# NTSB investigations: Lycoming VO-435 series: In flight collision with terrain/water 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 CHI03LA204](https://openairdocs.org/ntsb/CHI03LA204.md): Continental Copters MK6B · Ft. Yates, ND · Accident · No injuries · Limited investigation · Final report · Jul 9, 2003 · N9080T · Substantial damage > The inadvertent settling with power and unsuccessful remedial action by the pilot. A factor to the accident was the potato crop. - [NTSB LAX94LA386](https://openairdocs.org/ntsb/LAX94LA386.md): Bell 47G-5 · Pacific Ocean (Pacific Ocean) · Accident · 2 fatal · Limited investigation · Final report · Sep 17, 1994 · N2280W · Substantial damage > an in-flight collision with the water for undetermined reasons. - [NTSB SEA94LA064](https://openairdocs.org/ntsb/SEA94LA064.md): Hiller-Soloy H-23D · Seaside, OR · Accident · Minor injuries · Limited investigation · Final report · Feb 23, 1994 · N62413 · Destroyed > The pilot's improper use of flight controls resulting in settling with power. - [NTSB LAX92LA378](https://openairdocs.org/ntsb/LAX92LA378.md): Texas Helicopter OH-13E/M74 · Chandler, AZ · Accident · No injuries · Limited investigation · Final report · Sep 6, 1992 · N38099 · Substantial damage > The pilot's misjudging the performance and weight and balance data of the helicopter prior to departure. Contributing to the accident was a failure of the pilot to jettison the chemical load. - [NTSB FTW91LA125](https://openairdocs.org/ntsb/FTW91LA125.md): Bell 47G-2 · Slidell, LA · Accident · No injuries · Limited investigation · Final report · Jul 22, 1991 · N312SH · Substantial damage > The pilot performing a touchdown autorotation to unsuitable terrain. Factors were the soft terrain and the inadequate supervision by the FAA inspector. - [NTSB CHI91LA205](https://openairdocs.org/ntsb/CHI91LA205.md): Hiller UH-12D · Savoy, IL · Accident · No injuries · Limited investigation · Final report · Jul 2, 1991 · N94515 · Substantial damage > The pilot's failure to maintain tail rotor clearance from the ground. A related factor is the pilot's lack of total experience in helicopters. - [NTSB MKC90LA138](https://openairdocs.org/ntsb/MKC90LA138.md): Hiller 12-E · Watson, MN · Accident · No injuries · Limited investigation · Final report · Jun 26, 1990 · N62397 · Substantial damage > Pilot misjudged his flare and collided with the terrain. - [NTSB ATL89FA193](https://openairdocs.org/ntsb/ATL89FA193.md): Texas Helicopter OH-13/M74 · Norman Park, GA · Accident · 1 fatal · Field investigation · Final report · Aug 2, 1989 · N51850 · Destroyed > Improper planning/decision by the pilot, which resulted in his physical impairment from exposure to lannate, and his failure to maintain altitude/clearance above the ground. A factor related to the accident was: failure of the pilot to use a respirator while… - [NTSB ATL87LA222](https://openairdocs.org/ntsb/ATL87LA222.md): Bell 47G-2 · Huntsville, AL · Accident · Minor injuries · Limited investigation · Final report · Jul 23, 1987 · N972B · Substantial damage > The helicopter impacted the water during a low-altitude turn over a river. The plt made a low pass to the south over an island at about 30 ft AGL, to show the island to the policewoman/traffic observer onboard. As he was making a climbing right turn at about… - [NTSB SEA86LA177](https://openairdocs.org/ntsb/SEA86LA177.md): Bell 47G3B2 · Nahcotta, WA · Accident · Minor injuries · Limited investigation · Final report · Jul 21, 1986 · N7092J · Destroyed > While spraying oyster beds the pilot inadvertently flew the helicopter into the ground. - [NTSB CHI85FA301](https://openairdocs.org/ntsb/CHI85FA301.md): Bell 47G2A1 · Brook, IN · Accident · 1 fatal · Field investigation · Final report · Jul 20, 1985 · N1345A · Destroyed > The helicopter contacted the terrain in a flat attitude and rolled over during an autorotative landing. A witness stated an autorotation was entered at 800 ft AGL during which the plt made a 360 deg descending turn. An application of pwr was heard at an alt… - [NTSB SEA85LA126](https://openairdocs.org/ntsb/SEA85LA126.md): Hiller UH-12E · Athena, OR · Accident · No injuries · Limited investigation · Final report · May 31, 1985 · N37HS · Destroyed > The acft settled back to the ground shortly after takeoff before achieving translatioanal lift. The plt was attempting to test a new spray unit that had been installed. He had put 80 gallons of water in the spray tanks. - [NTSB ATL84LA295](https://openairdocs.org/ntsb/ATL84LA295.md): Bell 47G-5 · Bluefield, WV · Accident · Minor injuries · Limited investigation · Final report · Sep 24, 1984 · N1398X · Substantial damage > The pilot stated that he hovered the helicopter, made a right pedal turn and initiated a hover taxi across a rocky ravine adjacent to the pad. When over the ravine the helicopter settled onto to boulders beneath it. The pilot also stated that he thought he… - [NTSB MIA83LA196](https://openairdocs.org/ntsb/MIA83LA196.md): Bell 47G-2 · Miami, FL · Accident · No injuries · Limited investigation · Final report · Aug 5, 1983 · N471KC · Substantial damage > The student was a rated single eng, multiengine, land plt, but did not have a helicopter rating. During a dual instructional flt, he had just completed the final phase of an autorotation & the skids were on the ground, when he abruptly pulled the collective… - [NTSB MKC82DA129](https://openairdocs.org/ntsb/MKC82DA129.md): Texas Helicopter OH-13E · 10 Sw Of Milan, MO · Accident · No injuries · Final report · Jul 20, 1982 · N38117 · Substantial damage > The plt had reduced the spray load from 90 to 50 gals to compensate for the increase in density altitude. The winds were blowing lightly during previous takeoffs but were calm during this takeoff. As the helicopter hovered forward during the takeoff it failed… - [NTSB MKC82DA082](https://openairdocs.org/ntsb/MKC82DA082.md): Bell 47G2 · Thornton, IA · Accident · Minor injuries · Final report · May 14, 1982 · N8426E · Substantial damage > During the downwind turn for the fourth spraying pass the pilot encountered a gust of wind. The pilot stated he applied power, collective and cyclic to level off at spraying altitude but the wind was too strong to prevent the tailboom from striking the ground. - [NTSB SEA82DA050](https://openairdocs.org/ntsb/SEA82DA050.md): Bell 47G-2A · Lyle, WA · Accident · No injuries · Final report · Apr 10, 1982 · N11VH · Substantial damage > During takeoff with a load of fertilizer, insufficient power was available to maintain engine and rotor RPM and sustain flight. The pilot dumped the load, but was unable to avoid ground contact. The tail rotor struck first and separated from the aircraft. The… ## 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 ('41525') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 230)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41525&occurrence=230 --- 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.