NTSB investigations: Lycoming IO-540-AE1A5
14 cases on aircraft whose registry engine model is Lycoming IO-540-AE1A5, 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
| 2009 | 2 |
|---|---|
| 2014 | 1 |
| 2015 | 1 |
| 2016 | 2 |
| 2019 | 2 |
| 2020 | 1 |
| 2021 | 3 |
| 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 ('41899')
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 ('41899')
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 ANC26LA084Accident · Minor injuriesClass 3 · LimitedPreliminary reportRobinson Helicopter R44 II · Anthony, FLOn August 12, 2026, at approximately 2305 eastern daylight time, a Robinson R44 Raven II helicopter, N861MP, was substantially damaged when it was involved in an accident near Anthony, Florida. The pilot and passenger sustained minor injuries. The helicopter…NTSB WPR24LA241Accident · No injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Herriman, UTA hard landing following a total loss of engine power due to fuel starvation as a result of the improper idle setting of the helicopter’s engine. Contributing to the loss of engine power was the instructor’s reduction of engine power past that recommended by…NTSB CEN21LA284Accident · No injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Reserve, LAA total loss of engine power for undetermined reasons.NTSB GAA21WA047Accident · Minor injuriesClass 5 · ForeignRobinson Helicopter R44 II · Rosh Pinna, IsraelNTSB CEN21LA109Accident · No injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Albany, TXThe pilot’s inadequate pretakeoff checks which resulted in the magneto switch (key) remaining in the OFF position during the takeoff sequence and initial climb and the right magneto grounding intermittently.NTSB WPR20LA119Accident · No injuriesClass 3 · LimitedFinal reportRobinson R44 · Hillsboro, ORThe total loss of engine power during takeoff due to the delamination of the fuel servo induction air inlet duct tube.NTSB CEN19FA160Accident · 3 fatalClass 3 · FieldFinal reportRobinson R44 · Cass, ARA loss of engine power for reasons that could not be determined based on the available information.NTSB ERA19FA142Accident · 1 fatalField investigationFinal reportRobinson R44 II · Tampa, FLContamination of and an inadequate bond between the two layers of fabric comprising the helicopter engine's air induction inlet duct, which resulted a partial collapse of the duct, obstruction of the airflow into the engine, and a total loss of engine power.NTSB WPR16LA165Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Gunnison, UTA total loss of engine power for reasons that could not be determined based on the available evidence.NTSB ANC16IA013Incident · No injuriesIncident investigationFinal reportRobinson Helicopter R44 II · Anchorage, AKThe overhaul facility's improper and excessive use of an approved lubricant during overhaul of the fuel injection servo, which resulted in a disruption of fuel flow and a total loss of engine power.NTSB ANC16LA010Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Valdez, AKThe overhaul facility’s improper and excessive use of an approved lubricant during overhaul of the fuel injection servo, which resulted in a disruption of fuel flow and a total loss of engine power.NTSB WPR14LA353Accident · Minor injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Pahrump, NVA total loss of engine power during a practice autorotation 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 WPR09LA460Accident · Serious injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Valley Center, CAThe failure of the engine’s camshaft due to fatigue of unknown origin.NTSB WPR09LA312Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Lakeport, CAA loss of engine power while maneuvering for undetermined reasons.