# NTSB investigations: Lycoming HIO-360 series, OR 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 WPR15LA261](https://openairdocs.org/ntsb/WPR15LA261.md): Schweizer 269C · Forest Grove, OR · Accident · Minor injuries · Limited investigation · Final report · Sep 18, 2015 · N290R · Substantial damage > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination of the airframe and engine did not reveal any anomalies that would have precluded normal operation. - [NTSB WPR15FA205](https://openairdocs.org/ntsb/WPR15FA205.md): Schweizer 269C · Newberg, OR · Accident · 2 fatal · Field investigation · Final report · Jul 2, 2015 · N2096W · Destroyed > The loss of translation/rotational power between the engine and the transmission due to the severe wear of the forward spline portion of the lower coupling drive shaft. The reason for the severe wear of the forward spline could not be definitively determined… - [NTSB SEA08LA035](https://openairdocs.org/ntsb/SEA08LA035.md): Schweizer 269C · Newberg, OR · Accident · Serious injuries · Limited investigation · Final report · Nov 21, 2007 · N61480 · Substantial damage > The student pilot's inadvertent application of the fuel shut off valve during flight. Contributing to the accident were the locations of the heater and fuel shutoff controls. - [NTSB SEA08FA022](https://openairdocs.org/ntsb/SEA08FA022.md): Hughes 269C · Baker City, OR · Accident · 1 fatal · Field investigation · Final report · Nov 8, 2007 · N381MC · Substantial damage > The pilot’s failure to maintain main rotor rpm while maneuvering. - [NTSB LAX07LA106](https://openairdocs.org/ntsb/LAX07LA106.md): Enstrom F-28F · Monmouth, OR · Accident · No injuries · Limited investigation · Final report · Mar 6, 2007 · N785M · Substantial damage > The failure of the main drive belt tension assembly shaft due to high cycle, low stress fatigue. - [NTSB SEA00FA014](https://openairdocs.org/ntsb/SEA00FA014.md): Enstrom F28C · Pendleton, OR · Accident · 1 fatal · Field investigation · Final report · Nov 2, 1999 · N635H · Destroyed > Failure to maintain clearance from the runway surface while maneuvering at low altitude, and inadequate remedial action after the tail rotor struck the surface. - [NTSB SEA99FA168](https://openairdocs.org/ntsb/SEA99FA168.md): Schweizer 269C · Westport, OR · Accident · 1 fatal · Field investigation · Final report · Aug 8, 1999 · N383T · Destroyed > The pilot's failure to maintain clearance from terrain. Factors include low clouds and visibility and near-night light conditions. - [NTSB SEA99LA048](https://openairdocs.org/ntsb/SEA99LA048.md): Enstrom F-28C · Pendleton, OR · Accident · No injuries · Limited investigation · Final report · Apr 7, 1999 · N51770 · Substantial damage > A loss of power due to water contamination of the fuel. Factors include the inability of the helicopter to perform a successful autorotation immediately after takeoff. - [NTSB SEA98FA055](https://openairdocs.org/ntsb/SEA98FA055.md): Enstrom F28F · Baker, OR · Accident · No injuries · Field investigation · Final report · Mar 30, 1998 · N171HH · Substantial damage > Fatigue failure of the steel tubing pylon structure. Factors include inadequate inspection by maintenance personnel of damage after a previous accident. - [NTSB SEA98LA021](https://openairdocs.org/ntsb/SEA98LA021.md): Enstrom F-28F · John Day, OR · Accident · No injuries · Limited investigation · Final report · Dec 6, 1997 · N171HH · Substantial damage > a loss of engine power for undetermined reasons. - [NTSB SEA94LA153](https://openairdocs.org/ntsb/SEA94LA153.md): Schweizer 269C · Hillsboro, OR · Accident · No injuries · Limited investigation · Final report · Jun 21, 1994 · N7506A · Substantial damage > The improper servicing of the skid shock struts. - [NTSB SEA91LA044](https://openairdocs.org/ntsb/SEA91LA044.md): Schweizer Hughes 269C · Princeton, OR · Accident · No injuries · Limited investigation · Final report · Jan 19, 1991 · N75070 · Substantial damage > The pilot's attempt to hover out of ground effect at a density altitude and gross weight in tailwind weather conditions that exceeded the aircraft performance limits. Factors relating to the accident were the high density altitude and tailwind weather… - [NTSB SEA90LA016](https://openairdocs.org/ntsb/SEA90LA016.md): Hughes 269C · Estacada, OR · Accident · 1 fatal · Limited investigation · Final report · Nov 15, 1989 · N9592F · Destroyed > The pilot misjudged clearance between her external load and the obstruction. Factors related to the accident were: the obstruction, improper maintenance and modification of the external load line/hook by the operator, failure of the pilot to jettison the… - [NTSB SEA89LA052](https://openairdocs.org/ntsb/SEA89LA052.md): Schweizer 269C · Forrest Grove, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 3, 1989 · N7505Y · Substantial damage > The pilot's misjudgment of his altitude and clearance while attempting to sling-load a trailer. - [NTSB SEA86LA026](https://openairdocs.org/ntsb/SEA86LA026.md): Hughes 269C · Brooks, OR · Accident · No injuries · Limited investigation · Final report · Nov 24, 1985 · N58181 · Substantial damage > A total loss of power occurred due to the number 4 cylinder failing. A tail boom strike occurred during a hard landing in a parking lot, severing the tail boom. - [NTSB SEA84LA021](https://openairdocs.org/ntsb/SEA84LA021.md): Enstrom F28F · Hillsboro, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 15, 1983 · N8622U · Substantial damage > The acft did a hard landing during autorotation after the engine ran rough and quit at 250 ft AGL during takeoff. The pilot had leaned the mixture, he said, prior to takeoff and he was not sure if he pushed the mixture to full rich when the engine started to… - [NTSB SEA81FYM07](https://openairdocs.org/ntsb/SEA81FYM07.md): Hughes 269C · Pilot Rock, OR · Accident · No injuries · Closed · Aug 31, 1980 · N9643F · Substantial damage - [NTSB SEA73FYC08](https://openairdocs.org/ntsb/SEA73FYC08.md): Hughes 269A · Portland, OR · Accident · Serious injuries · Closed · Sep 9, 1972 · N8752F · Destroyed - [NTSB SEA67A0010](https://openairdocs.org/ntsb/SEA67A0010.md): Hughes 269B · Eaverton, OR · Accident · Minor injuries · Closed · Aug 7, 1966 · N9427F · 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."eventStateOrRegion" = 'OR' AND c."eventCountry" = 'USA' AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41524')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=41524&state=OR --- 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.