# NTSB investigations, OR: Loss of engine power (partial) 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 WPR27LA008](https://openairdocs.org/ntsb/WPR27LA008.md): Hakala John Charles Lancair IV-P-T · Ontario, OR · Accident · No injuries · Class 3 · Limited · Investigation open · Oct 4, 2026 · N5UC - [NTSB WPR26LA193](https://openairdocs.org/ntsb/WPR26LA193.md): Bellanca 7ACA · Pacific City, OR · Accident · No injuries · Class 4 · Limited · Final report · May 14, 2026 · N9158L · Substantial damage > The pilot’s loss of directional control during a precautionary landing following a partial reduction in engine rpm. - [NTSB WPR26FA068](https://openairdocs.org/ntsb/WPR26FA068.md): Beech K35 · Summer Lake, OR · Accident · 1 fatal · Class 3 · Field · Preliminary report · Dec 23, 2025 · N9540R · Substantial damage > On December 23, 2025, about 0841 Pacific standard time, a Beech K35, N9540R, was substantially damaged when it was involved in an accident near Summer Lake, Oregon. The pilot was fatally injured. The airplane was being operated as a Title 14 Code of Federal… - [NTSB WPR25LA228](https://openairdocs.org/ntsb/WPR25LA228.md): Beech V35 · Astoria, OR · Accident · No injuries · Class 3 · Limited · Preliminary report · Jul 23, 2025 · N3785Q · Substantial damage > On July 22, 2025, about 1706 Pacific daylight time, a Beechcraft Bonanza V35, N3785Q, sustained substantial damage when it was involved in an accident near Astoria, Oregon. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code… - [NTSB WPR25LA054](https://openairdocs.org/ntsb/WPR25LA054.md): Cessna 150L · Glen Avon, OR · Accident · No injuries · Class 3 · Limited · Preliminary report · Dec 4, 2024 · N5330Q · Substantial damage > On December 4, 2024, about 1420 Pacific standard time, a Cessna 150L, N5330Q, sustained substantial damage when it was involved in an accident near Glen Avon, Oregon. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code of… - [NTSB WPR23LA097](https://openairdocs.org/ntsb/WPR23LA097.md): Kaman Aerospace K-1200 · Sweet Home, OR · Accident · No injuries · Class 3 · Limited · Final report · Jan 24, 2023 · N202WM · Substantial damage > Improper installation of the hardware retaining the adjustment screw in the N2 topping governor lever and roller assembly, which resulted in a partial loss of engine power. - [NTSB WPR22LA060](https://openairdocs.org/ntsb/WPR22LA060.md): Cessna P210N · Hillsboro, OR · Accident · No injuries · Class 3 · Limited · Final report · Dec 9, 2021 · N152BT · Substantial damage > The on-ground collision with a tree during an off airport precautionary landing. Contributing was the partial loss of engine power for undetermined reasons. - [NTSB WPR21LA094](https://openairdocs.org/ntsb/WPR21LA094.md): Randy Wayne Maloney M1 · Eagle Point, OR · Accident · Minor injuries · Class 3 · Limited · Final report · Jan 21, 2021 · N322TR · Destroyed > A partial loss of engine power for reasons that could not be determined based on available evidence. - [NTSB WPR21LA008](https://openairdocs.org/ntsb/WPR21LA008.md): Cessna 180 · Princeton, OR · Accident · No injuries · Class 3 · Limited · Final report · Oct 2, 2020 · N8678X · Substantial damage > The pilot’s failure to enrichen the mixture, which resulted in a partial loss of engine power. - [NTSB WPR20LA097](https://openairdocs.org/ntsb/WPR20LA097.md): Cessna 170 · Baker City, OR · Accident · No injuries · Class 3 · Limited · Final report · Feb 27, 2020 · N5478C · Substantial damage > The failure of the No. 2 connecting rod bearing as a result of oil starvation due to a contaminated oil filter screen. - [NTSB WPR20FA016](https://openairdocs.org/ntsb/WPR20FA016.md): Enstrom 280F · Jordan Valley, OR · Accident · 1 fatal · Class 3 · Field · Final report · Oct 25, 2019 · N280F · Substantial damage > A partial loss of engine power due to a worn engine air induction hose, and a subsequent uncontrolled descent into terrain. Contributing to the accident was the failure of maintenance personnel to adequately inspect the hose, and the pilot’s decision to fly… - [NTSB WPR19LA198](https://openairdocs.org/ntsb/WPR19LA198.md): Cessna 172 · Madras, OR · Accident · Minor injuries · Class 3 · Limited · Final report · Jul 22, 2019 · N3761L · Substantial damage > A partial loss of power during final approach for undetermined reasons as postaccident examinations did not reveal any preimpact anomalies with the airplane or engine. - [NTSB WPR19LA207](https://openairdocs.org/ntsb/WPR19LA207.md): Stinson 108 · Klamath Falls, OR · Accident · No injuries · Class 3 · Limited · Final report · Jul 9, 2019 · N6642M · Substantial damage > The mechanic’s failure to identify an engine performance issue, which led to a partial loss of engine power. Contributing to the accident was the pilot’s decision to operate the airplane with a known mechanical deficiency. - [NTSB WPR19FA178](https://openairdocs.org/ntsb/WPR19FA178.md): Maule M7-235B · Sunriver, OR · Accident · 1 fatal · Class 2 · Field · Final report · Jun 22, 2019 · N118G · Substantial damage > A partial loss of engine power due to the separation of baffling in both mufflers. Contributing to the accident was the pilot's failure to retract the landing gear on the float-equipped airplane before performing a forced landing to the river. - [NTSB WPR18LA148](https://openairdocs.org/ntsb/WPR18LA148.md): Cessna 152 · Hillsboro, OR · Accident · No injuries · Class 3 · Limited · Final report · May 26, 2018 · N152GB · Substantial damage > The partial loss of engine power during a go-around due to the loose copper electrode finger inside the left magneto. - [NTSB WPR18LA127](https://openairdocs.org/ntsb/WPR18LA127.md): Yakovlev YAK 52 · Hillsboro, OR · Accident · Serious injuries · Limited investigation · Final report · Apr 26, 2018 · N2YK · Substantial damage > A partial loss of engine power during cruise flight for reasons that could not be determined because postaccident examination did not reveal any mechanical malfunctions or failures that would have precluded normal operation. Contributing to the accident was… - [NTSB WPR18LA111](https://openairdocs.org/ntsb/WPR18LA111.md): Pflugradt Kitfox · Clatskanie, OR · Accident · No injuries · Limited investigation · Final report · Mar 20, 2018 · N925DP · Substantial damage > A partial loss of engine power due to an improperly secured throttle cable set screw. - [NTSB WPR17LA082](https://openairdocs.org/ntsb/WPR17LA082.md): OTT 601XL-B · The Dalles, OR · Accident · Minor injuries · Limited investigation · Final report · Mar 31, 2017 · N610TT · Substantial damage > A partial loss of engine power due to the reverse bending fatigue failure of the propeller hub bolts, which resulted from the bolts not fitting tightly into the propeller hub holes. Also causal was the pilot's decision to use improper bolts for this type of… - [NTSB WPR16LA049](https://openairdocs.org/ntsb/WPR16LA049.md): Kai Engstad RV-8A · Salem, OR · Accident · No injuries · Limited investigation · Final report · Jan 2, 2016 · N958RV · Substantial damage > A total loss of engine power for undetermined reasons, because postaccident examination of the engine and fuel system did not reveal any anomalies that would have precluded normal operation. - [NTSB WPR16LA020](https://openairdocs.org/ntsb/WPR16LA020.md): Bell 206B · Dallas, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 2, 2015 · N22743 · Substantial damage > A loss of engine power for reasons that could not be determined based on the available information. - [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 WPR15LA248](https://openairdocs.org/ntsb/WPR15LA248.md): Sikorsky S 61A · Ironside, OR · Accident · Minor injuries · Limited investigation · Final report · Aug 20, 2015 · N1043T · Substantial damage > A loss of power to the No. 2 engine due to the failure of the accessory gearbox drivetrain. Also causal was the pilot’s inability to release the external longline due to the use of a safety wire across the coupling of the quick-disconnect mechanism, which… - [NTSB WPR15LA156](https://openairdocs.org/ntsb/WPR15LA156.md): Buhl LA 1 · Cottage Grove, OR · Accident · Minor injuries · Limited investigation · Final report · May 3, 2015 · N352Y · Substantial damage > A loss of engine power on downwind for landing due to carburetor icing, which resulted in a forced landing. - [NTSB WPR15LA008](https://openairdocs.org/ntsb/WPR15LA008.md): Piper PA 28-180 · Bend, OR · Accident · Minor injuries · Limited investigation · Final report · Oct 10, 2014 · N32150 · Substantial damage > A partial loss of engine power due to carburetor icing, which resulted from the pilot’s failure to apply carburetor heat after takeoff and during the climb. - [NTSB WPR14LA338](https://openairdocs.org/ntsb/WPR14LA338.md): Nelson RV 3M · North Plains, OR · Accident · No injuries · Class 3 · Limited · Final report · Aug 10, 2014 · N43AZ · Substantial damage > A partial loss of engine power for undetermined reasons which resulted in a landing gear collapse during the precautionary landing to a field. - [NTSB WPR12LA329](https://openairdocs.org/ntsb/WPR12LA329.md): Interplane Skyboy EX · Sandy, OR · Accident · No injuries · Limited investigation · Final report · Jul 28, 2012 · N582YB · Substantial damage > A partial loss of engine power during takeoff due to carburetor icing. Contributing to the accident was the lack of a carburetor heat system installed on the airplane. - [NTSB WPR12LA181](https://openairdocs.org/ntsb/WPR12LA181.md): Cub Crafters CC11-100 · Monmouth, OR · Accident · No injuries · Limited investigation · Final report · Apr 22, 2012 · N499CC · Substantial damage > A partial loss of engine power during takeoff for undetermined reasons. - [NTSB WPR11FA333](https://openairdocs.org/ntsb/WPR11FA333.md): Davidson Zenith Stol CH701 · Glendale, OR · Accident · 2 fatal · Field investigation · Final report · Jul 18, 2011 · N701RD · Substantial damage > A total loss of engine power due to fuel starvation and the pilot’s subsequent failure to maintain airplane control during the forced landing. Contributing to the accident was the pilot’s failure to ensure that the fuel valves were in the correct position for… - [NTSB WPR10LA456](https://openairdocs.org/ntsb/WPR10LA456.md): Savage Savage-Cozy · Aurora, OR · Accident · Serious injuries · Limited investigation · Final report · Sep 12, 2010 · N9699 · Substantial damage > The pilot’s failure to maintain control of the airplane following a loss of engine power in the traffic pattern; the cause of the loss of engine power for reasons that could not be determined because postaccident examination of the airframe and engine did not… - [NTSB WPR10LA424](https://openairdocs.org/ntsb/WPR10LA424.md): Grumman American Avn. AA-5A · Lakeview, OR · Accident · No injuries · Limited investigation · Final report · Aug 22, 2010 · N26118 · Substantial damage > A partial loss of engine power during the initial climb due to a stuck exhaust valve. - [NTSB WPR10CA334](https://openairdocs.org/ntsb/WPR10CA334.md): Luscombe 8E · Tillamook, OR · Accident · Minor injuries · Data collection · Final report · Jul 4, 2010 · N2466K · Substantial damage > The certified flight instructor’s selection of an inappropriate landing surface and the loss of engine power as a result of the improper use carburetor heat. Contributing to the accident was the flight instructor's inadequate supervision. - [NTSB WPR10LA298](https://openairdocs.org/ntsb/WPR10LA298.md): Robinson Helicopter R22 Beta · Hillsboro, OR · Accident · No injuries · Limited investigation · Final report · Jun 19, 2010 · N2548S · Substantial damage > A partial loss of engine power while on approach for undetermined reasons. - [NTSB WPR10LA168](https://openairdocs.org/ntsb/WPR10LA168.md): Cessna 150F · Tillamook, OR · Accident · No injuries · Limited investigation · Final report · Mar 17, 2010 · N7854F · Substantial damage > The partial loss of engine power during climb to cruise due to carburetor icing and the pilot's delay in using carburetor heat. - [NTSB WPR09LA471](https://openairdocs.org/ntsb/WPR09LA471.md): Arrow Falcon Exporters OH-58A+ · Myrtle Creek, OR · Accident · Minor injuries · Limited investigation · Final report · Sep 28, 2009 · N298CP · Substantial damage > A partial loss of engine power during takeoff for undetermined reasons. - [NTSB WPR09LA446](https://openairdocs.org/ntsb/WPR09LA446.md): Grumman American Avn. AA-1B · Creswell, OR · Accident · Minor injuries · Limited investigation · Final report · Sep 12, 2009 · N9682L · Substantial damage > A partial loss of engine power due to the malfunction of the engine's right magneto. - [NTSB WPR09LA219](https://openairdocs.org/ntsb/WPR09LA219.md): Ellumax Leasing Epic LT · Astoria, OR · Accident · No injuries · Limited investigation · Final report · Apr 24, 2009 · N653SB · Substantial damage > The partial loss of engine power during climb to cruise due to the failure of the engine's fuel control unit. Contributing to the accident was the incorrect machining of an internal component of the fuel control unit, and the failure of the assembling… - [NTSB LAX08CA143](https://openairdocs.org/ntsb/LAX08CA143.md): Mason RV-9A · Pacific City, OR · Accident · No injuries · Data collection · Final report · May 17, 2008 · N486EM · Substantial damage > The pilot's inadequate flare and failure to maintain control following a hard landing. Contributing to the accident was a temporary partial loss of power due to carburetor icing conditions. ## 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 s.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' s WHERE s."tier2Number" = '342' AND s.case_mkey IN (SELECT case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' WHERE "isDefiningEvent")) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/342/sequence?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.