NTSB investigations: Allison 250 SER 250HP
267 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, newest first
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.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."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 ANC98TA162Accident · Serious injuriesFinal reportHughes 369D · Homer, AKThe 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 SEA98LA160Accident · Minor injuriesLimited investigationFinal reportMcDonnell Douglas 369D · Oso, WAThe 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 FTW98LA260Accident · No injuriesLimited investigationFinal reportBell 206B · Corpus Christi, TXThe 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 MIA98LA148Accident · No injuriesLimited investigationFinal reportBell 206L-1 · Orlando, FLfailure of the flight crew to maintain main rotor RPM during a landing touchdown, which resulted in the main rotor blades contacting the tailboom.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 FTW97LA326Accident · No injuriesLimited investigationFinal reportBell 206B · Oak Grove, LAThe 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 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 SEA97LA029Accident · Serious injuriesLimited investigationFinal reportBell 206B3 · Ballston, ORa loss of control for undetermined reasons.NTSB LAX97LA039Accident · No injuriesLimited investigationFinal reportMcDonnell Douglas 369D · Hana, HIsubsequent 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 ANC96LA154Accident · Serious injuriesLimited investigationFinal reportBell 206B · Cantwell, AKthe pilot's continued VFR flight into instrument meteorological conditions (IMC). The terrain conditions, low ceiling, fog, and whiteout conditions were related factors.NTSB MIA96LA180Accident · Serious injuriesLimited investigationFinal reportBell 206B · Pigeon Forge, TNfatigue 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 SEA96LA070Accident · Minor injuriesLimited investigationFinal reportBell 206B · La Grande, ORthe pilot's failure to maintain clearance with trees after pulling up from an aerial application spray run.NTSB LAX95LA310Accident · No injuriesLimited investigationFinal reportBell 206BIII · Carmel Valley, CAthe pilot's failure to maintain an adequate clearance from obstructions while hovering.NTSB SEA95LA023Accident · Serious injuriesLimited investigationFinal reportFairchild Hiller FH-1100 · Yamhill, ORFailure 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 FTW95LA032Accident · No injuriesLimited investigationFinal reportBell 206L-3 · Ruston, LAThe pilot's improper handling of the helicopter after an apparent loss of power during a practice autorotation.NTSB LAX94LA387Accident · Serious injuriesLimited investigationFinal reportHughes 369D · Pacific Ocean (Pacific Ocean)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 LAX94FA372Accident · Minor injuriesField investigationFinal reportHughes 369D · Genoa, NVThe 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 ANC94LA064Accident · No injuriesLimited investigationFinal reportHiller FH1100 · Tyonek, AKThe pilot's selection of unsuitable terrain for landing which resulted in a dynamic rollover. A factor was the soft landing area selected.NTSB FTW94LA093Accident · Minor injuriesLimited investigationFinal reportBell 206BIII · Lake Charles, LAThe failure of the pilot to adequately perform a preflight. A factor was the soft terrain.NTSB ATL94LA014Accident · No injuriesLimited investigationFinal reportBell 47G-3B-1 Soloy · Atmore, ALThe 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 FTW93LA228Accident · No injuriesLimited investigationFinal reportBell 206B · Pearland, TXPilot'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 ANC93FA064Accident · Serious injuriesField investigationFinal reportFairchild FH-1100 · Malina Bay, AKThe 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 DEN93LA060Accident · Minor injuriesLimited investigationFinal reportBell 206L-1 · Mead, COA failure by the pilot in command to compensate for wind conditions and maintain control of the helicopter. A factor was: unfavorable wind conditions.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 CHI92LA017Accident · No injuriesLimited investigationFinal reportMcdonnell Douglas MD369D · Beech Grove, INImproper 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 FTW91LA023Accident · No injuriesLimited investigationFinal reportBell 206L-1 · W.Cameron 266Failure of the helicopter's aft landing gear crosstube assembly due to fatigue.NTSB SEA91LA023Accident · No injuriesLimited investigationFinal reportHughes 369D · Mulina, ORIn-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 ANC91FA001Accident · Serious injuriesField investigationFinal reportHughes 500D · Kennsington, AKThe 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 LAX90FA268Accident · No injuriesField investigationFinal reportBell 206B · Quincy, CAAn unidentified contaminate lodged in the fuel governor.NTSB LAX90FA230Accident · No injuriesField investigationFinal reportHughes 369D · Hanapepe, HIFailure of pilot of the photographing helicopter to maintain clearance and avoid collision.NTSB FTW90LA096Accident · Serious injuriesLimited investigationFinal reportBell 206L-1 · E. Island Blk15The loss of continuity in the compressor section of the engine due to a fatique failure of the spur adapter gear shaft.NTSB FTW90LA083Accident · Serious injuriesLimited investigationFinal reportBell 206B · Pearland, TXDynamic rollover resultant from improper takeoff techniques used by the rated pilot, and inadequate supervision by the company check pilot.NTSB SEA90TL#01Accident · No injuriesClass 3Final reportBell 206 · Cougar, WANTSB NYC90LA072Accident · Minor injuriesLimited investigationFinal reportBell 206B · Norwood, MAImproper planning/decision by the pilot. The turbulence was a related factor.NTSB CHI90TL#03Accident · Serious injuriesClass 3Final reportBell 206B · Fort Thompson, SDNTSB SEA89LA170Accident · No injuriesLimited investigationFinal reportHughes 369D · Petersburg, AKThe 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 MKC89LA188Accident · No injuriesLimited investigationFinal reportBell 206B · Park Rapids, MNThe pilot misjudged the clearance between the helicopter and the power line. The power line (transmission wire) was considered to be a contributing factor.NTSB NYC89LA188Accident · No injuriesLimited investigationFinal reportBell 206B · Nanuet, NYInadequate preflight planning/preparation by the pilot, which resulted in fuel exhaustion due to an inadequate supply of fuel.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 NYC89LA126Accident · Minor injuriesLimited investigationFinal reportBell 206A · Bedminster, NJOff airport landing in unsuitable terrain due to an undetermined power loss.NTSB LAX88LA325Accident · No injuriesLimited investigationFinal reportBell 206L · Lihue, HIDuring 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 LAX88LA304Accident · Serious injuriesLimited investigationFinal reportBell 206L-1 · Barrett Junct., CAWhile 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 MIA88FA257Accident · Serious injuriesField investigationFinal reportHughes 500 · Riviera Beach, FLThe 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 ANC88LA086Accident · No injuriesLimited investigationFinal reportHughes 369D · Kitoi Bay, AKThe 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 FTW88LA082Accident · Serious injuriesLimited investigationFinal reportSikorsky S-76A · Offshore OilAfter 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 SEA88FA050Accident · Serious injuriesField investigationFinal reportBell 206A · Roseburg, ORWhile 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 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 FTW87LA194Accident · Minor injuriesLimited investigationFinal reportBell 206L-1 · Eugene IslandThe 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 BFO87LA047Accident · Minor injuriesLimited investigationFinal reportHiller FH-1100 · Capron, VAThe 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…