NTSB investigations: Allison 250 series
89 cases on aircraft whose registry engine model is Allison 250 series. 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 ('03014', '03019'))
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 ('03014', '03019'))
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 SEA90LA025Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Raymond, WALoss of engine power due to fatigue failure of the impeller. The helicopter was substantially damaged as a result of a roll-over on uneven terrain.NTSB SEA86FA039Accident · 1 fatalField investigationFinal reportHiller-Soloy UH-12E · Horton, ORThe fork connecting the rotorcraft's blue blade to the main rotor hub separated after a long term fatigue crack had spread through more than 60% of the fork circumference. The operator failed to carry out the appropriate inspection of the fork unit as…NTSB LAX85LA305Accident · No injuriesLimited investigationFinal reportHiller UH-12E · Gonzales, CAWhile cruising during an ag flight the acft's eng began losing pwr. At the time the acft was about 50 ft AGL & was travelling at 50 mph. The plt made a forced ldg onto a nearby plowed fld. Upon touchdown the rt skid dug into a furrow & the acft rolled over.…NTSB CHI85LA254Accident · No injuriesLimited investigationFinal reportBell 47G-4 · Lakeville, MNThe acft was being landed on a trailer for transportation. Upon touchdown the right skid hooked on the landing guides and the helicopter rolled to the right side. The main rotor blades struck the ground, the left fuel tank ruptured and an explosion and fire…NTSB LAX85LA002Accident · Minor injuriesLimited investigationFinal reportHiller UH-12E · Firebaugh, CAThe acft collided with terrain while on an aerial application flt. The plt stated he, 'heard a loud bang' while spraying. Then the 'nose of the helicopter dove radically down', and he crashed into the field. Examination of the site revealed that one of the…NTSB LAX84LA428Accident · Serious injuriesLimited investigationFinal reportHiller UH-12ET · Delano, CAThe Hiller UH-12 helicopter (with a soloy conversion) was on a spray run when the eng began losing power. The plt headed for an 'open spot in the trees', but all power was lost the acft collided with almond trees. Only 15 to 18 ozs of fuel were remaining in…NTSB FTW84LA282Accident · Minor injuriesLimited investigationFinal reportBell 47G-5A · Houma, LAThe helicopter autorotated into trees and marsh land after a partial loss of power. The acft was on a pipeline patrol atlow alt at the time of the power loss. Examination of the engine after the accident revealed that the fuel control governor spring, p/n…NTSB MIA84LA179Accident · No injuriesLimited investigationFinal reportBell 47G-5 · Jupiter, FLThe acft crashed landed after a partial loss of power. During an exam of the eng, the compressor bleed control valve was found stuck open causing an improper fuel/air mixture.NTSB NYC84FGM04Accident · No injuriesFinal reportHiller UH-12E · Sigel, PAThe plt was on an aerial application flt over a wooded area. According to him, he had a tail rotor problem & it was necessary to extend his glide to reach an open area. Subsequently, the helicopter landed hard & the main rotor blades struck & severed the tail…NTSB ANC83LA172Accident · No injuriesLimited investigationFinal reportHiller-Soloy UH12E · Cape Yakataga, AKThe helicopter rolled over during a forced landing on a beach after the engine quit. Discussions with the plt owner of the company verified that the acft had run out of fuel. The owner had warned his pilots to visually check fuel on the helicopters due to…NTSB SEA82DA164Accident · No injuriesFinal reportHiller-Soloy UH-12E · Spirit Lake, WAPilot performed autorotation from 2000 feet to check RPM. At 200-300 feet when collective was added power loss occurred. Aircraft landed hard and severed tail boom. Logging support operations.NTSB SEA82FYM11Accident · Minor injuriesFinal reportHiller UH-12E · Mount Angle, ORThe aircraft was being used on an external load operation. On his fourth load, the pilot was to transport a 1190 lb electric pump and fan from the back of a pickup truck. While preparing to lift the load, the pilot was not satisfied with its position. He…NTSB SEA82DYM07Accident · No injuriesClosedHiller Acft UH-12E · Nashville, ORNTSB DEN82FTM02Accident · No injuriesClosedSoloy 47 · Fruitland, UTNTSB LAX81DVD28Accident · No injuriesClosedHiller Acft UH-12E · Orleans, CANTSB SEA81DYE08Accident · No injuriesClosedHiller Acft UH-12E · Forks, WANTSB LAX81DXQ01Accident · No injuriesClosedHiller Acft UH-12E · Quincy, CANTSB SEA80DYM55Accident · No injuriesClosedHiller Acft UH-12E · Tillamook, ORNTSB SEA80DYE32Accident · Serious injuriesClosedHiller Acft UH-12E · Forks, WANTSB LAX80DVG30Accident · Minor injuriesClosedHiller UH-12J · Frks Of Salmn, CANTSB SEA79FYM32Accident · No injuriesClosedHiller Acft UH-12E · Independence, ORNTSB SEA79DYM23Accident · No injuriesClosedHiller Acft UH-12E · Friend, ORNTSB ANC78FA057Accident · Minor injuriesClosedHiller UH12E3 · Livengood, AKNTSB SEA78FYE16Accident · No injuriesClosedHiller Acft UH-12E · Forks, WANTSB SEA78FYK06Accident · 1 fatalClosedHiller UH-12E · Reedsport, ORNTSB SEA78FTA08Accident · Minor injuriesClosedBell 47G3B1 · Billings, MTNTSB SEA76DYG67Accident · No injuriesClosedHiller Acft UH-12E · Clark Fork, IDNTSB SEA76DYE65Accident · Serious injuriesClosedHiller Acft UH-12E · Humptulips, WANTSB SEA76DYG44Accident · No injuriesClosedBell 47G-3B · Palouse, WANTSB ANC76DAG17Accident · No injuriesClosedHiller Acft UH-12E · Kenai, AKNTSB SEA76FTI02Accident · No injuriesClosedBell 47G3B1 · Elliston, MTNTSB ANC75DAD06Accident · No injuriesClosedHiller Acft UH-12E · Ketchikan, AKNTSB DEN75AD022Accident · Minor injuriesClosedBell 47G3B1 · Vernal, UTNTSB ANC75AA021Accident · Minor injuriesClosedHiller Acft UH-12E · Ketchikan, AKNTSB SEA74DYG50Accident · Minor injuriesClosedBell 47G3B2 · Clarkston, WANTSB MKC74FCA12Accident · No injuriesClosedBell 47G-5 · Creve Coeur, MONTSB DIA69F0110Accident · Minor injuriesClosedBell 47G-5 · Roanoke, VANTSB NYC67A0018Accident · No injuriesClosedBell 47G-4 · Savannah, NYNTSB ANC67A0006Accident · No injuriesClosedHiller UH12E4 · Fairbanks, AK