# NTSB investigations: Allison 250-C30 series

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 2 of 3 · 104 cases

## Cases, newest first

- [NTSB DFW06IA151](https://openairdocs.org/ntsb/DFW06IA151.md): Bell 206L-1 · South Pass 57 (Gulf of Mexico) · Incident · Serious injuries · Incident investigation · Final report · Jun 6, 2006 · N272M · No damage
  > The passenger's failure to follow procedures associated with operations in the vicinity of the helicopter and his failure to see/avoid the tail rotor of the helicopter.
- [NTSB ANC06LA066](https://openairdocs.org/ntsb/ANC06LA066.md): Bell 206L-1 · Juneau, AK · Accident · Minor injuries · Limited investigation · Final report · Jun 1, 2006 · N45RP · Substantial damage
  > The pilot's failure to maintain adequate altitude/clearance from terrain while maneuvering in adverse weather conditions. Factors associated with the accident are the pilot's decision to continue flight into adverse weather, fog, whiteout and flat light…
- [NTSB DFW06IA145](https://openairdocs.org/ntsb/DFW06IA145.md): Bell 206L-3 · Grand Isle 43AA · Incident · 1 fatal · Incident investigation · Final report · May 30, 2006 · N92MT · No damage
  > The pilot's incapacitation and death due to pre-existing cardiac disease.
- [NTSB DFW06FA083](https://openairdocs.org/ntsb/DFW06FA083.md): Bell 206L-1 · Patterson, LA · Accident · 2 fatal · Field investigation · Final report · Mar 14, 2006 · N370RL · Destroyed
  > The improper installation of an engine fuel line fitting by other maintenance personnel, which resulted in a loose fitting and a loss of engine power during cruise flight. Factors associated with the accident are a tailwind, and the lack of a suitable site…
- [NTSB LAX06LA098](https://openairdocs.org/ntsb/LAX06LA098.md): Eurocopter AS350D · Kahului, HI · Accident · No injuries · Limited investigation · Final report · Jan 29, 2006 · N90Q · Substantial damage
  > A total loss of engine power due to the internal effects on the bearings consistent with an operating event of insufficient oil supply. Contributing to the accident was the pilot’s improper flare during the autorotative descent.
- [NTSB DFW06CA058](https://openairdocs.org/ntsb/DFW06CA058.md): Bell 206L-4 · Fort Worth, TX · Accident · No injuries · Data collection · Final report · Jan 25, 2006 · N225GH · Substantial damage
  > The flight instructors failure to maintain main rotor RPM and improper flare, which resulted in a hard landing.
- [NTSB DFW06FAMS1](https://openairdocs.org/ntsb/DFW06FAMS1.md): Bell 206-L3 · Gulf of Mexico · Accident · 3 fatal · Missing aircraft · Final report · Oct 6, 2005 · N6560K · Destroyed
  > Undetermined. The aircraft is missing.
- [NTSB DFW05MA230](https://openairdocs.org/ntsb/DFW05MA230.md): Sikorsky S76 · Gulf of Mexico, TX · Accident · Serious injuries · Major investigation · Final report · Sep 6, 2005 · N90421 · Destroyed
  > The pilots' delayed response to the No. 1 engine fire warning and the loss of power to both engines, which occurred for undetermined reasons. The pilots' delayed response was most likely due to stress and fatigue. Contributing to the delay of the initiation…
- [NTSB DFW05CA213](https://openairdocs.org/ntsb/DFW05CA213.md): Bell 206L · Gulf of Mexico · Accident · No injuries · Data collection · Final report · Aug 17, 2005 · N330P · Substantial damage
  > The pilot's failure to maintain clearance with a stationary object while landing.
- [NTSB CHI05CA156](https://openairdocs.org/ntsb/CHI05CA156.md): Bell 206L-3 · Algonac, MI · Accident · Minor injuries · Data collection · Final report · Jun 24, 2005 · N311JX · Substantial damage
  > The pilot not maintaining helicopter control, the loss of tail rotor effectiveness he encountered, and his not maintaining clearance from objects during the approach. Factor were the low altitude, the transmission lines, and the garage.
- [NTSB IAD05TA058](https://openairdocs.org/ntsb/IAD05TA058.md): Hughes 369FF · Quantico, VA · Accident · Minor injuries · Final report · Apr 27, 2005 · N5252Y · Substantial damage
  > The flight crew's failure to maintain adequate altitude/clearance from a building, which resulted in contact with the building, dynamic rollover, and collision with terrain.
- [NTSB DFW05LA074](https://openairdocs.org/ntsb/DFW05LA074.md): Bell 206L-3 · Cameron, LA · Accident · No injuries · Limited investigation · Final report · Feb 18, 2005 · N512RA · Substantial damage
  > Fuel starvation due to a blocked and collapsed fuel nozzle screen, resulting from a contaminated fuel source/facility. Factors were the inadequate maintenance/inspection of fuel sources, and the lack of suitable terrain (high sea state) for the forced landing…
- [NTSB LAX04CA268](https://openairdocs.org/ntsb/LAX04CA268.md): McDonnell Douglas 369FF · Lihue, HI · Accident · No injuries · Data collection · Final report · Jul 16, 2004 · N530RL · Substantial damage
  > The pilot misjudging the clearance between the tree and the main rotor blades. Contributing factors to the accident were the high workload of the pilot and his lack of experience with bambi bucket operations.
- [NTSB LAX04LA216](https://openairdocs.org/ntsb/LAX04LA216.md): Bell 206L-3 · Palmdale, CA · Accident · Minor injuries · Limited investigation · Final report · May 20, 2004 · N2019F · Substantial damage
  > The momentary loss of engine power for undetermined reasons.
- [NTSB FTW04LA088](https://openairdocs.org/ntsb/FTW04LA088.md): Bell 206L-3 · W. Cameron 149 · Accident · Minor injuries · Limited investigation · Final report · Mar 6, 2004 · N81SP · Substantial damage
  > A partial loss of engine power due to undetermined reasons. A contributing factor was the emergency floats not being deployed.
- [NTSB FTW04FA007](https://openairdocs.org/ntsb/FTW04FA007.md): Bell 206L-3 · W. Cameron 509 · Accident · 3 fatal · Field investigation · Final report · Oct 10, 2003 · N81671 · Destroyed
  > The pilot's loss of control following an inadvertent encounter with adverse weather conditions. Contributing factors were the prevailing thunderstorms, the low ceilings, and the miscommunication between the pilot and the company's communication center in…
- [NTSB DEN02LA101](https://openairdocs.org/ntsb/DEN02LA101.md): Bell 206L-III · Canon City, CO · Accident · Serious injuries · Limited investigation · Final report · Aug 30, 2002 · N43GA · Destroyed
  > the pilot's failure to maintain clearance of a static wire, and the subsequent loss of aircraft control due to the main rotor pitch change tubes being severed.
- [NTSB NYC02LA083](https://openairdocs.org/ntsb/NYC02LA083.md): Bell 206-L3 · New York, NY · Accident · No injuries · Limited investigation · Final report · Apr 13, 2002 · N19TD · Substantial damage
  > The pilot's improper flare while landing, which resulted in a collision with a concrete curb.
- [NTSB FTW02LA064](https://openairdocs.org/ntsb/FTW02LA064.md): Bell 206L-3 · Grand Isle 74 · Accident · No injuries · Limited investigation · Final report · Jan 8, 2002 · N349AL · Substantial damage
  > The pilot's misjudged landing flare. A contributing factor was the fatigue fracture of the PC air line due to the improper installation by company maintenance personnel, which resulted in a loss of engine power.
- [NTSB FTW02LA019](https://openairdocs.org/ntsb/FTW02LA019.md): Bell 206L-3 · East Cameron 78 · Accident · Serious injuries · Limited investigation · Final report · Oct 18, 2001 · N348AL · Substantial damage
  > The hard landing due to the pilot's failure to maintain proper main rotor rpm. Contributing factors were the loss of engine power for undetermined reasons, and the pilot's failure to deploy the emergency floats.
- [NTSB LAX01LA292](https://openairdocs.org/ntsb/LAX01LA292.md): Bell 206-L4 · Mesa, AZ · Accident · No injuries · Limited investigation · Final report · Aug 28, 2001 · N995PM · Substantial damage
  > The pilot's improper autorotation in that he failed to attain the proper descent rate resulting in a hard landing and subsequent airframe damage. A factor was the high temperature.
- [NTSB FTW01LA195](https://openairdocs.org/ntsb/FTW01LA195.md): Bell 206L-3 · Cameron, LA · Accident · Serious injuries · Limited investigation · Final report · Aug 24, 2001 · N350AL · Destroyed
  > fuel contamination due to the combination of DIEGME, water, and bacterial growth, which resulted in formation of an apple-jelly type material that blocked the fuel nozzle screen and led to a loss of engine power.
- [NTSB FTW01LA176](https://openairdocs.org/ntsb/FTW01LA176.md): Sikorsky SK-76A · New Iberia, LA · Accident · No injuries · Limited investigation · Final report · Jul 10, 2001 · N164AG · Substantial damage
  > the loss of control while maneuvering for undetermined reasons.
- [NTSB LAX01LA157](https://openairdocs.org/ntsb/LAX01LA157.md): Bell 206-L3 · Willcox, AZ · Accident · No injuries · Limited investigation · Final report · Apr 23, 2001 · N215M · Substantial damage
  > A loss of engine power due to the likely unporting of the fuel tank pickups as the helicopter was maneuvered to look at animals on the ground. Also causal was the pilot's misjudged touchdown point during an autorotational approach, which resulted in the…
- [NTSB FTW01IA061](https://openairdocs.org/ntsb/FTW01IA061.md): Bell 206-L3 · Wc 368 · Incident · No injuries · Incident investigation · Final report · Jan 8, 2001 · N142DP · Minor damage
  > fuel exhaustion during approach due to the pilot's failure to refuel.
- [NTSB FTW01LA004](https://openairdocs.org/ntsb/FTW01LA004.md): Bell 206-L1 · Jasper, TX · Accident · Serious injuries · Limited investigation · Final report · Oct 2, 2000 · N321CA · Substantial damage
  > The pilot's inadvertent VFR flight into instrument meteorological conditions, which resulted in his failure to maintain control of the helicopter. Factors were the fog and the pilot's lack of instrument flight experience.
- [NTSB SEA00TA182](https://openairdocs.org/ntsb/SEA00TA182.md): Bell 206-L4 · Atlanta, ID · Accident · No injuries · Final report · Sep 21, 2000 · N3310 · Substantial damage
  > The pilot's failure to maintain clearance from an object. Trees and inadequate ground communications were a factor.
- [NTSB FTW00LA137](https://openairdocs.org/ntsb/FTW00LA137.md): Bell 206L3 · Salt Marsh · Accident · No injuries · Limited investigation · Final report · Apr 29, 2000 · N17237 · Substantial damage
  > The company mechanic's failure to replace the bolt's cotter key properly and the subsequent loss of the nut, which then resulted in the tail rotor control disconnection and the pilot's inability to maintain aircraft control.
- [NTSB LAX00FA160](https://openairdocs.org/ntsb/LAX00FA160.md): Bell 206L-3 · Grand Canyon, AZ · Accident · Serious injuries · Field investigation · Final report · Apr 18, 2000 · N2267N · Destroyed
  > A snow ingestion caused loss of engine power due to the pilot's inadequate preflight inspection and failure to remove the accumulated snow from the engine inlet area. Also causal was the pilot's failure to maintain main rotor rpm while maneuvering to avoid…
- [NTSB SEA00LA020](https://openairdocs.org/ntsb/SEA00LA020.md): Bell 206L-1 · Neihart, MT · Accident · No injuries · Limited investigation · Final report · Nov 17, 1999 · N519EH · Substantial damage
  > Clearance from an object was not maintained. Gusting wind conditions was a factor.
- [NTSB LAX00LA024](https://openairdocs.org/ntsb/LAX00LA024.md): Bell 206-L4 · Santa Clarita, CA · Accident · No injuries · Limited investigation · Final report · Oct 23, 1999 · N36R · Substantial damage
  > The pilot's delay in adding power during a power-on recovery from an autorotation, which resulted in a hard landing and rollover. The flight instructor's inadequate supervision of the flight was also causal.
- [NTSB FTW99LA240](https://openairdocs.org/ntsb/FTW99LA240.md): Bell 206-L3 · Main Pass 225a · Accident · Serious injuries · Limited investigation · Final report · Aug 26, 1999 · N6610E · Substantial damage
  > The pilot's failure to maintain directional control of the helicopter. A factor was the tailwind condition.
- [NTSB FTW99LA077](https://openairdocs.org/ntsb/FTW99LA077.md): Bell 206L-3 · West Delta 105b · Accident · No injuries · Limited investigation · Final report · Feb 1, 1999 · N6603X · Substantial damage
  > The pilot's failure to maintain clearance with the oil platform's windsock on final approach to landing.
- [NTSB FTW98TA328](https://openairdocs.org/ntsb/FTW98TA328.md): Bell 206L-3 · Reklaw, TX · Accident · Minor injuries · Final report · Jul 24, 1998 · N42489 · Substantial damage
  > The pilot's failure to maintain proper alignment in that the external load was not centered during sling operation, which resulted in entanglement of the load with the landing gear, and the loss of aircraft control.
- [NTSB FTW97LA356](https://openairdocs.org/ntsb/FTW97LA356.md): Sikorsky S-76A · Patterson, LA · Accident · Serious injuries · Limited investigation · Final report · Sep 22, 1997 · N517AL · Substantial damage
  > failure of the copilot to maintain a positive rate of climb after takeoff, which led to an inadvertent descent and collision with a crop of sugar cane and the ground. Factors relating to the accident were: darkness, fog, and the pilot-in-command's inadequate…
- [NTSB FTW97LA217](https://openairdocs.org/ntsb/FTW97LA217.md): Bell 206L-3 · Weston, CO · Accident · No injuries · Limited investigation · Final report · Jun 12, 1997 · N207DS · Substantial damage
  > the pilot's improper in-flight planning/decision and failure to maintain adequate altitude and/or clearance from rising mountainous/hilly terrain. The unfavorable wind condition and low airspeed were related factors.
- [NTSB CHI97FA149](https://openairdocs.org/ntsb/CHI97FA149.md): Bell 206L3 · Boise, ID · Accident · No injuries · Field investigation · Final report · May 27, 1997 · N35CH · Substantial damage
  > the improper torque meter installation by maintenance personnel, attempting flight with known discrepancies by the pilot-in-command and the check airman, and an improper autorotation by the pilot-in-command with improper oversight of the autorotation maneuver…
- [NTSB FTW97LA016](https://openairdocs.org/ntsb/FTW97LA016.md): Bell 206L-3 · Venice, LA · Accident · No injuries · Limited investigation · Final report · Oct 14, 1996 · N21497 · Substantial damage
  > a loss of engine power due to frogs being ingested into the engine as a result of the pilots failure to perform a thorough preflight, and the pilot's improper touchdown technique.
- [NTSB FTW94FA274](https://openairdocs.org/ntsb/FTW94FA274.md): Bell 230 · Albert Lea, MN · Accident · No injuries · Field investigation · Final report · Aug 19, 1994 · N230EM · Substantial damage
  > The pilot's failure to execute the proper approach and the ensuing settling with power. Factors were the tailwind, and the congestion around the airport.
- [NTSB BFO94FA135](https://openairdocs.org/ntsb/BFO94FA135.md): Bell 206L-4 · Whiting, NJ · Accident · 3 fatal · Field investigation · Final report · Aug 13, 1994 · N124NH · Destroyed
  > The pilot's improper in-flight planning/decision, flight into instrument meteorological conditions (IMC), and subsequent spatial disorientation, which resulted in loss of aircraft control. Factors related to the accident were: darkness, the adverse weather…
- [NTSB FTW94GA232](https://openairdocs.org/ntsb/FTW94GA232.md): Bell 206L-3 · Mimbres, NM · Accident · 3 fatal · Final report · Jul 12, 1994 · N3178B · Destroyed
  > The pilot's improper decision to attempt to hover out of ground effect under adverse conditions while exceeding the maximum allowable weight for that maneuver. Factors in the accident were: high density altitude and the tailwind.
- [NTSB SEA94LA073](https://openairdocs.org/ntsb/SEA94LA073.md): Bell 206 L-1 · Salt Lake City, UT · Accident · Minor injuries · Limited investigation · Final report · Feb 26, 1994 · N2752U · Substantial damage
  > The pilot's selection of unsuitable terrain for a landing site. Factors include snow covered terrain.
- [NTSB FTW94LA071](https://openairdocs.org/ntsb/FTW94LA071.md): Bell 206L-3 · Cascade, CO · Accident · No injuries · Limited investigation · Final report · Jan 20, 1994 · N3211K · Substantial damage
  > The pilot's improper in-flight planning which resulted in the aircraft's yaw performance being exceeded. A factor was the high density altitude.
- [NTSB FTW92LA166](https://openairdocs.org/ntsb/FTW92LA166.md): Bell 206L-3 · Ponca City, OK · Accident · No injuries · Limited investigation · Final report · Jun 21, 1992 · N66LR · Substantial damage
  > The pilot's failure to maintain main rotor RPM. A factor was the contaminated fuel.
- [NTSB LAX92LA254](https://openairdocs.org/ntsb/LAX92LA254.md): Bell 206-L3 · Waikoloa, HI · Accident · Minor injuries · Limited investigation · Final report · Jun 19, 1992 · N2267N · Substantial damage
  > Failure of the rear landing gear cross tube due to corrosion.
- [NTSB LAX92T#A04](https://openairdocs.org/ntsb/LAX92T%23A04.md): Bell 206L-1 · Fort Irwin, CA · Accident · No injuries · Class 3 · Final report · Apr 20, 1992 · N5736N · Substantial damage
- [NTSB DEN89MA130](https://openairdocs.org/ntsb/DEN89MA130.md): Bell 206L-3 · Big Timber, MT · Accident · 4 fatal · Major investigation · Final report · Jun 2, 1989 · N76KM · Destroyed
  > Failure of the pilot to maintain control of the aircraft during takeoff, due to spatial disorientation, which resulted in a collision with the terrain. Contributing factors were: dark night, pilot's visual perception, inadequate initial training of the pilot…
- [NTSB NYC86IA109](https://openairdocs.org/ntsb/NYC86IA109.md): Sikorsky S-76 · Atlantic City, NJ · Incident · No injuries · Incident investigation · Final report · Mar 20, 1986 · N38 · Minor damage
  > During a preflight examination of a Sikorsky S76 the instructor and student discovered a hole in the leading edge of the pylon above the intermediate gear box and scuff mark on the main rotor blade caps. The instructor and student had just completed a 2.1 hr…
- [NTSB NYC85FA145](https://openairdocs.org/ntsb/NYC85FA145.md): Sikorsky S76A · Belmar, NJ · Accident · 1 fatal · Field investigation · Final report · Jun 11, 1985 · N176FJ · 2 aircraft · Substantial damage
  > During takeoff & landing practice for a pre-solo plt the CFI saw a helicopter, N176FJ, approaching the arpt. N4956B, at the time of 1st sighting, was on a left base for rwy 3. The rotorcraft apparently did not see N4956B or hear any radio calls at this…
- [NTSB FTW85LA119](https://openairdocs.org/ntsb/FTW85LA119.md): Sikorsky S-76A · Houma, LA · Accident · Minor injuries · Limited investigation · Final report · Feb 19, 1985 · N31223 · Destroyed
  > The aircrew had just completed a medivac flt & were repositioning the helicopter to the home base. While they were en route, the company dispatcher informed the crew that fog was moving into the area & that they had better hurry. During the night apch, the…

Next page: https://openairdocs.org/ntsb.md?engine=03015&page=3

## 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 ('03015'))
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/ntsb?engine=03015&page=2

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.