NTSB investigations: Lycoming IO-540-AE1A5, 2025
13 cases on aircraft whose registry engine model is Lycoming IO-540-AE1A5. 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
| 2007 | 5 |
|---|---|
| 2008 | 4 |
| 2009 | 6 |
| 2010 | 3 |
| 2011 | 3 |
| 2012 | 9 |
| 2013 | 8 |
| 2014 | 6 |
| 2015 | 10 |
| 2016 | 6 |
| 2017 | 11 |
| 2018 | 8 |
| 2019 | 14 |
| 2020 | 5 |
| 2021 | 15 |
| 2022 | 8 |
| 2023 | 8 |
| 2024 | 12 |
| 2025 | 13 |
| 2026 | 6 |
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 year(c.\"eventDate\") = 2025
AND c.\"mKey\" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41899'))
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 year(c."eventDate") = 2025
AND c."mKey" IN (SELECT x.case_mkey FROM 'https://openairdocs.org/data/latest/ntsb_aircrafts.parquet' x WHERE x.engine_model_code IN ('41899'))
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 CEN25LA389Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 · Decatur, TXThe pilot’s loss of control during an off-airport, pinnacle landing, and the flight instructor’s inadequate supervision of the instructional flight.NTSB WPR25LA262Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Burlington, WAThe pilot’s failure to see and avoid the light pole, which resulted in a collision with the light pole and subsequent ground impact.NTSB CEN25LA326Accident · No injuriesClass 3 · LimitedPreliminary reportRobinson Helicopter R44 II · Cape Girardeau, MOOn August 16, 2025, at 1150 central daylight time, a Robinson R44 II helicopter, N24DF was substantially damaged when it was involved in an accident near Cape Girardeau, Missouri. The pilot and three passengers were not injured. The helicopter was operated as…NTSB WPR25LA239Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Ponderosa Pines, MTThe pilot’s improper pedal application during an approach to a hover.NTSB ERA25LA267Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Inlet, NYThe pilot’s failure to maintain control of the helicopter during the landing.NTSB CEN25LA237Accident · Serious injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Pecos, TXThe pilot’s failure to maintain aircraft control during gusty wind conditions.NTSB ANC25LA064Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Palmer, AKThe pilot’s diverted attention during takeoff in flat light conditions, which resulted in a loss of visual reference with terrain.NTSB ERA25LA240Accident · Serious injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Hawesville, KYThe pilot’s failure to maintain clearance from power lines during low-level agricultural spray operations.NTSB CEN25FA183Accident · 1 fatalClass 3 · FieldPreliminary reportRobinson Helicopter R44 II · Miami, TXOn May 23, 2025, about 0718 central daylight time, a Robinson Helicopter Company R44 II helicopter, N1195P, was destroyed when it was involved in an accident near Miami, Texas. The student pilot was fatally injured. The helicopter was operated as a Title 14…NTSB WPR25LA110Accident · Minor injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Las Vegas, NVThe pilot’s loss of helicopter control after the door opened during takeoff. Contributing to the accident was the pilot’s failure to confirm that the door was properly closed before departure.NTSB CEN25LA116Accident · No injuriesClass 3 · LimitedPreliminary reportRobinson Helicopter R44 II · Chicago, ILOn March 10, 2025, about 18:30 central daylight time, a Robinson Helicopter R44 II, N128AF was substantially damaged when it was involved in an accident near Chicago, Illinois. The pilot and both passengers were not injured. The helicopter was operated under…NTSB CEN25LA105Accident · Serious injuriesClass 3 · LimitedFinal reportRobinson Helicopter R44 II · Edgemont, SDThe pilot’s failure to properly identify the proper anchor point for the supplemental harness and the crew’s incorrect use of the restraint system structure as an anchor point, which resulted in the separation of the structure.NTSB CEN25FA104Accident · 2 fatalClass 3 · FieldPreliminary reportRobinson Helicopter R44 · Uvalde, TXOn February 27, 2025, about 1319 central standard time, a Robinson Helicopter Company (RHC) R44 helicopter, N144SG, sustained substantial damage when it was involved in an accident near Uvalde, Texas. The commercial pilot and the passenger sustained fatal…