# NTSB investigations: Allison 250 SER 400HP: Loss of control - in flight 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. ## Latest cases - [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 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 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. - [NTSB NYC04LA039](https://openairdocs.org/ntsb/NYC04LA039.md): Bell 206B · Cranston, RI · Accident · Minor injuries · Limited investigation · Final report · Nov 26, 2003 · N90013 · Substantial damage > The pilot's inadvertent encounter with loss of tail rotor effectiveness. A factor was the wind change. - [NTSB LAX03CA279](https://openairdocs.org/ntsb/LAX03CA279.md): Bell 206B · Long Beach, CA · Accident · No injuries · Data collection · Final report · Sep 6, 2003 · N59506 · Substantial damage > the pilot's inadequate remedial action in response to a loss of tail rotor effectiveness. - [NTSB FTW01LA172](https://openairdocs.org/ntsb/FTW01LA172.md): Bell 206-L1 · Wc 173 · Accident · Serious injuries · Limited investigation · Final report · Aug 5, 2001 · N2755N · Substantial damage > the pilot's failure to maintain yaw control of the helicopter during approach. - [NTSB IAD01FA089](https://openairdocs.org/ntsb/IAD01FA089.md): Bell 206B · Baltimore, MD · Accident · 2 fatal · Field investigation · Final report · Aug 1, 2001 · N89FB · Destroyed > The pilot's improper decision to maneuver in an environment conducive to a loss of tail rotor effectiveness, and his inadequate recovery from the resultant unanticipated right yaw. - [NTSB FTW97LA364](https://openairdocs.org/ntsb/FTW97LA364.md): Bell 206B2 · Anahuac, TX · Accident · Serious injuries · Limited investigation · Final report · Sep 25, 1997 · N59396 · Destroyed > the pilot's inability to maintain control of the helicopter after encountering a dynamic rollover due to entanglement of the external load cable with the left landing gear skid. - [NTSB LAX97LA030](https://openairdocs.org/ntsb/LAX97LA030.md): Bell 206B · Supai, AZ · Accident · Minor injuries · Limited investigation · Final report · Nov 1, 1996 · N90144 · Destroyed > improper routing of the external cargo hoist cable (over helicopter skid), which resulted in lateral imbalance and roll-over of the helicopter, as weight on the cable became effective. - [NTSB NYC96LA167](https://openairdocs.org/ntsb/NYC96LA167.md): Bell 206B · Starks, ME · Accident · No injuries · Limited investigation · Final report · Aug 13, 1996 · N9913K · Substantial damage > the pilot's improper decision to operate at slow airspeed, and close to the critical relative wind azimuth area in gusty, variable winds, which resulted in an inadvertent loss of tail rotor effectiveness. The gusty crosswind and lack of a suitable terrain for… - [NTSB LAX96FA076](https://openairdocs.org/ntsb/LAX96FA076.md): Hughes 369D · Feather Falls, CA · Accident · 1 fatal · Field investigation · Final report · Dec 20, 1995 · N8395F · Destroyed > the pilot's failure to jettison his external load after it came in contact with trees and terrain. The pilot's failure to maintain altitude/clearance above trees and hilly terrain was a related factor. - [NTSB ATL93FA127](https://openairdocs.org/ntsb/ATL93FA127.md): Hughes 369HS · Talladega, AL · Accident · 1 fatal · Field investigation · Final report · Jul 12, 1993 · N9116F · Substantial damage > The pilot's poor in-flight decision to land downwind in a confined area that was surrounded by high obstructions, and his failure to properly compensate for the tailwind condition. A factor related to the accident was: the pilot's lack of total experience in… - [NTSB LAX93LA258](https://openairdocs.org/ntsb/LAX93LA258.md): Bell 206B3 · Stoneyford, CA · Accident · No injuries · Limited investigation · Final report · Jun 17, 1993 · N38EA · Substantial damage > the pilot's inadequate compensation for the existing wind conditions during a hover operation. A factor in the accident was the high density altitude and the gusting, variable wind conditions. - [NTSB FTW90LA172](https://openairdocs.org/ntsb/FTW90LA172.md): Bell B206BIII · Cameron, LA · Accident · Minor injuries · Limited investigation · Final report · Aug 30, 1990 · N59558 · Substantial damage > The pilot's failure to jettison the external load. - [NTSB LAX88LA203](https://openairdocs.org/ntsb/LAX88LA203.md): Bell 206B · Honolulu, HI · Accident · Minor injuries · Limited investigation · Final report · May 30, 1988 · N83203 · Destroyed > During a sightseeing flt, just after take off, the helicopter began to spin to the right, the plt tried to correct the situation by applying left rudder. The helicopter continued to spin. The plt reduced the throttle and adjusted the collective. The spin… - [NTSB LAX88LA059](https://openairdocs.org/ntsb/LAX88LA059.md): Hughes 369HS · Lihue, Kauai, HI · Accident · Serious injuries · Limited investigation · Final report · Nov 26, 1987 · N77DJ · Substantial damage > Pilot failure to maintain adequate main rotor RPM. - [NTSB LAX87LA179](https://openairdocs.org/ntsb/LAX87LA179.md): Bell 206B-II · Yucaipa, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 16, 1987 · N76EF · Destroyed > A Bell 206B went out of control and crashed while lndg at a 5,720 ft high helipad. The plt indicated that he terminated the aprch at a 8-10 ft hover and began to spin to the right with full left pedal applied. After 1 1/2 to 2 turns the plt atmptd to fly out… - [NTSB FTW86LA130](https://openairdocs.org/ntsb/FTW86LA130.md): Bell 206B · Conroe, TX · Accident · Serious injuries · Limited investigation · Final report · Jul 15, 1986 · N352AT · Substantial damage > The pilot reported that he lost tail rotor control during the transition part of the takeoff. As the helicopter rotated to the right, the pilot reduced power and pulled in collective before impact. Examination of the tail rotor showed no evidence of any tail… - [NTSB LAX86FJA02](https://openairdocs.org/ntsb/LAX86FJA02.md): Bell 206B · Pacific Ocean (Pacific Ocean) · Accident · 1 fatal · Final report · Jul 7, 1986 · N4835A · Destroyed > The plt was attempting to take off from the deck of a tuna boat when it contacted the side of the boat and sank in the Ocean. Post accident inspection revealed one of two nose tiedown straps had not been removed from the helicopter prior to the takeoff. The… - [NTSB FTW86LA041](https://openairdocs.org/ntsb/FTW86LA041.md): Hughes 369D · New Boston, TX · Accident · Minor injuries · Limited investigation · Final report · Mar 7, 1986 · N58420 · Substantial damage > The pilot experienced a tail rotor drive shaft flexible coupling failure when he pulled collective pitch to come to a hover before landing. The helicopter entered an uncontrollable right spin. During his haste to get the helicopter on the ground the pilot… - [NTSB NYC85FA245](https://openairdocs.org/ntsb/NYC85FA245.md): Bell 206B · Chalkhill, PA · Accident · 1 fatal · Field investigation · Final report · Sep 22, 1985 · N32TV · Destroyed > The helicopter was being used on an external load operation with a 100 ft cable attached. When a 618 lb load was ready to be moved, the plt started the eng, lifted off & moved the helicopter to a hover over the load. The loaders hooked the load to the cable &… ## 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 ('03013', '03012') AND EXISTS (SELECT 1 FROM 'https://openairdocs.org/data/latest/ntsb_occurrences.parquet' o WHERE o.case_mkey = x.case_mkey AND o.aircrafts_position = x.position AND o."occurrenceNumber" = 1 AND o."occurrenceCode" = 250)) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=03013&occurrence=250 --- 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.