NTSB investigations: Lycoming 0-540 series
32 cases on aircraft whose registry engine model is Lycoming 0-540 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
| 2008 | 2 |
|---|---|
| 2009 | 2 |
| 2011 | 4 |
| 2012 | 2 |
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 3 |
| 2018 | 1 |
| 2019 | 3 |
| 2020 | 2 |
| 2021 | 2 |
| 2023 | 2 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 2 |
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 ('41532')
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 ('41532')
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 CEN26LA242Accident · No injuriesClass 3 · LimitedPreliminary reportPiper PA-25-235 · Forest Lake, MNOn July 4, 2026, about 0942 central daylight time, a Piper PA-25-235 airplane, N386AB, was substantially damaged when it was involved in an accident near Forest Lake, Minnesota. The pilot was not injured. The airplane was operated as a Title 14 Code of…NTSB ANC26LA053Accident · Minor injuriesClass 3 · LimitedPreliminary reportPiper PA-28-235 · Key West, FLOn June 14, 2026, at 1035 eastern standard time, a Piper PA-28-235 airplane, N15564, was substantially damaged when it was involved in an accident near Key West, Florida. The pilot was not injured and the passenger sustained minor injuries. The airplane was…NTSB CEN25LA357Accident · Serious injuriesClass 3 · LimitedPreliminary reportPiper PA-24-250 · Gregory, MIOn August 28, 2025, at about 1550 eastern daylight time, a Piper PA-24-250 airplane, N7412P, was substantially damaged when it was involved in an accident near Gregory, Michigan. The pilot was seriously injured. The airplane was operated as a Title 14 Code of…NTSB WPR24FA295Accident · Serious injuriesClass 3 · FieldPreliminary reportPiper PA-24-250 · Hawthorne, CAOn September 6, 2024, at 0036 Pacific daylight time, a Piper PA-24-250, N588CP, was destroyed when it was involved in an accident near Hawthorne, California. The pilot and pilot rated passenger sustained serious injuries. The airplane was operated as a Title…NTSB WPR23FA225Accident · 1 fatalClass 3 · FieldFinal reportCessna R182 · McCall, IDMaintenance personnel's failure to properly torque and inspect the magneto hardware, which resulted in a partial loss of engine power.NTSB GAA23WA159Accident · No injuriesClass 5 · ForeignPiper PA-32-260 · Nicholls Town, BahamasNTSB ERA21FA333Accident · 2 fatalClass 3 · FieldFinal reportPiper PA24 · Wadesboro, NCA partial loss of engine power during takeoff for reasons that could not be determined. Contributing was the pilot’s loss of airplane control, resulting in an aerodynamic stall and impact with trees and terrain.NTSB WPR21LA212Accident · No injuriesClass 3 · LimitedFinal reportMaule M-5-235C · Stanley, IDThe pilot’s failure to use carburetor heat in weather conditions conducive to carburetor icing, resulting in a partial loss of engine power and a forced landing during which the airplane struck an object and nosed over.NTSB ERA21LA019Accident · No injuriesClass 3 · LimitedFinal reportPiper PA32 · Atlanta, GAA partial loss of engine power during takeoff due to a right magneto anomaly, which resulted in the pilot’s decision to abort the takeoff and the subsequent runway excursion.NTSB CEN20LA361Accident · No injuriesClass 3 · LimitedFinal reportCessna R182 · Crowley, LAThe failure of the No. 4 cylinder exhaust valve that resulted in a partial loss of engine power. Based on available evidence, the reason for the failed valve was not determined.NTSB ERA19LA273Accident · Serious injuriesClass 3 · LimitedFinal reportRobinson R44 · Sardis, GAFatigue failure of the fasteners on the engine crankshaft, which resulted in a partial loss of engine power and a subsequent forced landing.NTSB CEN19LA126Accident · No injuriesClass 3 · LimitedFinal reportPiper PA28 · Dwight, ILA partial loss of engine power due to a restriction in fuel flow for undetermined reasons.NTSB CEN19LA071Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA24 · Beechwood, WIA partial loss of engine power for reasons that could not be determined based on the available information.NTSB CEN18LA158Accident · No injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 · East Troy, WIA partial loss of engine power for reasons that could not be determined based on the available information, which resulted in impact with terrain and dynamic rollover during the subsequent attempted landing.NTSB ERA17LA257Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 · Myrtle Beach, SCA loss of available power to the main rotor due to a fractured exhaust pushrod and housing, which allowed engine oil to coat the V-belts. Contributing to the accident was the pilot's decision to continue the tour and his failure to maintain adequate rotor rpm…NTSB WPR17LA096Accident · Minor injuriesLimited investigationFinal reportPiper PA 32-260 · Mukilteo, WAThe improper maintenance of the carburetor, which resulted in a stuck float and a partial loss of engine power during takeoff.NTSB ANC17TA015Accident · Serious injuriesFinal reportPiper PA-32 · Pilot Point, AKThe pilot's continued flight into known icing conditions, which resulted in structural icing and a forced landing on icy, snow-covered terrain.NTSB CEN16LA334Accident · Serious injuriesLimited investigationFinal reportPiper PA 25-235 · Bushton, KSA partial loss of engine power for reasons that could not be determined based on the available information.NTSB CEN15LA404Accident · 1 fatalLimited investigationFinal reportCessna TR182 · Midland, TXThe partial loss of engine power for reasons that could not be determined based on the available evidence.NTSB CEN15LA383Accident · No injuriesLimited investigationFinal reportPiper PA 25-235 · Harvey, NDThe partial loss of engine power due to a failed magneto and two cylinders with low compression. Contributing to the accident was the pilot/owner’s decision to operate the airplane with an ongoing engine issue.NTSB CEN15LA284Accident · Serious injuriesLimited investigationFinal reportCessna TR182 · Casper, WYThe improper repair of the carburetor heat cable sheath to clamp joint, which prevented the proper operation of the carburetor heat and resulted in the loss of engine power.NTSB CEN15LA238Accident · No injuriesLimited investigationFinal reportPiper PA-25-235 · Omega, OKImproper base metal preparation or contamination of the No. 5 cylinder wall before it was coated, which resulted in the coating peeling off of the cylinder wall and contaminating the engine oil and the subsequent partial loss of engine power.NTSB CEN12LA622Accident · No injuriesLimited investigationFinal reportPiper PA-25-235 · Jasper, MOThe total loss of engine power due to separation of a carburetor air box support bracket and subsequent airflow obstruction to the carburetor.NTSB CEN12LA299Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Shawnee, OKThe improper installation of the mixture cable by maintenance personnel, which allowed the mixture cable to entangle with the landing gear during gear extension and led to the subsequent loss of engine power.NTSB CEN12LA118Accident · Minor injuriesLimited investigationFinal reportPiper PA-32-260 · Elk Rapids, MIThe loss of engine power due to the failure of the exhaust valve.NTSB WPR11LA374Accident · Minor injuriesLimited investigationFinal reportSIAI Marchetti F.260 · Coalinga, CAA partial loss of engine power immediately after takeoff for undetermined reasons.NTSB WPR11LA340Accident · No injuriesLimited investigationFinal reportPiper PA-24-250 · Lopez, WAA partial loss of engine power due to a cracked engine case near the rear cylinder.NTSB WPR11LA311Accident · Minor injuriesLimited investigationFinal reportCessna R182 · Hesperia, CAThe separation of the end baffle cone inside the muffler, which blocked airflow through the engine after takeoff and resulted in a loss of engine power and an off-airport landing into obstacles.NTSB CEN09LA605Accident · Minor injuriesLimited investigationFinal reportPiper PA-32-260 · Troy, MIA loss of engine power during initial climb due to fuel starvation as a result of the pilot's selection of an empty or nearly empty main tank for takeoff.NTSB WPR09LA139Accident · No injuriesLimited investigationFinal reportMaule M-5 · Calexico, CAA loss of engine power for undetermined reasons.NTSB WPR09FA038Accident · 3 fatalField investigationFinal reportPiper PA-32-260 · Sedona, AZThe partial loss of engine power while maneuvering for undetermined reasons.NTSB DFW08LA065Accident · No injuriesLimited investigationFinal reportCessna TR182 · San Antonio, TXSeparation of the turbocharger exhaust stack, which resulted in a loss of engine power.