NTSB investigations: Lycoming IO-540 series
31 cases on aircraft whose registry engine model is Lycoming IO-540 series, where the defining event was Loss of engine power (total). 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 |
|---|---|
| 2010 | 2 |
| 2012 | 1 |
| 2013 | 4 |
| 2014 | 4 |
| 2015 | 3 |
| 2017 | 2 |
| 2018 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 2023 | 1 |
| 2024 | 2 |
| 2025 | 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 ('41530', '41585')
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\" = '341'))
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 ('41530', '41585')
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" = '341'))
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 ERA25LA215Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA32-300 · Branford, CTMaintenance personnel's improper installation and inspection of the crankshaft gear bolt during major overhaul, which resulted in the crankshaft gear disengaging from the accessory gears which led to a total loss of engine power.NTSB WPR25LA136Accident · No injuriesClass 3 · LimitedPreliminary reportD'Apuzzo Senior Aero Sport · Phoenix, AZOn April 19, 2025, about 1106 Pacific daylight time, an experimental amateur built D'Apuzzo Senior Aero Sport, N321WC, was substantially damaged when it was involved in an accident near Phoenix, Arizona. The pilot was not injured. The airplane was operated as…NTSB CEN24LA378Accident · No injuriesClass 3 · LimitedFinal reportPiper PA32 · Caro, MIA total loss of engine power due to maintenance personnel’s failure to properly tighten the fuel supply line B-nut at the fuel servo.NTSB CEN24LA155Accident · Minor injuriesClass 3 · LimitedFinal reportPiper PA-32-301 · Sullivan, MOA bearing failure that resulted in fatigue failure of the crankshaft and a subsequent total loss of engine power.NTSB GAA23WA127Accident · No injuriesClass 5 · ForeignPiper PA-23-250 · San José Pinula, GuatemalaNTSB WPR21LA357Accident · Serious injuriesClass 3 · LimitedFinal reportFonville Swearingen SX300 · Buckeye, AZThe total loss of engine power due to the failure of the left magneto.NTSB ERA21LA241Accident · Serious injuriesClass 4 · LimitedFinal reportPiper PA-24-260 · Robbinsville, NJThe pilot’s mismanagement of fuel, which resulted in a total loss of engine power.NTSB ERA21LA123Accident · No injuriesClass 4 · LimitedFinal reportPiper PA-32-301 · Homestead, FLA total loss of power for reasons that could not be determined, as the airplane was not recovered from the water following the ditching.NTSB WPR20LA239Accident · Minor injuriesClass 3 · LimitedFinal reportVans RV7 · Henefer, UTThe total loss of engine power due to the separation of the idler gear shaft bolts as a result of improper installation, which allowed for the idler gear to become disengaged.NTSB WPR20LA009Accident · Minor injuriesClass 3 · LimitedFinal reportCessna 206 · Stockton, CAA total loss of engine power after takeoff for reasons that could not be determined based on the available information.NTSB CEN19LA098Accident · Serious injuriesClass 3 · LimitedFinal reportPiper PA32R · Waterloo, ILThe loss of engine power due to a connecting rod failure for reasons that could not be determined due to secondary mechanical damage, which resulted in a subsequent forced landing.NTSB CEN18LA348Accident · No injuriesLimited investigationFinal reportPiper PA32R · Falcon, COThe pilot's decision to depart with an inoperative left magneto, which resulted in degraded climb performance in high-density altitude conditions and a subsequent emergency landing.NTSB ANC18LA058Accident · No injuriesLimited investigationFinal reportRobinson R44 · Bettles, AKMaintenance personnel's application of insufficient preload on the attachment hardware for the idler gear shaft during engine overhaul, which resulted in the dismounting of the idler gear shaft assembly due to wear and deformation and the subsequent total…NTSB WPR17LA168Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Lake Sutherlin, MTThe pilot’s transition into an out-of-ground-effect hover in high-density altitude conditions that exceeded the helicopter’s performance capabilities, which resulted in loss of rotor rpm.NTSB WPR17LA054Accident · 1 fatalLimited investigationFinal reportJohnson Harmon Rocket · Corona, CAA total loss of engine power during takeoff due to fuel starvation as a result of a failure of internal components of the fuel servo.NTSB ERA15LA294Accident · No injuriesLimited investigationFinal reportCommander 114 · Reading, PAThe improper installation of the fuel supply line fitting at the fuel manifold, which resulted in the line loosening in-flight, fuel leakage, and a subsequent total loss of engine power.NTSB WPR15LA196Accident · No injuriesLimited investigationFinal reportPiper PA 32R-301 · Boulder City, NVA total loss of engine power during cruise flight for reasons that could not be determined based on the available evidence.NTSB CEN15LA231Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Columbia, ILA total loss of engine power while maneuvering at low altitude for reasons that could not be determined during postaccident examination.NTSB WPR14LA345Accident · Minor injuriesLimited investigationFinal reportPiper PA 28-236 · Salmon, IDMaintenance personnel’s improper surface preparation of the accessory mount pad for the installation of the engine’s dry vacuum pump, which resulted in the loss of engine oil, oil pressure, and engine power during flight. Contributing to the accident was the…NTSB ERA14LA369Accident · Serious injuriesLimited investigationFinal reportPiper PA-32-300 · Helena, ALA total loss of engine power for reasons that could not be determined due to postcrash fire damage.NTSB CEN14CA318Accident · No injuriesData collectionFinal reportMeyer Geoffrey A Goat · Wolcott, COThe failure of an oil line leading to the oil pressure transducer which resulted in oil starvation and subsequent loss of engine power.NTSB WPR14FA218Accident · 2 fatalField investigationFinal reportNebert Vans RV-10 · Toledo, ORA total loss of engine power due to fuel starvation because of a blocked fuel line that resulted from the pilot’s improper maintenance practices and the pilot’s subsequent failure to maintain adequate airspeed while attempting a forced landing, which led to…NTSB WPR14LA071Accident · No injuriesLimited investigationFinal reportPiper PA 32-301 · Los Angeles, CAThe total loss of engine power during takeoff due to fuel starvation, which resulted from the pilot’s failure to adequately manage the fuel supply.NTSB CEN13LA233Accident · No injuriesLimited investigationFinal reportPiper PA-32-301 · Paris, TXThe improper installation of the connecting rod bolts, which resulted in an engine failure.NTSB CEN13LA194Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Eagle Nest, NMA total loss of engine power due to a rapid throttle change during autorotation, which the flight instructor initiated in response to a low rotor rpm warning, which resulted from the separation of one of the magnets used to provide rotor rpm indications from…NTSB WPR13LA085Accident · Minor injuriesLimited investigationFinal reportJeremiah Jackson Vans RV-10 · Julian, CAA loss of engine power due to oil starvation as a result of a disconnected oil line. Contributing to the accident was an insufficiently tightened oil line fitting.NTSB ERA12FA265Accident · Serious injuriesField investigationFinal reportSapp Larry E Seawind 3000 · Deland, FLA total loss of engine power for reasons that could not be determined because the damage and postimpact fire precluded thorough examination of the engine and its systems.NTSB ERA10FA409Accident · 1 fatalField investigationFinal reportPiper PA-32R-301 · Washington, GAThe manufacturer's inadequate quality control and improper manufacture of the fuel servo diaphragm assembly, which resulted in fatigue cracking of the hub stud and subsequent loss of engine power due to fuel starvation.NTSB WPR10LA272Accident · No injuriesLimited investigationFinal reportEagle Eagle DW-1 · Waterville, WAA worn wire in the magneto system, which allowed intermittent grounding and a loss of engine power.NTSB LAX08CA249Accident · No injuriesData collectionFinal reportFowler SX300 · Cheyenne, WYLoss of engine power due to fuel starvation.NTSB DFW08CA136Accident · No injuriesData collectionFinal reportPiper PA-36 · Thomas, OKThe disconnected throttle linkage resulting in the loss of engine power during takeoff-initial climb. A factor contributing to the accident was the muddy forced landing site.