# NTSB investigations: Allison 250 SER 400HP 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 5 · 231 cases ## Cases, newest first - [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 FTW04IA043](https://openairdocs.org/ntsb/FTW04IA043.md): Bell 206B · Venice, LA · Incident · No injuries · Incident investigation · Final report · Nov 25, 2003 · N125TA · Minor damage > The failure of the forward boost pump while in cruise flight while operating with less than 10 gallons of fuel onboard, which resulted in a loss of engine power. A factor was the inoperative forward fuel boost pump caution light switch. - [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 LAX03FA241](https://openairdocs.org/ntsb/LAX03FA241.md): Bell 206B · Waialeale,Kauai, HI · Accident · 5 fatal · Field investigation · Final report · Jul 23, 2003 · N37741 · Destroyed > The pilot's failure to maintain adequate terrain clearance/altitude while descending over mountainous terrain, and his continued flight into adverse weather. Factors contributing to the accident were clouds and a low ceiling. - [NTSB NYC03LA133](https://openairdocs.org/ntsb/NYC03LA133.md): MBB BO-105C · Buffalo, NY · Accident · Serious injuries · Limited investigation · Final report · Jun 20, 2003 · N105SJ · Substantial damage > The pilot's improper interpretation of a descent as a power loss and subsequent decision to autorotate, which resulted in a hard landing. A factor in the accident was the collective friction. - [NTSB CHI03LA062](https://openairdocs.org/ntsb/CHI03LA062.md): Bell 206L-1 · West Plains, MO · Accident · No injuries · Limited investigation · Final report · Jan 31, 2003 · N27AE · Substantial damage > The excessive descent rate that required an abrupt flare, resulting in the main rotor severing the tailboom. - [NTSB ANC03LA015](https://openairdocs.org/ntsb/ANC03LA015.md): Bell 206B · Kingman, AZ · Accident · 1 fatal · Limited investigation · Final report · Nov 15, 2002 · N16962 · Substantial damage > The pilot's failure to maintain altitude/clearance from obstacles during cruise flight, which resulted in the helicopter striking a transmission line, and subsequently the ground. - [NTSB SEA02LA172](https://openairdocs.org/ntsb/SEA02LA172.md): Hughes 500 · Carnation, WA · Accident · No injuries · Limited investigation · Final report · Sep 10, 2002 · N9263F · Substantial damage > The pilot's delayed power application during a practice power recovery autorotation. - [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 LAX01LA243](https://openairdocs.org/ntsb/LAX01LA243.md): Bell 206B · San Francisco, CA · Accident · No injuries · Limited investigation · Final report · Jul 12, 2001 · N474SF · Substantial damage > The failure of the accessory gearbox 2 1/2 bearing in fatigue resulting in the complete loss of engine power and a subsequent forced landing. The pilot's failure to maintain directional control during the autorotational flare maneuver is also causal. The… - [NTSB SEA01FA085](https://openairdocs.org/ntsb/SEA01FA085.md): MBB BO-105C · Medford, OR · Accident · No injuries · Field investigation · Final report · May 5, 2001 · N105RH · Destroyed > A leaking engine oil outlet line fitting in the #1 engine compartment, resulting in an oil fire in the engine compartment. - [NTSB IAD01LA041](https://openairdocs.org/ntsb/IAD01LA041.md): Bell BH-206-B · Ringgold, VA · Accident · Minor injuries · Limited investigation · Final report · Apr 8, 2001 · N17HA · Substantial damage > pilot's failure to properly control the helicopter during a slope landing, which resulted in a dynamic rollover. - [NTSB DEN01LA012](https://openairdocs.org/ntsb/DEN01LA012.md): Bell 206L-1 · Mesa Verde, CO · Accident · No injuries · Limited investigation · Final report · Oct 30, 2000 · N613 · Substantial damage > The manufacturer's use of improper materials, and inadequate quality control of the tail rotor blades during the manufacturing process, which resulted in fatigue failure of the blade. - [NTSB ANC00LA053](https://openairdocs.org/ntsb/ANC00LA053.md): Bell 206B · Homer, AK · Accident · No injuries · Limited investigation · Final report · May 1, 2000 · N301MH · Substantial damage > The pilot's misjudging the landing flare in whiteout/flat light conditions. Factors associated with the accident are the whiteout and flat lighting conditions. - [NTSB LAX00LA103](https://openairdocs.org/ntsb/LAX00LA103.md): Hughes 369HS · Pacific Ocean (Pacific Ocean) · Accident · No injuries · Limited investigation · Final report · Feb 14, 2000 · N717ST · Destroyed > An unknown mechanical malfunction that resulted in a precautionary landing at sea and the subsequent sinking of the helicopter by an ocean swell. - [NTSB FTW00RA039](https://openairdocs.org/ntsb/FTW00RA039.md): Bell 206-L1 · Cabinda, Angola · Accident · 1 fatal · Foreign investigation · Dec 1, 1999 · N5005B - [NTSB LAX99LA293](https://openairdocs.org/ntsb/LAX99LA293.md): Bell 206B · Delhi, CA · Accident · No injuries · Limited investigation · Final report · Sep 1, 1999 · N59551 · Substantial damage > The loss of engine power due to the pilot's inadequate preflight, which failed to detect water contamination of the fuel system. The operator's inadequate maintenance of the loose fitting fuel cap and the deformed filler opening, which allowed water to leak… - [NTSB ANC99TA090](https://openairdocs.org/ntsb/ANC99TA090.md): Bell 206B · Deadhorse, AK · Accident · No injuries · Final report · Jul 8, 1999 · N47122 · Substantial damage > A failure of the pilot-in-command to perform an adequate preflight inspection, and remove a rotor blade tie-down strap. - [NTSB SEA99LA082](https://openairdocs.org/ntsb/SEA99LA082.md): Hughes 369D · Southbend, WA · Accident · Minor injuries · Limited investigation · Final report · Jun 8, 1999 · N8306F · Substantial damage > The complete loss of power, due to a failure of the compressor impeller disk. Factors include the low altitude of the helicopter at the time of the power loss, and the need to autorotate in a confined area. - [NTSB ANC98TA125](https://openairdocs.org/ntsb/ANC98TA125.md): Bell 206B II · Chickaloon, AK · Accident · No injuries · Final report · Aug 15, 1998 · N70711 · Substantial damage > A fracture of the main rotor drag pin assembly. - [NTSB LAX98LA139](https://openairdocs.org/ntsb/LAX98LA139.md): Bell 206B · Grand Canyon, AZ · Accident · No injuries · Limited investigation · Final report · Apr 20, 1998 · N8533F · Substantial damage > The malfunction and erratic speed control of the engine's governor, and the flight instructor's delayed remedial action. - [NTSB FTW98LA187](https://openairdocs.org/ntsb/FTW98LA187.md): Bell 206B · Cameron, LA · Accident · No injuries · Limited investigation · Final report · Apr 17, 1998 · N59604 · Substantial damage > The loss of engine power for undetermined reasons and the pilot's improper flare which resulted in a hard landing. - [NTSB MIA98LA070](https://openairdocs.org/ntsb/MIA98LA070.md): Bell 206B · Miami, FL · Accident · No injuries · Limited investigation · Final report · Feb 3, 1998 · N26EA · Substantial damage > The pilot's improper use of flight controls (cyclic) while attempting a takeoff to a hover, which led to an on-ground loss of control (dynamic rollover). - [NTSB LAX98LA053](https://openairdocs.org/ntsb/LAX98LA053.md): McDonnell Douglas 369HS · Saipan, India · Accident · Minor injuries · Limited investigation · Final report · Dec 6, 1997 · N9068F · Destroyed > The failure of the maintenance facility to comply with the service bulletins, which resulted in the development of a corrosion pit, subsequent leakage and failure of the acceleration bellows of the fuel control. - [NTSB ANC98TA011](https://openairdocs.org/ntsb/ANC98TA011.md): Bell 206B · Anchorage, AK · Accident · No injuries · Final report · Dec 5, 1997 · N83146 · Substantial damage > The pilot's failure to maintain adequate rotor RPM during an autorotation landing. - [NTSB ANC98LA003](https://openairdocs.org/ntsb/ANC98LA003.md): Bell 206-B2 · Sutton, AK · Accident · No injuries · Limited investigation · Final report · Oct 15, 1997 · N86TA · Substantial damage > The pilot's failure to maintain clearance between the tail rotor and the external long line cable, and the subsequent entanglement of the tail rotor with the long line. - [NTSB IAD98FA005](https://openairdocs.org/ntsb/IAD98FA005.md): Bell 206B · Sago, WV · Accident · 4 fatal · Field investigation · Final report · Oct 12, 1997 · N911RH · Destroyed > The improper overhaul of the turbine governor by the manufacturer, which resulted in the loss of power. - [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 LAX97LA317](https://openairdocs.org/ntsb/LAX97LA317.md): Bell 206B · Napa, CA · Accident · Minor injuries · Limited investigation · Final report · Sep 8, 1997 · N770GG · Substantial damage > Failure of the pilot to perform an adequate preflight, which resulted in him failing to notice and release the tie down chains. - [NTSB SEA97LA118](https://openairdocs.org/ntsb/SEA97LA118.md): Hughes 369D · Moclips, WA · Accident · No injuries · Limited investigation · Final report · May 21, 1997 · N8306F · Substantial damage > Inadequate installation of the fuel control by company maintenance personnel and a loose nut on a line. A disconnected Pc line was a factor. - [NTSB IAD97FA032](https://openairdocs.org/ntsb/IAD97FA032.md): Mbb BO-105CBS · Penn Yan, NY · Accident · 3 fatal · Field investigation · Final report · Dec 13, 1996 · N90750 · Destroyed > the pilot's failure to maintain altitude/clearance from the terrain. Factors relating to the accident were: the pilot's diverted attention to the GPS, darkness, low ceiling, rising terrain, and high wind condition. - [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 LAX96LA346](https://openairdocs.org/ntsb/LAX96LA346.md): Bell 206B · Fillmore, CA · Accident · No injuries · Limited investigation · Final report · Sep 30, 1996 · N59576 · Substantial damage > the flight instructor's inadequate supervision and delay in taking remedial action to stop the aircraft's lateral movement, which resulted in a dynamic rollover after touchdown. - [NTSB SEA96LA205](https://openairdocs.org/ntsb/SEA96LA205.md): Bell 206B · Greybull, WY · Accident · No injuries · Limited investigation · Final report · Aug 23, 1996 · N206FT · Substantial damage > the pilot's misjudged recovery (remedial action) from a simulated autorotation demonstration. - [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 ANC96LA111](https://openairdocs.org/ntsb/ANC96LA111.md): McDonnell Douglas MD369D · Healy, AK · Accident · Minor injuries · Limited investigation · Final report · Aug 4, 1996 · N58269 · 2 aircraft · No damage > The inadequate visual outlook by the pilots of both aircraft, and their failure to see and avoid the other aircraft. A factor associated with the accident was sunglare affecting the helicopter pilot's vision. - [NTSB ANC96LA097](https://openairdocs.org/ntsb/ANC96LA097.md): Bell 206B · Juneau, AK · Accident · No injuries · Limited investigation · Final report · Jul 8, 1996 · N2761F · Substantial damage > The pilot's failure to maintain proper alignment while lifting the helicopter to a hover and inducing a dynamic roll to avoid striking a passenger. - [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 SEA96LA025](https://openairdocs.org/ntsb/SEA96LA025.md): Hughes 369D · Scotts Mills, OR · Accident · Minor injuries · Limited investigation · Final report · Nov 29, 1995 · N64DB · Substantial damage > The pilot's failure to maintain adequate clearance from the ground. - [NTSB FTW96LA054](https://openairdocs.org/ntsb/FTW96LA054.md): Hughes 369HS · Leakey, TX · Accident · Minor injuries · Limited investigation · Final report · Nov 27, 1995 · N8312F · Substantial damage > improper planning/decision by the pilot, by failing to ensure there was adequate fuel on board, which resulted in fuel exhaustion and a subsequent roll-over during a forced landing on hilly terrain. A factor relating to the accident was: downsloping terrain… - [NTSB LAX96LA009](https://openairdocs.org/ntsb/LAX96LA009.md): Hughes 369HS · Hana, HI · Accident · Minor injuries · Limited investigation · Final report · Oct 12, 1995 · N9205F · Substantial damage > the loss of engine power due to inadequate maintenance inspection of the fuel system which permitted air to enter the engine fuel supply. A factor in the accident was the pilot's improper execution of the autorotation landing. - [NTSB ANC95LA112](https://openairdocs.org/ntsb/ANC95LA112.md): Bell 206B-3 · Bettles, AK · Accident · No injuries · Limited investigation · Final report · Jul 21, 1995 · N58129 · Substantial damage > Failure of the pilot to ensuring the sling cable was free of the skid before lifting off into a hover, which allowed the cable to become wrapped (entangled) around the skid. - [NTSB LAX95LA052](https://openairdocs.org/ntsb/LAX95LA052.md): Bell 206B · Julian, CA · Accident · No injuries · Limited investigation · Final report · Dec 15, 1994 · N37AJ · Substantial damage > the failure of the pilot to maintain a proper alignment during hover in a mountainous area. - [NTSB ANC94LA110](https://openairdocs.org/ntsb/ANC94LA110.md): Bell B-206 · Gustavus, AK · Accident · No injuries · Limited investigation · Final report · Aug 31, 1994 · N382EH · Substantial damage > The pilot misjudged his distance/altitude from the landing area, and his lack of recent night flying experience. Factors which contributed to the accident were: the pilot's failure to assure that he would be landing with sufficient light, and the dusk/dark… - [NTSB CHI94LA161](https://openairdocs.org/ntsb/CHI94LA161.md): Bell 206B · Winnebago, IL · Accident · No injuries · Limited investigation · Final report · May 12, 1994 · N49585 · Substantial damage > a wire strike due to failure to maintain proper altitude, and improper visual lookout by the pilot-in-command. - [NTSB CHI94GA038](https://openairdocs.org/ntsb/CHI94GA038.md): Hughes 369HS · Antonia, MO · Accident · 1 fatal · Final report · Nov 19, 1993 · N9179F · Substantial damage > The pilot's failure to maintain proper altitude. A factor was the dark night. - [NTSB ANC93T#A05](https://openairdocs.org/ntsb/ANC93T%23A05.md): Bell BH-206B · Kantishna, AK · Incident · No injuries · Class 3 · Final report · Aug 17, 1993 · N59387 · Minor damage - [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. Next page: https://openairdocs.org/ntsb.md?engine=03013&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 ('03013', '03012')) ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC ``` This list as a web page: https://openairdocs.org/ntsb?engine=03013&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.