# NTSB investigations: Allison 250 series 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 2 of 2 · 90 cases ## Cases, newest first - [NTSB MIA92LA014](https://openairdocs.org/ntsb/MIA92LA014.md): Bell 47G-5 · La Belle, FL · Accident · No injuries · Limited investigation · Final report · Oct 13, 1991 · N1201W · Substantial damage > The pilot in command's improper aft application of cyclic control during an autorotative landing to an open field, resulting in the main rotor blades colliding with the tail boom. Contributing to the accident was the in flight failure of the outer bearing of… - [NTSB SEA90LA025](https://openairdocs.org/ntsb/SEA90LA025.md): Hiller UH-12E · Raymond, WA · Accident · No injuries · Limited investigation · Final report · Nov 29, 1989 · N9762C · Substantial damage > Loss 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 SEA86FA039](https://openairdocs.org/ntsb/SEA86FA039.md): Hiller-Soloy UH-12E · Horton, OR · Accident · 1 fatal · Field investigation · Final report · Jan 16, 1986 · N40290 · Destroyed > The 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 LAX85LA305](https://openairdocs.org/ntsb/LAX85LA305.md): Hiller UH-12E · Gonzales, CA · Accident · No injuries · Limited investigation · Final report · Jul 5, 1985 · N161HA · Substantial damage > While 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 CHI85LA254](https://openairdocs.org/ntsb/CHI85LA254.md): Bell 47G-4 · Lakeville, MN · Accident · No injuries · Limited investigation · Final report · Jun 26, 1985 · N3094G · Substantial damage > The 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 LAX85LA002](https://openairdocs.org/ntsb/LAX85LA002.md): Hiller UH-12E · Firebaugh, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 5, 1984 · N161HA · Substantial damage > The 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 LAX84LA428](https://openairdocs.org/ntsb/LAX84LA428.md): Hiller UH-12ET · Delano, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 4, 1984 · N5359V · Substantial damage > The 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 FTW84LA282](https://openairdocs.org/ntsb/FTW84LA282.md): Bell 47G-5A · Houma, LA · Accident · Minor injuries · Limited investigation · Final report · Jun 21, 1984 · N14807 · Substantial damage > The 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 MIA84LA179](https://openairdocs.org/ntsb/MIA84LA179.md): Bell 47G-5 · Jupiter, FL · Accident · No injuries · Limited investigation · Final report · Jun 7, 1984 · N1201W · Substantial damage > The 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 NYC84FGM04](https://openairdocs.org/ntsb/NYC84FGM04.md): Hiller UH-12E · Sigel, PA · Accident · No injuries · Final report · Jun 2, 1984 · N109EH · Substantial damage > The 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 ANC83LA172](https://openairdocs.org/ntsb/ANC83LA172.md): Hiller-Soloy UH12E · Cape Yakataga, AK · Accident · No injuries · Limited investigation · Final report · Sep 15, 1983 · N3324F · Substantial damage > The 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 SEA82DA164](https://openairdocs.org/ntsb/SEA82DA164.md): Hiller-Soloy UH-12E · Spirit Lake, WA · Accident · No injuries · Final report · Sep 15, 1982 · N513HA · Substantial damage > Pilot 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 SEA82FYM11](https://openairdocs.org/ntsb/SEA82FYM11.md): Hiller UH-12E · Mount Angle, OR · Accident · Minor injuries · Final report · Mar 8, 1982 · N59366 · Destroyed > The 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 SEA82DYM07](https://openairdocs.org/ntsb/SEA82DYM07.md): Hiller Acft UH-12E · Nashville, OR · Accident · No injuries · Closed · Dec 3, 1981 · N161HA · Substantial damage - [NTSB DEN82FTM02](https://openairdocs.org/ntsb/DEN82FTM02.md): Soloy 47 · Fruitland, UT · Accident · No injuries · Closed · Nov 5, 1981 · N1170W · Substantial damage - [NTSB LAX81DVD28](https://openairdocs.org/ntsb/LAX81DVD28.md): Hiller Acft UH-12E · Orleans, CA · Accident · No injuries · Closed · May 30, 1981 · N62409 · Substantial damage - [NTSB SEA81DYE08](https://openairdocs.org/ntsb/SEA81DYE08.md): Hiller Acft UH-12E · Forks, WA · Accident · No injuries · Closed · Nov 19, 1980 · N542HA · Substantial damage - [NTSB LAX81DXQ01](https://openairdocs.org/ntsb/LAX81DXQ01.md): Hiller Acft UH-12E · Quincy, CA · Accident · No injuries · Closed · Oct 1, 1980 · N543HA · Substantial damage - [NTSB SEA80DYM55](https://openairdocs.org/ntsb/SEA80DYM55.md): Hiller Acft UH-12E · Tillamook, OR · Accident · No injuries · Closed · Aug 19, 1980 · N59366 · Substantial damage - [NTSB SEA80DYE32](https://openairdocs.org/ntsb/SEA80DYE32.md): Hiller Acft UH-12E · Forks, WA · Accident · Serious injuries · Closed · May 15, 1980 · N5359V · Destroyed - [NTSB LAX80DVG30](https://openairdocs.org/ntsb/LAX80DVG30.md): Hiller UH-12J · Frks Of Salmn, CA · Accident · Minor injuries · Closed · Apr 24, 1980 · N67042 · Destroyed - [NTSB SEA79FYM32](https://openairdocs.org/ntsb/SEA79FYM32.md): Hiller Acft UH-12E · Independence, OR · Accident · No injuries · Closed · May 11, 1979 · N161HA · Substantial damage - [NTSB SEA79DYM23](https://openairdocs.org/ntsb/SEA79DYM23.md): Hiller Acft UH-12E · Friend, OR · Accident · No injuries · Closed · Mar 24, 1979 · N175HA · Substantial damage - [NTSB ANC78FA057](https://openairdocs.org/ntsb/ANC78FA057.md): Hiller UH12E3 · Livengood, AK · Accident · Minor injuries · Closed · Jul 23, 1978 · N9762C · Substantial damage - [NTSB SEA78FYE16](https://openairdocs.org/ntsb/SEA78FYE16.md): Hiller Acft UH-12E · Forks, WA · Accident · No injuries · Closed · Mar 20, 1978 · N5359V · Substantial damage - [NTSB SEA78FYK06](https://openairdocs.org/ntsb/SEA78FYK06.md): Hiller UH-12E · Reedsport, OR · Accident · 1 fatal · Closed · Jan 20, 1978 · N65149 · Minor damage - [NTSB SEA78FTA08](https://openairdocs.org/ntsb/SEA78FTA08.md): Bell 47G3B1 · Billings, MT · Accident · Minor injuries · Closed · Dec 20, 1977 · N7860S · Destroyed - [NTSB SEA76DYG67](https://openairdocs.org/ntsb/SEA76DYG67.md): Hiller Acft UH-12E · Clark Fork, ID · Accident · No injuries · Closed · Sep 27, 1976 · N62409 · Substantial damage - [NTSB SEA76DYE65](https://openairdocs.org/ntsb/SEA76DYE65.md): Hiller Acft UH-12E · Humptulips, WA · Accident · Serious injuries · Closed · Sep 7, 1976 · N48001 · Substantial damage - [NTSB SEA76DYG44](https://openairdocs.org/ntsb/SEA76DYG44.md): Bell 47G-3B · Palouse, WA · Accident · No injuries · Closed · Apr 21, 1976 · N2240W · Destroyed - [NTSB ANC76DAG17](https://openairdocs.org/ntsb/ANC76DAG17-150436.md): Hiller Acft UH-12E · Kenai, AK · Accident · No injuries · Closed · Jul 21, 1975 · N5359V · Destroyed - [NTSB SEA76FTI02](https://openairdocs.org/ntsb/SEA76FTI02.md): Bell 47G3B1 · Elliston, MT · Accident · No injuries · Closed · Jul 9, 1975 · N1170W · Substantial damage - [NTSB ANC75DAD06](https://openairdocs.org/ntsb/ANC75DAD06.md): Hiller Acft UH-12E · Ketchikan, AK · Accident · No injuries · Closed · May 12, 1975 · N107HA · Substantial damage - [NTSB DEN75AD022](https://openairdocs.org/ntsb/DEN75AD022.md): Bell 47G3B1 · Vernal, UT · Accident · Minor injuries · Closed · Oct 26, 1974 · N1170W · Substantial damage - [NTSB ANC75AA021](https://openairdocs.org/ntsb/ANC75AA021.md): Hiller Acft UH-12E · Ketchikan, AK · Accident · Minor injuries · Closed · Sep 1, 1974 · N112EC · Destroyed - [NTSB SEA74DYG50](https://openairdocs.org/ntsb/SEA74DYG50.md): Bell 47G3B2 · Clarkston, WA · Accident · Minor injuries · Closed · Jun 23, 1974 · N8169J · Destroyed - [NTSB MKC74FCA12](https://openairdocs.org/ntsb/MKC74FCA12-201604.md): Bell 47G-5 · Creve Coeur, MO · Accident · No injuries · Closed · Oct 22, 1973 · N2251W · Substantial damage - [NTSB DIA69F0110](https://openairdocs.org/ntsb/DIA69F0110.md): Bell 47G-5 · Roanoke, VA · Accident · Minor injuries · Closed · Nov 22, 1968 · N1201W · Substantial damage - [NTSB NYC67A0018](https://openairdocs.org/ntsb/NYC67A0018.md): Bell 47G-4 · Savannah, NY · Accident · No injuries · Closed · Jul 26, 1966 · N3094G · Substantial damage - [NTSB ANC67A0006](https://openairdocs.org/ntsb/ANC67A0006.md): Hiller UH12E4 · Fairbanks, AK · Accident · No injuries · Closed · Jul 15, 1966 · N9762C · 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."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 ``` This list as a web page: https://openairdocs.org/ntsb?engine=03014&page=2 --- 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.