NTSB investigations: Lycoming IO-540-AE1A5, TX
30 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
| 2009 | 1 |
|---|---|
| 2010 | 1 |
| 2012 | 3 |
| 2013 | 1 |
| 2014 | 3 |
| 2015 | 4 |
| 2016 | 1 |
| 2017 | 1 |
| 2019 | 3 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 2 |
| 2025 | 4 |
| 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.\"eventStateOrRegion\" = 'TX' 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" = 'TX' 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 CEN26LA168Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 · Mount Blanco, TXThe pilot’s failure to maintain proper main rotor rpm during a low-level turn, which resulted in the main rotor rpm drooping, a loss of control at an altitude too low for recovery, and a subsequent impact with terrain.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 CEN25LA237Accident · Serious injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Pecos, TXThe pilot’s failure to maintain aircraft control during gusty wind conditions.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 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…NTSB CEN22LA400Accident · Serious injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · San Isidro, TXThe pilot’s improper decision to conduct an autorotation with a tailwind, which resulted in a hard landing and substantial damage.NTSB CEN22FA288Accident · 1 fatalClass 3 · FieldFinal reportRobinson Helicopter R44 II · Blackwell, TXThe pilot’s failure to maintain proper altitude and clearance during low-level aerial application, resulting in an in-flight collision with power lines.NTSB CEN22LA034Accident · Minor injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Fort Davis, TXThe pilot’s encounter of a downdraft from which there was insufficient altitude to recover.NTSB 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 CEN21LA077Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Marietta, TXThe pilot’s failure to see and avoid a transmission wire during takeoff.NTSB CEN20LA442Accident · No injuriesClass 4 · LimitedFinal reportRobinson Helicopter R44 II · Sterling City, TXThe pilot’s failure to maintain clearance from power lines during an aerial application flight.NTSB CEN20CA085Accident · No injuriesData collectionFinal reportRobinson R44 · Marfa, TXThe pilot's failure to maintain clearance from a fence during low-altitude maneuvering.NTSB ERA20LA054Accident · Minor injuriesClass 3 · LimitedFinal reportRobinson R44 · San Antonio, TXMaintenance personnel’s failure to complete all necessary steps of a service bulletin and subsequent failure to identify the loose lower actuator bearing support bracket during inspections, which resulted in the misalignment of the clutch actuator, resulted…NTSB CEN19TA178Accident · No injuriesClass 3Final reportRobinson R44 · La Ward, TXThe pilot’s failure to maintain helicopter control during a course reversal, which resulted in impact with terrain.NTSB CEN19LA065Accident · Minor injuriesLimited investigationFinal reportRobinson R44 · Uvalde, TXThe slipping of the sprag clutch due to galling of the sprags and corresponding sprag contact surfaces within the clutch assembly, which rendered the helicopter uncontrollable.NTSB CEN17FA209Accident · 1 fatalField investigationFinal reportRobinson Helicopter R44 II · Dimmitt, TXThe pilot's incapacitation due to scarring from previous heart attacks and severe hypertrophy of the left ventricular wall which resulted in arrhythmia and a loss of control while maneuvering at low altitude.NTSB GAA16CA297Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 · Chireno, TXThe student pilot's selection of unsuitable terrain for landing, which resulted in the helicopter rolling over during landing, and substantial damage to the tail boom.NTSB CEN16LA039Accident · Serious injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Alpine, TXThe pilot’s failure to maintain adequate rotor speed while maneuvering at low altitude, which resulted in a descent from which he was unable to recover. Contributing to the accident was the pilot's decision to conduct the flight at or near the helicopter's…NTSB GAA16CA006Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Devine, TXThe pilot's failure to maintain obstacle clearance during the takeoff, which resulted in the helicopter striking power lines.NTSB CEN15LA439Accident · No injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Alice, TXA loss of engine power during a practice power recovery autorotation for reasons that could not be determined based on the available information.NTSB CEN15LA375Accident · Serious injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Carlos, TXThe pilot’s improper decision to turn the helicopter toward a tailwind during an out-of-ground-effect hover, which resulted in a loss of tail rotor effectiveness. Contributing to the accident was the accident and lead pilots’ inadequate preflight risk…NTSB CEN15CA093Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Horseshoe Bay, TXThe helicopter's contact with the landing pad during a rejected landing.NTSB CEN14LA197Accident · No injuriesLimited investigationFinal reportRobinson R44 - II · Menard, TXThe pilot’s inadequate recovery from a practice autorotation, which resulted in an improper touchdown attitude and collision with terrain.NTSB CEN14LA149Accident · Serious injuriesLimited investigationFinal reportRobinson Helicopter R44 II · Presidio, TXThe pilot’s failure to maintain sufficient rotor rpm when transitioning the helicopter from a hover to forward flight, which resulted in a loss of helicopter control.NTSB CEN13CA124Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Menard, TXThe helicopter landed hard during a forced landing.NTSB CEN13CA053Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Bryan, TXThe pilot’s over-correction in an attempt to stabilize the helicopter during liftoff.NTSB CEN13FA010Accident · 3 fatalField investigationFinal reportRobinson Helicopter R44 II · Blanco, TXThe pilot's loss of helicopter control as a result of spatial disorientation due to dark night conditions and marginal visual flight rules weather conditions.NTSB CEN12CA643Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Slaton, TXThe pilot’s misalignment of the helicopter during landing, which resulted in the helicopter’s fall from a raised platform.NTSB CEN11CA126Accident · Minor injuriesData collectionFinal reportRobinson Helicopter R44 II · Hemphill, TXThe student pilot’s improper decision to carry an unauthorized passenger and the passenger’s loss of control of the helicopter during take-off.NTSB CEN09CA270Accident · No injuriesData collectionFinal reportRobinson Helicopter R44 II · Kent, TXThe pilot's failure to maintain control of the helicopter.