# NTSB investigations: Lycoming 0-235 series: 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 CEN26LA330](https://openairdocs.org/ntsb/CEN26LA330.md): Cessna 152 · Bolingbrook, IL · Accident · Minor injuries · Class 3 · Limited · Preliminary report · Sep 29, 2026 · N69009 · Substantial damage > On September 29, 2026, about 1828 central daylight time, a Cessna 152 II airplane, N69009, sustained substantial damage when it was involved in an accident near Bolingbrook, Illinois. The flight instructor and the student pilot sustained minor injuries. The… - [NTSB CEN25LA054](https://openairdocs.org/ntsb/CEN25LA054.md): American AA-1B · Brenham, TX · Accident · No injuries · Class 3 · Limited · Final report · Dec 1, 2024 · N6242L · Substantial damage > A partial loss of engine power due to an obstructed induction system from a mud dauber nest. - [NTSB WPR22LA334](https://openairdocs.org/ntsb/WPR22LA334.md): Buxbaum Mark Edward Long EZ · Medicine Bow, WY · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 5, 2022 · N444MR · Substantial damage > A partial loss of engine power due to the fatigue fracture of the No. 4 exhaust valve head. - [NTSB WPR20LA148](https://openairdocs.org/ntsb/WPR20LA148.md): American AA-1A · Blythe, CA · Accident · Serious injuries · Class 3 · Limited · Final report · May 15, 2020 · N12YT · Substantial damage > The excessive wear of one magneto’s wiring harness, which resulted in a loss of engine power during takeoff. Contributing to the accident was the pilot’s failure to maintain airspeed following the loss of engine power, which resulted in exceedance of the… - [NTSB ERA19LA069](https://openairdocs.org/ntsb/ERA19LA069.md): Cessna 152 · Bell Glade, FL · Accident · No injuries · Limited investigation · Final report · Dec 17, 2018 · N4886B · Substantial damage > A partial loss of engine power due to the No. 1 cylinder's valve keeper becoming dislodged, which ultimately resulted in the intake valve becoming stuck in the valve guide and in the loss of compression to the cylinder. - [NTSB ERA18LA259](https://openairdocs.org/ntsb/ERA18LA259.md): Cessna 152 · St. Augustine, FL · Accident · No injuries · Limited investigation · Final report · Sep 8, 2018 · N6469P · Substantial damage > The partial loss of engine power due to a fractured exhaust valve, which resulted in a forced landing on unsuitable terrain and a subsequent rollover. - [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 WPR17LA175](https://openairdocs.org/ntsb/WPR17LA175.md): Grumman AA1 · Phoenix, AZ · Accident · Serious injuries · Limited investigation · Final report · Aug 1, 2017 · N6216L · Substantial damage > The partial loss of engine power during initial climb due to the No. 3 cylinder exhaust valve becoming stuck open due to deposit buildup in the exhaust valve stem and guide and the pilot’s exceedance of the airplane’s critical angle of attack while attempting… - [NTSB CEN16LA394](https://openairdocs.org/ntsb/CEN16LA394.md): Piper PA 22-108 · Pearland, TX · Accident · Serious injuries · Limited investigation · Final report · Sep 24, 2016 · N4920Z · Substantial damage > A partial loss of engine power during takeoff for reasons that could not be determined based on the available information following a thorough postaccident examination. - [NTSB WPR16FA124](https://openairdocs.org/ntsb/WPR16FA124.md): Grumman American Avn. AA 1B · Hawthorne, CA · Accident · 2 fatal · Field investigation · Final report · Jun 11, 2016 · N4SU · Destroyed > The failure of both pilots to land the airplane on the remaining runway when a sufficient rate of climb could not be attained. Contributing to the accident was a reduction of available engine power due to severe camshaft lobe wear. - [NTSB ERA16LA166](https://openairdocs.org/ntsb/ERA16LA166.md): Champion 7ECA · Tannersville, PA · Accident · No injuries · Limited investigation · Final report · Apr 19, 2016 · N5094X · Substantial damage > A loss of engine power for reasons that could not be determined based on the available evidence. - [NTSB CEN16LA025](https://openairdocs.org/ntsb/CEN16LA025.md): Champion 7ECA · Sheridan, AR · Accident · No injuries · Limited investigation · Final report · Oct 30, 2015 · N9105L · Substantial damage > The partial loss of engine power due to carburetor icing. - [NTSB ERA15LA276](https://openairdocs.org/ntsb/ERA15LA276.md): Grumman American Avn. AA1B · Lititz, PA · Accident · No injuries · Limited investigation · Final report · Jul 19, 2015 · N8969L · Substantial damage > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine found no mechanical malfunctions or failures that would have precluded normal operation. - [NTSB ERA15LA248](https://openairdocs.org/ntsb/ERA15LA248.md): Cessna 152 · St. Augustine, FL · Accident · No injuries · Limited investigation · Final report · Jun 18, 2015 · N6553L · Substantial damage > A partial loss of engine power for reasons that could not be determined based on the available information. - [NTSB ERA15LA123](https://openairdocs.org/ntsb/ERA15LA123.md): American AA-1 · Fort Meade, MD · Accident · Serious injuries · Limited investigation · Final report · Feb 8, 2015 · N6116L · Substantial damage > The mechanic’s failure to detect the incorrect dry valve tappet clearances while troubleshooting ongoing engine issues, which resulted in partial loss of engine power during takeoff. Contributing to the partial loss of engine power was the mechanic's failure… - [NTSB CEN15LA063](https://openairdocs.org/ntsb/CEN15LA063.md): Siegel Gerald Long EZ · McGregor, TX · Accident · Serious injuries · Limited investigation · Final report · Nov 30, 2014 · N7015T · Substantial damage > A loss of engine power during takeoff due to excessive debris in the fuel system. - [NTSB WPR14LA153](https://openairdocs.org/ntsb/WPR14LA153.md): Zenair CH2T · Woodland, CA · Accident · No injuries · Limited investigation · Final report · Mar 6, 2014 · N285AM · Substantial damage > A total loss of engine power during approach due to carburetor icing, which resulted in an off-airport landing into trees. - [NTSB CEN14FA057](https://openairdocs.org/ntsb/CEN14FA057.md): Cessna 152 · Spring, TX · Accident · 2 fatal · Field investigation · Final report · Nov 18, 2013 · N555UF · Substantial damage > The flight instructor's failure to maintain airspeed following a partial loss of engine power for reasons that could not be determined during postaccident examination, which resulted in an aerodynamic stall and subsequent loss of airplane control. - [NTSB ANC12LA096](https://openairdocs.org/ntsb/ANC12LA096.md): Taylorcraft F21 · Willow, AK · Accident · Serious injuries · Limited investigation · Final report · Sep 3, 2012 · N2005E · Substantial damage > The pilot’s failure to maintain control of the airplane after a loss of engine power during takeoff due to carburetor ice. - [NTSB CEN12CA599](https://openairdocs.org/ntsb/CEN12CA599.md): Cessna 152 · Rockford, IL · Accident · No injuries · Data collection · Final report · Aug 17, 2012 · N152BA · Substantial damage > A partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no anomalies. - [NTSB ANC12CA072](https://openairdocs.org/ntsb/ANC12CA072.md): Piper PA-12 · Quinhagak, AK · Accident · No injuries · Data collection · Final report · Jul 6, 2012 · N7779H · Substantial damage > The pilot's failure to use continuous carburetor heat while operating in conditions conducive to carburetor icing, which resulted in the development of carburetor ice and a subsequent partial loss of engine power. - [NTSB ERA12LA106](https://openairdocs.org/ntsb/ERA12LA106.md): Cessna 152 · Venice, FL · Accident · No injuries · Limited investigation · Final report · Dec 9, 2011 · N471TC · Substantial damage > A loss of engine power during takeoff for reasons that could not be determined because postaccident examination and testing did not reveal any anomalies that would have precluded normal operation. - [NTSB CEN12LA077](https://openairdocs.org/ntsb/CEN12LA077.md): Cessna 152 · Princeton, MN · Accident · No injuries · Limited investigation · Final report · Nov 22, 2011 · N6436P · Substantial damage > The inadequate installation of the threaded insert in the No. 2 cylinder spark plug hole by maintenance personnel, which resulted in a loss of engine power during initial climb. - [NTSB ERA11LA103](https://openairdocs.org/ntsb/ERA11LA103.md): Cessna 152 · Wimauma, FL · Accident · No injuries · Limited investigation · Final report · Dec 31, 2010 · N28BA · Substantial damage > The mechanic/pilot's failure to detect a visible exhaust gas leak and cracked cylinder head immediately prior to the accident flight, which resulted in a partial loss of engine power during initial climb. Contributing to the accident was an inadequate… - [NTSB ERA10LA187](https://openairdocs.org/ntsb/ERA10LA187.md): Cessna 152 · Moore, SC · Accident · No injuries · Limited investigation · Final report · Mar 24, 2010 · N93441 · Substantial damage > The certificated mechanic's improper installation of a helicoil, which resulted in the separation of a sparkplug and the helicoil and led to a partial loss of engine power. - [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 CEN09LA490](https://openairdocs.org/ntsb/CEN09LA490.md): Grumman American AA-1B · Whitney, TX · Accident · Minor injuries · Limited investigation · Final report · Aug 3, 2009 · N1644R · Substantial damage > A partial loss of engine power for undetermined reasons. - [NTSB WPR09LA380](https://openairdocs.org/ntsb/WPR09LA380.md): Davenport DAVE-EZ · Santa Monica, CA · Accident · Serious injuries · Limited investigation · Final report · Aug 2, 2009 · N7CE · Substantial damage > The loss of engine power for undetermined reasons. Contributing to the accident was the pilot's failure to maintain aircraft control during the forced landing. - [NTSB WPR09LA205](https://openairdocs.org/ntsb/WPR09LA205.md): Cessna 152 · Carlsbad, CA · Accident · No injuries · Limited investigation · Final report · Apr 20, 2009 · N48259 · Substantial damage > A partial loss of engine power during takeoff due to carbon fouling of a spark plug. ## 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 ('41505') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_events.parquet' e WHERE e.case_mkey = x.case_mkey AND e.aircrafts_position = x.position AND e."isDefiningEvent" AND e."tier2Number" = '342')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb-events/342/cases?engine=41505 --- 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.