# NTSB investigations: Allison 250 SER 400HP

A list on [Allison 250 SER 400HP](https://openairdocs.org/engine/allison-250-ser-400hp.md).

Matched to the registry by N-number and event date, newest first.

Page 1 of 5 · 231 investigations

- [NTSB CEN26LA181](https://openairdocs.org/ntsb/CEN26LA181.md): Hughes 369HS · Durango, CO · Accident · No injuries · Class 4 · Limited · Final report · May 7, 2026 · N926ES · Substantial damage
  > The flight instructor’s inadequate supervision of the pilot receiving the instruction and the pilot’s improper recovery from a practice autorotation in shifting wind conditions, which resulted in a hard landing.
- [NTSB CEN25LA266](https://openairdocs.org/ntsb/CEN25LA266.md): Bell B206-B · Bloomington, IL · Accident · Minor injuries · Class 4 · Limited · Final report · Jul 18, 2025 · N975TR · Substantial damage
  > The pilot’s failure to avoid power lines during an aerial application flight.
- [NTSB ERA25LA040](https://openairdocs.org/ntsb/ERA25LA040.md): Hughes 369D · Waycross, GA · Accident · Minor injuries · Class 4 · Limited · Final report · Nov 5, 2024 · N11AS · Substantial damage
  > An encounter with a foreign object, which resulted in a loss of control and collision with terrain.
- [NTSB ERA24LA172](https://openairdocs.org/ntsb/ERA24LA172.md): MD Helicopters 369FF · Ceiba, PR · Accident · No injuries · Class 4 · Limited · Final report · Apr 9, 2024 · N5841Z · Substantial damage
  > The pilots’ failure to ensure adequate clearance from the taxiway while performing a quick stop maneuver.
- [NTSB ERA23LA307](https://openairdocs.org/ntsb/ERA23LA307.md): Bell 206 · Terra Alta, WV · Accident · Serious injuries · Class 3 · Limited · Final report · Jul 21, 2023 · N9913K · Substantial damage
  > The pilot’s inability to maneuver the helicopter for recovery after experiencing a strong, unanticipated tailwind in a confined operating area, which resulted in a descent and subsequent impact with terrain.
- [NTSB ERA23LA269](https://openairdocs.org/ntsb/ERA23LA269.md): Bell 206B · Orlando, FL · Accident · No injuries · Class 4 · Limited · Final report · Jun 5, 2023 · N27UK · Substantial damage
  > The pilot’s improper landing flare during a practice autorotation, which resulted in a hard landing.
- [NTSB WPR23LA214](https://openairdocs.org/ntsb/WPR23LA214.md): Bell 206B · Filer, ID · Accident · Minor injuries · Class 4 · Limited · Final report · Jun 3, 2023 · N205PA · Substantial damage
  > The pilot’s improper anti-torque pedal inputs during takeoff, which resulted in a loss of helicopter control during takeoff and subsequent dynamic rollover.
- [NTSB ERA22LA337](https://openairdocs.org/ntsb/ERA22LA337.md): Bell 206B · Pelion, SC · Accident · No injuries · Class 4 · Limited · Final report · Jun 18, 2022 · N515TV · Substantial damage
  > The pilot’s improper landing flare during a practice autorotation.
- [NTSB WPR22LA221](https://openairdocs.org/ntsb/WPR22LA221.md): Bell 206B · Stockton, CA · Accident · No injuries · Class 3 · Limited · Final report · Jun 17, 2022 · N90326 · Substantial damage
  > Tail rotor blade impact with an unidentified object, which resulted in the loss of control and subsequent rollover of the helicopter.
- [NTSB CEN22LA219](https://openairdocs.org/ntsb/CEN22LA219.md): Bell 206B · Cameron, TX · Accident · Minor injuries · Class 4 · Limited · Final report · May 31, 2022 · N27574 · Substantial damage
  > The flight crew not maintaining lateral control of the helicopter during hovering operation which resulted in a dynamic rollover.
- [NTSB GAA22WA099](https://openairdocs.org/ntsb/GAA22WA099.md): Hughes 369HS · Panama City, Panama · Incident · No injuries · Class 5 · Foreign · Feb 7, 2022 · N9113Q · Minor damage
- [NTSB ERA19WA176](https://openairdocs.org/ntsb/ERA19WA176.md): Bell 206 · La Vega, Dominican Republic · Accident · 2 fatal · Foreign investigation · May 21, 2019 · N9956K · Substantial damage
- [NTSB CEN18LA290](https://openairdocs.org/ntsb/CEN18LA290.md): Bell 206 · Todd Mission, TX · Accident · Minor injuries · Limited investigation · Final report · Jul 20, 2018 · N352CT · Substantial damage
  > The passenger’s inadvertent interference with the tail rotor pedals, which resulted in a loss of helicopter control during takeoff and the subsequent impact with terrain.
- [NTSB GAA16CA408](https://openairdocs.org/ntsb/GAA16CA408.md): Bell Helicopter Textron 206 · Modesto, CA · Accident · No injuries · Data collection · Final report · Jul 30, 2016 · N206LW · Substantial damage
  > The pilot's failure to maintain pitch control during an autorotation, which resulted in abnormal ground contact and main rotor contact with the tail boom. Contributing to the accident was the low fuel level which resulted in fuel starvation and a loss of…
- [NTSB ERA16CA160](https://openairdocs.org/ntsb/ERA16CA160.md): Bell 206 · Baltimore, MD · Accident · No injuries · Data collection · Final report · Apr 16, 2016 · N326AC · Destroyed
  > The pilot's inadequate compensation for the wind while hovering out of ground effect, which resulted in a loss of tail rotor effectiveness.
- [NTSB ERA16FA144](https://openairdocs.org/ntsb/ERA16FA144.md): Bell 206 · Pigeon Forge, TN · Accident · 5 fatal · Field investigation · Final report · Apr 4, 2016 · N16760 · Destroyed
  > An inflight loss of engine power due to a failure of the engine fuel pump, which resulted in a collision with trees and terrain during the subsequent autorotation. The failure of the engine fuel pump resulted from the absence of adequate grease leading to…
- [NTSB GAA16CA165](https://openairdocs.org/ntsb/GAA16CA165.md): Bell 206B · Hanford, CA · Accident · Minor injuries · Data collection · Final report · Mar 26, 2016 · N52Q · Substantial damage
  > The pilot's decision to release the collective while flying at 10 feet above ground level, resulting in the rapid helicopter descent and impact with terrain.
- [NTSB GAA15LA296](https://openairdocs.org/ntsb/GAA15LA296.md): Bell 206 · Ozark, AL · Accident · No injuries · Limited investigation · Final report · Sep 24, 2015 · N49660 · Substantial damage
  > The pilot's failure to maintain clearance from terrain while hovering, which resulted in the helicopter's skid impacting terrain, subsequent abnormal airframe vibrations, and a hard landing during the subsequent hovering autorotation.
- [NTSB WPR15LA257](https://openairdocs.org/ntsb/WPR15LA257.md): Hughes 369HS · Manra Island, Kiribati · Accident · 1 fatal · Limited investigation · Final report · Sep 3, 2015 · N9068F · Destroyed
  > A The loss of helicopter control for reasons that could not be determined asbecause the helicopter sank in the oceanwater and was not recovered.
- [NTSB ERA15FA178](https://openairdocs.org/ntsb/ERA15FA178.md): Hughes 369D · Cherokee, AL · Accident · 1 fatal · Field investigation · Final report · Apr 6, 2015 · N555JC · Substantial damage
  > The pilot's spatial disorientation during a low-level river crossing in rainy, gray, reduced visibility meteorological conditions, which resulted in the helicopter's subsequent descent and impact with the water. Contributing to the accident was the pilot's…
- [NTSB ERA15LA179](https://openairdocs.org/ntsb/ERA15LA179.md): Bell 206B · Taylors Island, MD · Accident · No injuries · Limited investigation · Final report · Mar 24, 2015 · N43CM · Substantial damage
  > A partial loss of engine power during cruise flight 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 ANC15CA012](https://openairdocs.org/ntsb/ANC15CA012.md): Bell 206B · Palmer, AK · Accident · No injuries · Data collection · Final report · Mar 10, 2015 · N86TA · Substantial damage
  > The pilot's failure to maintain control while hovering at a low altitude, which resulted in an impact with frozen lake ice. Contributing to the accident was the pilot's decision to operate the helicopter from the left seat contrary to the rotorcraft flight…
- [NTSB WPR14CA041](https://openairdocs.org/ntsb/WPR14CA041.md): Bell 206B · Superior, MT · Accident · No injuries · Data collection · Final report · Nov 2, 2013 · N888DR · Substantial damage
  > The pilot's failure to maintain aircraft control while maneuvering during a long-line operation.
- [NTSB WPR14CA052](https://openairdocs.org/ntsb/WPR14CA052.md): Bell 206B · Milo, OR · Accident · Serious injuries · Data collection · Final report · Oct 28, 2013 · N16673 · Substantial damage
  > The pilot's failure to see and avoid wires while maneuvering at a low-altitude, which resulted in the main rotor blades striking the wires.
- [NTSB WPR12LA022](https://openairdocs.org/ntsb/WPR12LA022.md): Mcdonnell Douglas 500D · Colusa, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 27, 2011 · N61PJ · Substantial damage
  > A total loss of engine power while maneuvering at low altitude for reasons that could not be determined because postaccident examinations did not reveal any anomalies that would have precluded normal operation. Contributing to the accident severity was the…
- [NTSB ERA12MA005](https://openairdocs.org/ntsb/ERA12MA005.md): Bell 206B · New York, NY · Accident · 2 fatal · Major investigation · Final report · Oct 4, 2011 · N63Q · Substantial damage
  > The pilot's failure to anticipate and correct for conditions (high gross weight, low indicated airspeed, and a right downwind turn) conducive to loss of tail rotor effectiveness (LTE), which resulted in LTE and an uncontrolled spin. Contributing to the…
- [NTSB WPR11TA274](https://openairdocs.org/ntsb/WPR11TA274.md): Bell 206B · Franklin, CA · Accident · No injuries · Final report · Jun 21, 2011 · N38EA · Substantial damage
  > The student pilot's failure to maintain rotor rpm during the practice autorotation.
- [NTSB WPR11CA243](https://openairdocs.org/ntsb/WPR11CA243.md): Bell 206B3 · Glendale, AZ · Accident · No injuries · Data collection · Final report · May 27, 2011 · N59383 · Substantial damage
  > The certified flight instructor's failure to maintain adequate main rotor RPM during the autorotation.
- [NTSB CEN11FA053](https://openairdocs.org/ntsb/CEN11FA053.md): Bell 206 · Meeker, CO · Accident · 1 fatal · Field investigation · Final report · Nov 3, 2010 · N8533F · Substantial damage
  > The pilot's failure to maintain clearance from electrical power lines during the low-altitude flight.
- [NTSB CEN11LA023](https://openairdocs.org/ntsb/CEN11LA023.md): Bell 206B · Newton, TX · Accident · Serious injuries · Limited investigation · Final report · Oct 13, 2010 · N499BH · Substantial damage
  > The pilot’s attempted takeoff with the fuel hose attached to the helicopter and the pilot and ground crew’s failure to accurately communicate.
- [NTSB CEN10FA509](https://openairdocs.org/ntsb/CEN10FA509.md): Bell Helicopter Textron 206L-1 · Walnut Grove, AR · Accident · 3 fatal · Field investigation · Final report · Aug 31, 2010 · N62AE · Substantial damage
  > The pilot’s loss of aircraft control, due to spatial disorientation, resulting in the in-flight separation of the main rotor and tail boom.
- [NTSB CEN10WA273](https://openairdocs.org/ntsb/CEN10WA273.md): Fairchild Hiller FH-1100 · Görkwitz, Germany · Accident · 4 fatal · Foreign investigation · May 23, 2010 · N8672 · Substantial damage
- [NTSB ERA09CA249](https://openairdocs.org/ntsb/ERA09CA249.md): Bell 206 · West Palm Beach, FL · Accident · No injuries · Data collection · Final report · Apr 17, 2009 · N25PM · Substantial damage
  > The pilot’s failure to maintain aircraft control during taxi, which resulted in a dynamic rollover.
- [NTSB WPR09LA144](https://openairdocs.org/ntsb/WPR09LA144.md): MD Helicopter 369D · Trona, CA · Accident · Minor injuries · Limited investigation · Final report · Mar 7, 2009 · N501EF · Substantial damage
  > The pilot's failure to maintain control while landing in a high density altitude environment due to a loss of tail rotor effectiveness.
- [NTSB SEA08TA188](https://openairdocs.org/ntsb/SEA08TA188.md): Hughes 369D · Bonners Ferry, ID · Accident · No injuries · Final report · Aug 18, 2008 · N622PB · Substantial damage
  > The pilot's inadequate preflight planning for the takeoff and the helicopter loading that exceeded the lift performance capability of the helicopter.
- [NTSB LAX08FA233](https://openairdocs.org/ntsb/LAX08FA233.md): Hughes 369D · Price, UT · Accident · 3 fatal · Field investigation · Final report · Jul 19, 2008 · N400BE · Destroyed
  > The pilot's inadequate preflight performance planning for the takeoff and the loading that exceeded the lift performance capability of the helicopter.
- [NTSB MIA08CA040](https://openairdocs.org/ntsb/MIA08CA040.md): Agusta A109 · ST. Augustine, FL · Accident · No injuries · Data collection · Final report · Dec 22, 2007 · N109SK · Substantial damage
  > The pilot's failure to maintain a visual lookout while taxiing.
- [NTSB SEA07CA258](https://openairdocs.org/ntsb/SEA07CA258.md): Bell 206-B2 · Rosamond, CA · Accident · Minor injuries · Data collection · Final report · Sep 11, 2007 · N205LT · Substantial damage
  > The pilot's inadequate compensation for gusting variable winds encountered after landing. Factors include gusting, suddenly shifting winds, and a hangar near the spot where the helicopter had landed.
- [NTSB ATL07LA079](https://openairdocs.org/ntsb/ATL07LA079.md): Hughes 369D · Whiteville, NC · Accident · Minor injuries · Limited investigation · Final report · Apr 24, 2007 · N11AS · Substantial damage
  > A partial loss of engine power due to fatigue fracture of the power turbine governor spring, causing a false pneumatic signal to the fuel control and a corresponding reduction in fuel flow.
- [NTSB ATL07CA076](https://openairdocs.org/ntsb/ATL07CA076.md): Bell 206-B · Sevierville, TN · Accident · No injuries · Data collection · Final report · Apr 22, 2007 · N219SH · Substantial damage
  > The pilot's improper use of the flight controls while at a hover that resulted in the tail colliding with the ground, a subsequent hard landing, and collapse of the skids.
- [NTSB NYC06LA062](https://openairdocs.org/ntsb/NYC06LA062.md): Bell 206B · Big Creek, KY · Accident · Serious injuries · Limited investigation · Final report · Feb 17, 2006 · N36HF · Substantial damage
  > The pilot's inadvertent settling with power during a descent. Contributing to the accident was mechanical turbulence in the lee of an obstruction in windy conditions.
- [NTSB LAX06IA011](https://openairdocs.org/ntsb/LAX06IA011.md): Hughes 369D · Kahului, HI · Incident · No injuries · Incident investigation · Final report · Oct 14, 2005 · N58267 · Minor damage
  > The fatigue cracking and failure of the tail rotor control rod during cruise flight, which resulted in a hard landing during the precautionary landing.
- [NTSB DEN05TA119](https://openairdocs.org/ntsb/DEN05TA119.md): Hughes 369HS · Albuquerque, NM · Accident · Serious injuries · Final report · Aug 6, 2005 · N500SD · Substantial damage
  > the bullet(s), which severed the helicopter's left tail rotor pedal. Contributing factors were the severed anti-torque pedal and the unsuitable terrain for landing.
- [NTSB NYC05FA099](https://openairdocs.org/ntsb/NYC05FA099.md): Bell 206L · New York, NY · Accident · Serious injuries · Field investigation · Final report · Jun 14, 2005 · N78TD · Substantial damage
  > The pilot's inadequate preflight planning, which resulted in an attempted takeoff with an overweight helicopter, and subsequent impact with a pier and water. Factors were a high ambient temperature and unfavorable winds.
- [NTSB DEN05LA056](https://openairdocs.org/ntsb/DEN05LA056.md): Hughes 369HS · Provo, UT · Accident · No injuries · Limited investigation · Final report · Feb 3, 2005 · N9118F · Substantial damage
  > the pilot's improper in-flight planning and decision making, his failure to maintain terrain clearance, and the total failure of the tail rotor drive shaft as a result of the tail rotor strike.
- [NTSB LAX04FA329](https://openairdocs.org/ntsb/LAX04FA329.md): Bell 206B · Kalaheo, HI · Accident · 5 fatal · Class 1 · Field · Final report · Sep 25, 2004 · N16849 · Destroyed
  > The pilot's decision to continue flight under visual flight rules into an area of turbulent, reduced visibility weather conditions, which resulted in the pilot's spatial disorientation and loss of control of the helicopter. Contributing to this accident was…
- [NTSB DEN04LA130](https://openairdocs.org/ntsb/DEN04LA130.md): Bell 206B3 · Atlantic City, WY · Accident · Serious injuries · Limited investigation · Final report · Aug 23, 2004 · N2751U · Substantial damage
  > the pilot's inability to maintain aircraft control, improper in-flight planning and decision making, and failure to compensate for wind conditions, resulting in collision with terrain. Contributing factors were the intentional low-level maneuver, and the wind…
- [NTSB LAX04LA281](https://openairdocs.org/ntsb/LAX04LA281.md): Bell 206B · Little Valley, CA · Accident · Serious injuries · Limited investigation · Final report · Jul 26, 2004 · N549W · Destroyed
  > the pilot's failure to maintain an adequate clearance from objects and terrain while maneuvering at low altitude. Factors in the accident were the high, rising terrain, and the high density altitude.
- [NTSB FTW04FA168](https://openairdocs.org/ntsb/FTW04FA168.md): Bell 206-L1 · Vermillion Bay, LA · Accident · 3 fatal · Field investigation · Final report · Jun 24, 2004 · N5006F · Destroyed
  > The pilot's continued flight into adverse weather conditions resulting in a loss of control. Contributing factors were the prevailing thunderstorms and the pilot's inadequate in flight preparation and planning.
- [NTSB SEA04LA090](https://openairdocs.org/ntsb/SEA04LA090.md): Bell 206B · Auburn, WA · Accident · No injuries · Limited investigation · Final report · May 23, 2004 · N206AF · Substantial damage
  > Loss of control for undetermined reasons.

Next page: https://openairdocs.org/engine/allison-250-ser-400hp/ntsb.md?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_aircrafts.parquet' a JOIN 'https://openairdocs.org/data/latest/ntsb_case_detail.parquet' c ON c."mKey" = a.case_mkey
WHERE a.engine_model_code IN ('03013', '03012')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/engine/allison-250-ser-400hp/ntsb

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