NTSB investigations: Lycoming IO-540-AE1A5, MO
7 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 | 1 |
|---|---|
| 2008 | 1 |
| 2013 | 1 |
| 2019 | 1 |
| 2022 | 1 |
| 2024 | 1 |
| 2025 | 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.\"eventStateOrRegion\" = 'MO' AND c.\"eventCountry\" = 'USA'
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 c."eventStateOrRegion" = 'MO' AND c."eventCountry" = 'USA'
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 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 CEN24LA252Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · New Florence, MOThe pilot’s failure to maintain proper altitude/clearance from a dead tree limb during an aerial application flight.NTSB CEN22LA350Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Marshall, MOThe pilot’s failure to adequately survey a field for obstructions prior to a low-level aerial application pass, which resulted in an impact with a powerline.NTSB GAA19CA476Accident · No injuriesData collectionFinal reportRobinson R44 · Lebanon, MOThe pilot's loss of yaw control and failure to maintain a proper descent rate and his subsequent improper use of the collective instead of the antitorque pedals to correct the yaw, which resulted in a hard landing.NTSB CEN13FA295Accident · 2 fatalField investigationFinal reportRobinson Helicopter R44 II · Cross Timbers, MOThe pilot's failure to see and avoid a power line during the low-altitude flight.NTSB DFW08FA218Accident · 2 fatalField investigationFinal reportRobinson R44 II · Ridgedale, MOAn in-flight loss of control for undetermined reasons.NTSB CHI08CA023Accident · No injuriesData collectionFinal reportRobinson R44 Raven II · Morrison, MOLoss of control on the ground due to aircraft control not being maintained by the pilot. Contributing factors were the gusting winds and the uneven ground.