# 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. Page 3 of 6 · 267 cases ## Cases, newest first - [NTSB ANC98TA162](https://openairdocs.org/ntsb/ANC98TA162.md): Hughes 369D · Homer, AK · Accident · Serious injuries · Final report · Sep 27, 1998 · N1091P · Minor damage > The passenger not following the instructions given by the pilot. Contributing factors were the rising terrain and the pilot's diverted attention during the toe in landing. - [NTSB SEA98LA160](https://openairdocs.org/ntsb/SEA98LA160.md): McDonnell Douglas 369D · Oso, WA · Accident · Minor injuries · Limited investigation · Final report · Aug 10, 1998 · N1096L · Substantial damage > The separation of the 90 degree gearbox and tail rotor assembly for undetermined reasons followed by the inability of the pilot-in-command to maintain control of the rotorcraft. - [NTSB FTW98LA260](https://openairdocs.org/ntsb/FTW98LA260.md): Bell 206B · Corpus Christi, TX · Accident · No injuries · Limited investigation · Final report · Jun 7, 1998 · N16814 · Substantial damage > The failure of the tail rotor drive shaft due to the separation of a bolt at one of the drive shaft disc couplings for an undetermined reason, which resulted in the pilot's inability to maintain directional control during landing. - [NTSB MIA98LA148](https://openairdocs.org/ntsb/MIA98LA148.md): Bell 206L-1 · Orlando, FL · Accident · No injuries · Limited investigation · Final report · Apr 25, 1998 · N60WJ · Substantial damage > failure of the flight crew to maintain main rotor RPM during a landing touchdown, which resulted in the main rotor blades contacting the tailboom. - [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 FTW97LA326](https://openairdocs.org/ntsb/FTW97LA326.md): Bell 206B · Oak Grove, LA · Accident · No injuries · Limited investigation · Final report · Aug 23, 1997 · N7929J · Substantial damage > The disconnect of the #5 tail rotor drive segment due to the debonding of the joint between the shaft tube and the flange fitting. Factors were the improper bead blasting of the tail rotor drive segment by an unknown maintenance personnel, and the lack of… - [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 SEA97LA029](https://openairdocs.org/ntsb/SEA97LA029.md): Bell 206B3 · Ballston, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 19, 1996 · N921RB · Substantial damage > a loss of control for undetermined reasons. - [NTSB LAX97LA039](https://openairdocs.org/ntsb/LAX97LA039.md): McDonnell Douglas 369D · Hana, HI · Accident · No injuries · Limited investigation · Final report · Nov 13, 1996 · N8625F · Substantial damage > subsequent failure of the spur adapter gearshaft (SAG), after 'retaining ring to compressor impeller machining' occurred and allowed the SAG to shift aft. The mechanism which induced the ring to impeller machining was not determined. Mountainous terrain in… - [NTSB ANC96LA154](https://openairdocs.org/ntsb/ANC96LA154.md): Bell 206B · Cantwell, AK · Accident · Serious injuries · Limited investigation · Final report · Sep 13, 1996 · N7982J · Destroyed > the pilot's continued VFR flight into instrument meteorological conditions (IMC). The terrain conditions, low ceiling, fog, and whiteout conditions were related factors. - [NTSB MIA96LA180](https://openairdocs.org/ntsb/MIA96LA180.md): Bell 206B · Pigeon Forge, TN · Accident · Serious injuries · Limited investigation · Final report · Jul 11, 1996 · N999TV · Substantial damage > fatigue failure of the engine PC line, induced by damage from improper installation, which resulted in a loss of engine power and an autorotative landing to unsuitable terrain. - [NTSB SEA96LA070](https://openairdocs.org/ntsb/SEA96LA070.md): Bell 206B · La Grande, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 18, 1996 · N57362 · Substantial damage > the pilot's failure to maintain clearance with trees after pulling up from an aerial application spray run. - [NTSB LAX95LA310](https://openairdocs.org/ntsb/LAX95LA310.md): Bell 206BIII · Carmel Valley, CA · Accident · No injuries · Limited investigation · Final report · Aug 28, 1995 · N206MT · Substantial damage > the pilot's failure to maintain an adequate clearance from obstructions while hovering. - [NTSB SEA95LA023](https://openairdocs.org/ntsb/SEA95LA023.md): Fairchild Hiller FH-1100 · Yamhill, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 19, 1994 · N4258V · Substantial damage > Failure of the pilot to maintain adequate altitude/clearance, while maneuvering to a hover, which allowed the external load cable/hook to become snagged and to rebound into the path of the main rotor blades. - [NTSB FTW95LA032](https://openairdocs.org/ntsb/FTW95LA032.md): Bell 206L-3 · Ruston, LA · Accident · No injuries · Limited investigation · Final report · Oct 27, 1994 · N206SF · Substantial damage > The pilot's improper handling of the helicopter after an apparent loss of power during a practice autorotation. - [NTSB LAX94LA387](https://openairdocs.org/ntsb/LAX94LA387.md): Hughes 369D · Pacific Ocean (Pacific Ocean) · Accident · Serious injuries · Limited investigation · Final report · Sep 24, 1994 · N58400 · Destroyed > failure of the helicopter's main rotor pitch change link (control rod). The helicopter was not recovered and the Safety Board was unable to determine the pitch change link's failure mode. - [NTSB LAX94FA372](https://openairdocs.org/ntsb/LAX94FA372.md): Hughes 369D · Genoa, NV · Accident · Minor injuries · Field investigation · Final report · Sep 22, 1994 · N58352 · Substantial damage > The pilot/operator's operation of the helicopter with a disconnected throttle on the right collective; the FAA inspector's inadequate preflight/pretakeoff checks of the flight control/throttle systems; and the pilot/operator's failure to adequately inform the… - [NTSB ANC94LA064](https://openairdocs.org/ntsb/ANC94LA064.md): Hiller FH1100 · Tyonek, AK · Accident · No injuries · Limited investigation · Final report · Jun 4, 1994 · N746FH · Substantial damage > The pilot's selection of unsuitable terrain for landing which resulted in a dynamic rollover. A factor was the soft landing area selected. - [NTSB FTW94LA093](https://openairdocs.org/ntsb/FTW94LA093.md): Bell 206BIII · Lake Charles, LA · Accident · Minor injuries · Limited investigation · Final report · Mar 10, 1994 · N57340 · Substantial damage > The failure of the pilot to adequately perform a preflight. A factor was the soft terrain. - [NTSB ATL94LA014](https://openairdocs.org/ntsb/ATL94LA014.md): Bell 47G-3B-1 Soloy · Atmore, AL · Accident · No injuries · Limited investigation · Final report · Nov 12, 1993 · N3078G · Substantial damage > The pilot's inadequate pre-flight inspection. Factors were the lack of a filter on the refueling pump which would preclude water passage, and the high trees. - [NTSB FTW93LA228](https://openairdocs.org/ntsb/FTW93LA228.md): Bell 206B · Pearland, TX · Accident · No injuries · Limited investigation · Final report · Aug 4, 1993 · N16814 · Substantial damage > Pilot's failure to maintain proper rotor RPM, the delayed flare, and improper touchdown. Factors were total failure of the power turbine due to oil starvation to the #8 bearing assembly. - [NTSB ANC93FA064](https://openairdocs.org/ntsb/ANC93FA064.md): Fairchild FH-1100 · Malina Bay, AK · Accident · Serious injuries · Field investigation · Final report · May 17, 1993 · N5060F · Substantial damage > The installation of a bogus transmission to engine driveshaft. The failure of the company maintenance personnel to comply with the service bulletins and letters was a factor. - [NTSB DEN93LA060](https://openairdocs.org/ntsb/DEN93LA060.md): Bell 206L-1 · Mead, CO · Accident · Minor injuries · Limited investigation · Final report · May 16, 1993 · N38Q · Substantial damage > A failure by the pilot in command to compensate for wind conditions and maintain control of the helicopter. A factor was: unfavorable wind conditions. - [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 CHI92LA017](https://openairdocs.org/ntsb/CHI92LA017.md): Mcdonnell Douglas MD369D · Beech Grove, IN · Accident · No injuries · Limited investigation · Final report · Oct 23, 1991 · N88SE · Substantial damage > Improper installation of the flight control linkage during maintenance. Complacency and inadequate inspection of the helicopter by maintenance personnel and the pilot are factors in the accident. - [NTSB FTW91LA023](https://openairdocs.org/ntsb/FTW91LA023.md): Bell 206L-1 · W.Cameron 266 · Accident · No injuries · Limited investigation · Final report · Dec 9, 1990 · N5753B · Destroyed > Failure of the helicopter's aft landing gear crosstube assembly due to fatigue. - [NTSB SEA91LA023](https://openairdocs.org/ntsb/SEA91LA023.md): Hughes 369D · Mulina, OR · Accident · No injuries · Limited investigation · Final report · Nov 26, 1990 · N1106Z · Substantial damage > In-flight collision with a rebounding long-line, which caused main-rotor RPM decay and tail-boom separation, compromising the pilot's ability to successfully accomplish an attempted autorotation. - [NTSB ANC91FA001](https://openairdocs.org/ntsb/ANC91FA001.md): Hughes 500D · Kennsington, AK · Accident · Serious injuries · Field investigation · Final report · Oct 4, 1990 · N1107G · Substantial damage > The loss of control during takeoff due to dynamic rollover. Contributing to the accident was the pilot-in-command's selection of an uneven landing area. - [NTSB LAX90FA268](https://openairdocs.org/ntsb/LAX90FA268.md): Bell 206B · Quincy, CA · Accident · No injuries · Field investigation · Final report · Jul 25, 1990 · N2292W · Substantial damage > An unidentified contaminate lodged in the fuel governor. - [NTSB LAX90FA230](https://openairdocs.org/ntsb/LAX90FA230.md): Hughes 369D · Hanapepe, HI · Accident · No injuries · Field investigation · Final report · Jun 23, 1990 · N8605F · 2 aircraft · Substantial damage > Failure of pilot of the photographing helicopter to maintain clearance and avoid collision. - [NTSB FTW90LA096](https://openairdocs.org/ntsb/FTW90LA096.md): Bell 206L-1 · E. Island Blk15 · Accident · Serious injuries · Limited investigation · Final report · Apr 17, 1990 · N1071A · No damage > The loss of continuity in the compressor section of the engine due to a fatique failure of the spur adapter gear shaft. - [NTSB FTW90LA083](https://openairdocs.org/ntsb/FTW90LA083.md): Bell 206B · Pearland, TX · Accident · Serious injuries · Limited investigation · Final report · Mar 19, 1990 · N5016F · Substantial damage > Dynamic rollover resultant from improper takeoff techniques used by the rated pilot, and inadequate supervision by the company check pilot. - [NTSB SEA90TL#01](https://openairdocs.org/ntsb/SEA90TL%2301.md): Bell 206 · Cougar, WA · Accident · No injuries · Class 3 · Final report · Mar 12, 1990 · N678KG · Substantial damage - [NTSB NYC90LA072](https://openairdocs.org/ntsb/NYC90LA072.md): Bell 206B · Norwood, MA · Accident · Minor injuries · Limited investigation · Final report · Feb 22, 1990 · N41AA · Substantial damage > Improper planning/decision by the pilot. The turbulence was a related factor. - [NTSB CHI90TL#03](https://openairdocs.org/ntsb/CHI90TL%2303.md): Bell 206B · Fort Thompson, SD · Accident · Serious injuries · Class 3 · Final report · Feb 12, 1990 · N620 · Destroyed - [NTSB SEA89LA170](https://openairdocs.org/ntsb/SEA89LA170.md): Hughes 369D · Petersburg, AK · Accident · No injuries · Limited investigation · Final report · Sep 9, 1989 · N1088N · Substantial damage > The pilot failed to obtain clearance over trees. Contributing to the accident was: the aircraft being above its maximum certificated gross weight limitation and the trees. - [NTSB MKC89LA188](https://openairdocs.org/ntsb/MKC89LA188.md): Bell 206B · Park Rapids, MN · Accident · No injuries · Limited investigation · Final report · Aug 26, 1989 · N2168S · Substantial damage > The pilot misjudged the clearance between the helicopter and the power line. The power line (transmission wire) was considered to be a contributing factor. - [NTSB NYC89LA188](https://openairdocs.org/ntsb/NYC89LA188.md): Bell 206B · Nanuet, NY · Accident · No injuries · Limited investigation · Final report · Aug 10, 1989 · N16929 · Substantial damage > Inadequate preflight planning/preparation by the pilot, which resulted in fuel exhaustion due to an inadequate supply of fuel. - [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 NYC89LA126](https://openairdocs.org/ntsb/NYC89LA126.md): Bell 206A · Bedminster, NJ · Accident · Minor injuries · Limited investigation · Final report · Apr 27, 1989 · N273E · Substantial damage > Off airport landing in unsuitable terrain due to an undetermined power loss. - [NTSB LAX88LA325](https://openairdocs.org/ntsb/LAX88LA325.md): Bell 206L · Lihue, HI · Accident · No injuries · Limited investigation · Final report · Sep 17, 1988 · N278KA · Substantial damage > During a local sightseeing flight, the pilot reported that while on final approach for landing, the audio and light for low RPM sounded and illuminated. The helicopter was autorotated. It initially bounced when it touched down, then landed hard. The engine… - [NTSB LAX88LA304](https://openairdocs.org/ntsb/LAX88LA304.md): Bell 206L-1 · Barrett Junct., CA · Accident · Serious injuries · Limited investigation · Final report · Aug 31, 1988 · N74WH · Substantial damage > While descending into a canyon, the aircraft struck powerlines, went into an uncontrolled descent and collided with the terrain. The pilot stated that he could not see the powerlines and that his visibility was restricted by the sun. All four passengers… - [NTSB MIA88FA257](https://openairdocs.org/ntsb/MIA88FA257.md): Hughes 500 · Riviera Beach, FL · Accident · Serious injuries · Field investigation · Final report · Aug 19, 1988 · N3766Z · Substantial damage > The traffic watch helicopter was cruising northbound along the interstate at 450 ft AGL & 85 KTS airspeed. A grinding noise was heard & the tail rotor separated from the acft. The acft began an uncommanded right turn which was arrested in about 1/4 turn. The… - [NTSB ANC88LA086](https://openairdocs.org/ntsb/ANC88LA086.md): Hughes 369D · Kitoi Bay, AK · Accident · No injuries · Limited investigation · Final report · Jul 9, 1988 · N1089D · Substantial damage > The helicopter landed with the left skid against a survey stake which protruded from the ground about 6 inches. Upon liftoff the skid did not clear the metal stake before the helicopter started moving laterally to the left. The left skid remained against the… - [NTSB FTW88LA082](https://openairdocs.org/ntsb/FTW88LA082.md): Sikorsky S-76A · Offshore Oil · Accident · Serious injuries · Limited investigation · Final report · Mar 24, 1988 · N1547N · No damage > After landing on the platform, the copilot moved the power levers to flight idle and set the main rotor blade tip path plane to the height normally used. When an enplanning passenger came up the stairs onto the platform, he was struck on the head by the main… - [NTSB SEA88FA050](https://openairdocs.org/ntsb/SEA88FA050.md): Bell 206A · Roseburg, OR · Accident · Serious injuries · Field investigation · Final report · Feb 18, 1988 · N7981J · Substantial damage > While hovering at 200' AGL, the eng lost power & the plt entered an autorotation. He maneuvered to avoid trees & landed amid tree stumps in a logging clear cut area. An investigation revealed the 1st stage turbine wheel had failed. The wheel exited the eng &… - [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 FTW87LA194](https://openairdocs.org/ntsb/FTW87LA194.md): Bell 206L-1 · Eugene Island · Accident · Minor injuries · Limited investigation · Final report · Aug 10, 1987 · N5000Y · Destroyed > The acft experienced a main rotor blade strike during takeoff from an offshore platform. The rotor blade struck the underside of a cable raceway on a drilling rig that was situated adjacent to the platform helideck. The raceway was 9 feet laterally and 22… - [NTSB BFO87LA047](https://openairdocs.org/ntsb/BFO87LA047.md): Hiller FH-1100 · Capron, VA · Accident · Minor injuries · Limited investigation · Final report · Jul 15, 1987 · N590FH · Substantial damage > The plt made a 60 mph power descent landing apch. When the helicopter descended to a height of about 10 ft AGL, the plt raised collective and applied left rudder pressure. The helicopter abruptly turned right. According to the plt, the helicopter did not… Next page: https://openairdocs.org/ntsb.md?engine=03002&page=4 ## 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.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&page=3 --- 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.