# NTSB investigations: Lycoming IO-540-AE1A5

NTSB aviation accident and incident investigations since 1962: the probable cause, findings, aircraft, crew, weather and docket of each, linked to the FAA registry and the FAA’s own reports.

Page 1 of 4 · 160 cases

## Latest cases

- [NTSB ANC26LA103](https://openairdocs.org/ntsb/ANC26LA103.md): Robinson Helicopter R44 II · Colquitt, GA · Accident · No injuries · Class 3 · Limited · Preliminary report · Sep 11, 2026 · N4026E · Substantial damage
  > On September 11, 2026 about 0830 eastern daylight time, a Robinson R44 helicopter, N4026E, was substantially damaged when it was involved in an accident near Colquitt, Georgia. The pilot was not injured. The helicopter was operated as a Title 14 Code of…
- [NTSB ANC26LA084](https://openairdocs.org/ntsb/ANC26LA084.md): Robinson Helicopter R44 II · Anthony, FL · Accident · Minor injuries · Class 3 · Limited · Preliminary report · Aug 13, 2026 · N861MP · Substantial damage
  > On 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 CEN26LA276](https://openairdocs.org/ntsb/CEN26LA276.md): Robinson Helicopter R44 II · Bennett, IA · Accident · No injuries · Class 3 · Limited · Preliminary report · Aug 2, 2026 · N26KL · Substantial damage
  > On August 2, 2026, about 1318 central daylight time, a Robinson Helicopter Company R44 II helicopter, N26KL, was substantially damaged when it was involved in an accident near Bennett, Iowa. The pilot was not injured. The helicopter was operated as a Title 14…
- [NTSB CEN26LA256](https://openairdocs.org/ntsb/CEN26LA256.md): Robinson Helicopter R44 II · Coralville, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 16, 2026 · N322TC · Substantial damage
  > The pilot’s failure to maintain clearance from a power line during a low-level aerial application flight.
- [NTSB CEN26LA168](https://openairdocs.org/ntsb/CEN26LA168.md): Robinson Helicopter R44 · Mount Blanco, TX · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 17, 2026 · N445JS · Substantial damage
  > The 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 WPR26LA083](https://openairdocs.org/ntsb/WPR26LA083.md): Robinson R44 · Parkman, WY · Accident · No injuries · Class 4 · Limited · Final report · Jan 19, 2026 · N996NR · 2 aircraft · Substantial damage
  > The pilots’ failure to maintain separation while conducting air work in a common operational area. Contributing to the accident was the pilots’ divided attention associated with the mission activity and unreliable radio communications.
- [NTSB CEN25LA389](https://openairdocs.org/ntsb/CEN25LA389.md): Robinson Helicopter R44 · Decatur, TX · Accident · No injuries · Class 4 · Limited · Final report · Sep 19, 2025 · N831VA · Substantial damage
  > The pilot’s loss of control during an off-airport, pinnacle landing, and the flight instructor’s inadequate supervision of the instructional flight.
- [NTSB WPR25LA262](https://openairdocs.org/ntsb/WPR25LA262.md): Robinson Helicopter R44 II · Burlington, WA · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 18, 2025 · N877DR · Substantial damage
  > The pilot’s failure to see and avoid the light pole, which resulted in a collision with the light pole and subsequent ground impact.
- [NTSB CEN25LA326](https://openairdocs.org/ntsb/CEN25LA326.md): Robinson Helicopter R44 II · Cape Girardeau, MO · Accident · No injuries · Class 3 · Limited · Preliminary report · Aug 16, 2025 · N24DF · Substantial damage
  > On 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 WPR25LA239](https://openairdocs.org/ntsb/WPR25LA239.md): Robinson Helicopter R44 II · Ponderosa Pines, MT · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 3, 2025 · N750GT · Substantial damage
  > The pilot’s improper pedal application during an approach to a hover.
- [NTSB ERA25LA267](https://openairdocs.org/ntsb/ERA25LA267.md): Robinson Helicopter R44 II · Inlet, NY · Accident · No injuries · Class 4 · Limited · Final report · Jul 9, 2025 · N67RW · Substantial damage
  > The pilot’s failure to maintain control of the helicopter during the landing.
- [NTSB CEN25LA237](https://openairdocs.org/ntsb/CEN25LA237.md): Robinson Helicopter R44 II · Pecos, TX · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 4, 2025 · N992TP · Substantial damage
  > The pilot’s failure to maintain aircraft control during gusty wind conditions.
- [NTSB ANC25LA064](https://openairdocs.org/ntsb/ANC25LA064.md): Robinson Helicopter R44 II · Palmer, AK · Accident · No injuries · Class 4 · Limited · Final report · Jun 30, 2025 · N531AT · Substantial damage
  > The pilot’s diverted attention during takeoff in flat light conditions, which resulted in a loss of visual reference with terrain.
- [NTSB ERA25LA240](https://openairdocs.org/ntsb/ERA25LA240.md): Robinson Helicopter R44 II · Hawesville, KY · Accident · Serious injuries · Class 4 · Limited · Final report · Jun 25, 2025 · N144WK · Substantial damage
  > The pilot’s failure to maintain clearance from power lines during low-level agricultural spray operations.
- [NTSB CEN25FA183](https://openairdocs.org/ntsb/CEN25FA183.md): Robinson Helicopter R44 II · Miami, TX · Accident · 1 fatal · Class 3 · Field · Preliminary report · May 23, 2025 · N1195P · Destroyed
  > On 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 WPR25LA110](https://openairdocs.org/ntsb/WPR25LA110.md): Robinson Helicopter R44 II · Las Vegas, NV · Accident · Minor injuries · Class 3 · Limited · Final report · Mar 10, 2025 · N44KY · Substantial damage
  > The 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 CEN25LA116](https://openairdocs.org/ntsb/CEN25LA116.md): Robinson Helicopter R44 II · Chicago, IL · Accident · No injuries · Class 3 · Limited · Preliminary report · Mar 10, 2025 · N128AF · Substantial damage
  > On 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 CEN25LA105](https://openairdocs.org/ntsb/CEN25LA105.md): Robinson Helicopter R44 II · Edgemont, SD · Accident · Serious injuries · Class 3 · Limited · Final report · Feb 27, 2025 · N6555C · No damage
  > The 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 CEN25FA104](https://openairdocs.org/ntsb/CEN25FA104.md): Robinson Helicopter R44 · Uvalde, TX · Accident · 2 fatal · Class 3 · Field · Preliminary report · Feb 27, 2025 · N144SG · Substantial damage
  > On 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 WPR25LA034](https://openairdocs.org/ntsb/WPR25LA034.md): Robinson Helicopter R44 II · Durkee, OR · Accident · No injuries · Class 3 · Limited · Final report · Nov 7, 2024 · N4361R · Substantial damage
  > The pilot's inadequate performance planning, which resulted in insufficient engine power to transition into an out-of-ground-effect hover at a high gross weight.
- [NTSB CEN25FA034](https://openairdocs.org/ntsb/CEN25FA034.md): Robinson Helicopter R44 II · Iowa, LA · Accident · 3 fatal · Class 3 · Field · Preliminary report · Nov 2, 2024 · N62CD · Destroyed
  > On November 1, 2024, about 2106 central daylight time, a Robinson R-44 II helicopter, N62CD, was destroyed when it was involved in an accident near Iowa, Louisiana. The pilot and two passengers were fatally injured. The helicopter was operated as a Title 14…
- [NTSB ERA24LA393](https://openairdocs.org/ntsb/ERA24LA393.md): Robinson Helicopter R44 II · Ravenel, SC · Accident · No injuries · Class 4 · Limited · Final report · Sep 23, 2024 · N153LA · Substantial damage
  > The pilot’s failure to maintain clearance from terrain, which resulted in the right skid contacting the ground and a subsequent rollover.
- [NTSB WPR24LA307](https://openairdocs.org/ntsb/WPR24LA307.md): Robinson Helicopter R44 II · Basin, MT · Accident · Serious injuries · Class 3 · Limited · Final report · Sep 15, 2024 · N233WT · Substantial damage
  > The pilot’s decision to continue performing a high-performance takeoff in a full throttle and low-rotor-rpm condition, which resulted in a loss of control and subsequent impact with terrain.
- [NTSB ANC24LA079](https://openairdocs.org/ntsb/ANC24LA079.md): Robinson Helicopter R44 II · Palmer, AK · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 18, 2024 · N783AK · Substantial damage
  > The pilot's failure to follow the operator’s procedure manual and attempted to land at a remote landing zone in high wind conditions. Contributing factor was the pilot’s decision to not conduct a fly over of the landing site to determine wind condition which…
- [NTSB WPR24LA241](https://openairdocs.org/ntsb/WPR24LA241.md): Robinson Helicopter R44 II · Herriman, UT · Accident · No injuries · Class 3 · Limited · Final report · Jul 13, 2024 · N6960 · Substantial damage
  > A 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 ANC24FA063](https://openairdocs.org/ntsb/ANC24FA063.md): Robinson Helicopter R44 · Kekaha, HI · Accident · 3 fatal · Class 3 · Field · Final report · Jul 11, 2024 · N144KW · Substantial damage
  > An encounter with turbulence due to downdraft winds that resulted in mast bumping and an in-flight breakup.
- [NTSB CEN24LA252](https://openairdocs.org/ntsb/CEN24LA252.md): Robinson Helicopter R44 II · New Florence, MO · Accident · No injuries · Class 4 · Limited · Final report · Jul 4, 2024 · N225AM · Substantial damage
  > The pilot’s failure to maintain proper altitude/clearance from a dead tree limb during an aerial application flight.
- [NTSB WPR24FA200](https://openairdocs.org/ntsb/WPR24FA200.md): Robinson Helicopter R44 II · Bluestem, WA · Accident · 2 fatal · Class 3 · Field · Final report · Jun 19, 2024 · N323TT · Destroyed
  > The pilot’s failure to manage main rotor rpm during an autorotation, which resulted in a loss of helicopter control. Contributing to the accident was a loss of power for reasons that could not be determined.
- [NTSB ERA24LA236](https://openairdocs.org/ntsb/ERA24LA236.md): Robinson R44 · Gilbertsville, KY · Accident · No injuries · Class 4 · Limited · Final report · Jun 2, 2024 · N220SW · Substantial damage
  > The pilot's failure to maintain control of the helicopter while attempting to take off from sloping terrain.
- [NTSB ERA24LA171](https://openairdocs.org/ntsb/ERA24LA171.md): Robinson Helicopter R44 II · South Kingstown, RI · Accident · No injuries · Class 4 · Limited · Final report · Apr 9, 2024 · N331EL · Substantial damage
  > The pilot’s failure to maintain clearance from the water while maneuvering at low altitude.
- [NTSB ERA24LA118](https://openairdocs.org/ntsb/ERA24LA118.md): Robinson Helicopter R44 II · Miami, FL · Accident · No injuries · Class 4 · Limited · Final report · Feb 1, 2024 · N521LS · Substantial damage
  > Tail rotor contact with an unseen object while performing a precautionary landing to a closed helipad at night.
- [NTSB WPR24LA092](https://openairdocs.org/ntsb/WPR24LA092.md): Robinson Helicopter R44 II · Calexico, CA · Accident · No injuries · Class 4 · Limited · Final report · Dec 6, 2023 · N422DX · Substantial damage
  > The pilot's failure to maintain clearance from power lines during an aerial application flight.
- [NTSB CEN23LA341](https://openairdocs.org/ntsb/CEN23LA341.md): Robinson Helicopter R44 II · Arthur, IL · Accident · Serious injuries · Class 4 · Limited · Final report · Jul 31, 2023 · N644ME · Substantial damage
  > The pilot’s failure to maintain clearance from trees during a low-level aerial application flight.
- [NTSB CEN23LA326](https://openairdocs.org/ntsb/CEN23LA326.md): Robinson Helicopter R44 II · Charles City, IA · Accident · No injuries · Class 4 · Limited · Final report · Jul 26, 2023 · N4174L · Substantial damage
  > The pilot’s improper preflight of the helicopter to ensure that it was within the loading and performance limitations that resulted in settling and impact with terrain during initial climb.
- [NTSB CEN23LA306](https://openairdocs.org/ntsb/CEN23LA306.md): Robinson Helicopter R44 II · Pocahontas, IL · Accident · No injuries · Class 3 · Limited · Final report · Jul 14, 2023 · N62RK · Substantial damage
  > A reported loss of engine power for undetermined reasons.
- [NTSB ERA23LA228](https://openairdocs.org/ntsb/ERA23LA228.md): Robinson Helicopter R44 II · Bradenton, FL · Accident · No injuries · Class 4 · Limited · Final report · May 11, 2023 · N62HT · Substantial damage
  > The pilot’s failure to maintain adequate rotor rpm during landing which resulted in a premature landing on uneven ground and a subsequent rollover.
- [NTSB ANC23LA032](https://openairdocs.org/ntsb/ANC23LA032.md): Robinson Helicopter R44 II · Skwentna, AK · Accident · Minor injuries · Class 4 · Limited · Final report · May 9, 2023 · N704T · Substantial damage
  > The pilot's failure to maintain adequate altitude/clearance from terrain while maneuvering in adverse weather conditions, which resulted in a dynamic rollover.
- [NTSB WPR23LA145](https://openairdocs.org/ntsb/WPR23LA145.md): Robinson Helicopter R44 II · Elko, NV · Accident · No injuries · Class 4 · Limited · Final report · Apr 1, 2023 · N462BA · Substantial damage
  > The pilot’s failure to maintain sufficient altitude and airspeed in gusting tailwind conditions that resulted in an unrecoverable descent and impact with terrain.
- [NTSB CEN23FA142](https://openairdocs.org/ntsb/CEN23FA142.md): Robinson Helicopter R44 II · Port Allen, LA · Accident · 2 fatal · Class 3 · Field · Final report · Mar 26, 2023 · N441PD · Destroyed
  > The pilot’s decision to continue the visual flight rules flight into deteriorating weather conditions, which resulted in spatial disorientation and the loss of aircraft control.
- [NTSB CEN22LA400](https://openairdocs.org/ntsb/CEN22LA400.md): Robinson Helicopter R44 II · San Isidro, TX · Accident · Serious injuries · Class 4 · Limited · Final report · Aug 21, 2022 · N4447A · Substantial damage
  > The pilot’s improper decision to conduct an autorotation with a tailwind, which resulted in a hard landing and substantial damage.
- [NTSB WPR22LA299](https://openairdocs.org/ntsb/WPR22LA299.md): Robinson Helicopter R44 II · Palmer, AK · Accident · Minor injuries · Class 4 · Limited · Final report · Aug 11, 2022 · N987WH · Substantial damage
  > The pilot’s failure to maintain lateral control during an off-field landing, which resulted in loss of control and an impact with terrain.
- [NTSB CEN22LA350](https://openairdocs.org/ntsb/CEN22LA350.md): Robinson Helicopter R44 II · Marshall, MO · Accident · No injuries · Class 4 · Limited · Final report · Jul 31, 2022 · N458SG · Substantial damage
  > The 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 WPR22LA267](https://openairdocs.org/ntsb/WPR22LA267.md): Robinson Helicopter R44 II · Cedar City, UT · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 25, 2022 · N497SU · Substantial damage
  > The student pilot’s failure to maintain rotor rpm and airspeed and the flight instructor's inadequate remedial action to regain helicopter control during the straight-in autorotation which resulted in a hard landing.
- [NTSB CEN22FA288](https://openairdocs.org/ntsb/CEN22FA288.md): Robinson Helicopter R44 II · Blackwell, TX · Accident · 1 fatal · Class 3 · Field · Final report · Jun 26, 2022 · N4124D · Destroyed
  > The pilot’s failure to maintain proper altitude and clearance during low-level aerial application, resulting in an in-flight collision with power lines.
- [NTSB WPR22LA220](https://openairdocs.org/ntsb/WPR22LA220.md): Robinson Helicopter R44 II · Auburn, WA · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 18, 2022 · N944BC · Substantial damage
  > The student pilot’s loss of helicopter control and the flight instructor’s delayed remedial action while providing hover training which resulted in a dynamic rollover.
- [NTSB ERA22LA188](https://openairdocs.org/ntsb/ERA22LA188.md): Robinson Helicopter R44 II · Calhoun, GA · Accident · Minor injuries · Class 4 · Limited · Final report · Apr 12, 2022 · N426DB · Substantial damage
  > The pilot’s failure to maintain clearance from wires during takeoff.
- [NTSB ERA22LA135](https://openairdocs.org/ntsb/ERA22LA135.md): Robinson Helicopter R44 II · White Plains, NY · Accident · No injuries · Class 4 · Limited · Final report · Feb 17, 2022 · N929WA · Substantial damage
  > The pilot’s failure to maintain stabilized lateral control during landing in gusty conditions which resulted in a dynamic rollover when the skids contacted the platform unevenly.
- [NTSB ERA22FA098](https://openairdocs.org/ntsb/ERA22FA098.md): Robinson Helicopter R44 II · Bronson, FL · Accident · 4 fatal · Class 3 · Field · Final report · Dec 31, 2021 · N442VB · Destroyed
  > A loss of control due to spatial disorientation as a result of the noninstrument-rated pilot’s improper decision to attempt a visual flight rules flight at night into an area of known reduced visibility due to fog.
- [NTSB CEN22LA034](https://openairdocs.org/ntsb/CEN22LA034.md): Robinson Helicopter R44 II · Fort Davis, TX · Accident · Minor injuries · Class 4 · Limited · Final report · Nov 10, 2021 · N3027W · Substantial damage
  > The pilot’s encounter of a downdraft from which there was insufficient altitude to recover.
- [NTSB ERA22FA010](https://openairdocs.org/ntsb/ERA22FA010.md): Robinson Helicopter R44 II · Cornwall, NY · Accident · 1 fatal · Class 3 · Field · Final report · Oct 10, 2021 · N637HP · Destroyed
  > The non-instrument-rated pilot’s continued flight into deteriorating weather conditions, which resulted in a loss of control due to spatial disorientation.

Next page: https://openairdocs.org/ntsb.md?engine=41899&page=2

## The whole list in SQL

Runs in DuckDB 1.2 or later on the release's Parquet files over HTTPS:

```sql
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'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=41899

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