Hughes 369D · Pekin, IL · Accident · 1 fatal · Closed · Apr 2, 1979 · N8629F · Substantial damage - [NTSB SEA77FYA28](https://openairdocs.org/ntsb/SEA77FYA28.md): Hughes 369HS · American Falls, ID · Accident · 1 fatal · Closed · Jul 9, 1977 · N9224F · Destroyed - [NTSB FTW76AF101](https://openairdocs.org/ntsb/FTW76AF101.md): Bolkow BO105C · Intracoastal, LA · Accident · 1 fatal · Closed · Jun 13, 1976 · N149BB · Substantial damage - [NTSB NYC74AN046](https://openairdocs.org/ntsb/NYC74AN046.md): Bell 206A · Webster, PA · Accident · 1 fatal · Closed · Nov 20, 1973 · N461NC · 2 aircraft · Destroyed - [NTSB SEA72AS053](https://openairdocs.org/ntsb/SEA72AS053.md): Hiller Acft FH1100 · Tacoma, WA · Accident · 1 fatal · Closed · Jun 8, 1972 · N5044F · Substantial damage - [NTSB ANC71AA009](https://openairdocs.org/ntsb/ANC71AA009.md): Bell 206A · Fairbanks, AK · Accident · 1 fatal · Closed · Aug 1, 1970 · N6253N · Substantial damage - [NTSB FTW68A0079](https://openairdocs.org/ntsb/FTW68A0079.md): Bell 206A · Saginaw, TX · Accident · 1 fatal · Closed · Mar 13, 1968 · N6270N · Substantial damage ## 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."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 ``` This list as a web page: https://openairdocs.org/ntsb?engine=03002&fatal=1 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.