NTSB investigations: Lycoming 0-235 series
29 cases on aircraft whose registry engine model is Lycoming 0-235 series, where the defining event was Loss of engine power (partial). Aircraft are matched to the registry by N-number and event date, checked against the reported serial number, make and model, so older matches can be wrong.
Cases per year
| 2009 | 4 |
|---|---|
| 2010 | 2 |
| 2011 | 2 |
| 2012 | 3 |
| 2013 | 1 |
| 2014 | 2 |
| 2015 | 4 |
| 2016 | 3 |
| 2017 | 1 |
| 2018 | 3 |
| 2020 | 1 |
| 2022 | 1 |
| 2024 | 1 |
| 2026 | 1 |
Where
Open the mapLatest cases
Query with SQL
duckdb -csv -c "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"Prints the whole list as CSV. It reads the release’s Parquet files over HTTPS, so there’s nothing to download first. Install DuckDB to run it.
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" DESCRun it at the DuckDB prompt, or in any tool that reads Parquet over HTTPS. More ways to query the release are on Use the data.
NTSB CEN26LA330Accident · Minor injuriesClass 3 · LimitedPreliminary reportCessna 152 · Bolingbrook, ILOn 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 CEN25LA054Accident · No injuriesClass 3 · LimitedFinal reportAmerican AA-1B · Brenham, TXA partial loss of engine power due to an obstructed induction system from a mud dauber nest.NTSB WPR22LA334Accident · Serious injuriesClass 3 · LimitedFinal reportBuxbaum Mark Edward Long EZ · Medicine Bow, WYA partial loss of engine power due to the fatigue fracture of the No. 4 exhaust valve head.NTSB WPR20LA148Accident · Serious injuriesClass 3 · LimitedFinal reportAmerican AA-1A · Blythe, CAThe 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 ERA19LA069Accident · No injuriesLimited investigationFinal reportCessna 152 · Bell Glade, FLA 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 ERA18LA259Accident · No injuriesLimited investigationFinal reportCessna 152 · St. Augustine, FLThe 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 WPR18LA148Accident · No injuriesClass 3 · LimitedFinal reportCessna 152 · Hillsboro, ORThe partial loss of engine power during a go-around due to the loose copper electrode finger inside the left magneto.NTSB WPR17LA175Accident · Serious injuriesLimited investigationFinal reportGrumman AA1 · Phoenix, AZThe 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 CEN16LA394Accident · Serious injuriesLimited investigationFinal reportPiper PA 22-108 · Pearland, TXA 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 WPR16FA124Accident · 2 fatalField investigationFinal reportGrumman American Avn. AA 1B · Hawthorne, CAThe 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 ERA16LA166Accident · No injuriesLimited investigationFinal reportChampion 7ECA · Tannersville, PAA loss of engine power for reasons that could not be determined based on the available evidence.NTSB CEN16LA025Accident · No injuriesLimited investigationFinal reportChampion 7ECA · Sheridan, ARThe partial loss of engine power due to carburetor icing.NTSB ERA15LA276Accident · No injuriesLimited investigationFinal reportGrumman American Avn. AA1B · Lititz, PAA 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 ERA15LA248Accident · No injuriesLimited investigationFinal reportCessna 152 · St. Augustine, FLA partial loss of engine power for reasons that could not be determined based on the available information.NTSB ERA15LA123Accident · Serious injuriesLimited investigationFinal reportAmerican AA-1 · Fort Meade, MDThe 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 CEN15LA063Accident · Serious injuriesLimited investigationFinal reportSiegel Gerald Long EZ · McGregor, TXA loss of engine power during takeoff due to excessive debris in the fuel system.NTSB WPR14LA153Accident · No injuriesLimited investigationFinal reportZenair CH2T · Woodland, CAA total loss of engine power during approach due to carburetor icing, which resulted in an off-airport landing into trees.NTSB CEN14FA057Accident · 2 fatalField investigationFinal reportCessna 152 · Spring, TXThe 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 ANC12LA096Accident · Serious injuriesLimited investigationFinal reportTaylorcraft F21 · Willow, AKThe pilot’s failure to maintain control of the airplane after a loss of engine power during takeoff due to carburetor ice.NTSB CEN12CA599Accident · No injuriesData collectionFinal reportCessna 152 · Rockford, ILA partial loss of engine power for reasons that could not be determined because postaccident examination of the engine revealed no anomalies.NTSB ANC12CA072Accident · No injuriesData collectionFinal reportPiper PA-12 · Quinhagak, AKThe 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 ERA12LA106Accident · No injuriesLimited investigationFinal reportCessna 152 · Venice, FLA 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 CEN12LA077Accident · No injuriesLimited investigationFinal reportCessna 152 · Princeton, MNThe 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 ERA11LA103Accident · No injuriesLimited investigationFinal reportCessna 152 · Wimauma, FLThe 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 ERA10LA187Accident · No injuriesLimited investigationFinal reportCessna 152 · Moore, SCThe 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 WPR09LA446Accident · Minor injuriesLimited investigationFinal reportGrumman American Avn. AA-1B · Creswell, ORA partial loss of engine power due to the malfunction of the engine's right magneto.NTSB CEN09LA490Accident · Minor injuriesLimited investigationFinal reportGrumman American AA-1B · Whitney, TXA partial loss of engine power for undetermined reasons.NTSB WPR09LA380Accident · Serious injuriesLimited investigationFinal reportDavenport DAVE-EZ · Santa Monica, CAThe 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 WPR09LA205Accident · No injuriesLimited investigationFinal reportCessna 152 · Carlsbad, CAA partial loss of engine power during takeoff due to carbon fouling of a spark plug.