# NTSB investigations: Bell UH-1B

A list on [Bell UH-1B](https://openairdocs.org/model/bell-uh-1b.md).

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

Page 1 of 2 · 58 investigations

- [NTSB WPR23LA118](https://openairdocs.org/ntsb/WPR23LA118.md): Bell UH-1B · Orland, CA · Accident · No injuries · Class 4 · Limited · Final report · Mar 2, 2023 · N234SJ · Substantial damage
  > The pilot’s inadequate fuel planning, which resulted in fuel exhaustion and a loss of engine power.
- [NTSB ANC22FA047](https://openairdocs.org/ntsb/ANC22FA047.md): Bell UH1B · Clear, AK · Accident · 1 fatal · Class 3 · Field · Final report · Jun 27, 2022 · N9970F · Destroyed
  > A loss of control for reasons that could not be determined based on the available information.
- [NTSB ERA22FA279](https://openairdocs.org/ntsb/ERA22FA279.md): Bell UH-1B · Amherstdale, WV · Accident · 6 fatal · Class 1 · Field · Final report · Jun 22, 2022 · N98F · Destroyed
  > the operator’s failure to adequately inspect the former military turbine powered helicopter, which allowed an engine issue to progress and result in a loss of engine power and a subsequent loss of control after the helicopter struck powerlines during a forced…
- [NTSB GAA17CA355](https://openairdocs.org/ntsb/GAA17CA355.md): Bell UH1B · Williams, CA · Accident · No injuries · Data collection · Final report · Jun 21, 2017 · N6180A · Substantial damage
  > The pilot’s failure to maintain clearance from transmission wires while maneuvering at a low altitude during an agricultural application flight.
- [NTSB WPR16LA104](https://openairdocs.org/ntsb/WPR16LA104.md): Bell UH 1B · Maxwell, CA · Accident · No injuries · Limited investigation · Final report · May 7, 2016 · N486SA · Substantial damage
  > A reduction in available engine power during takeoff due to a stuck hot air valve, which resulted in low rotor rpm and a forced landing. Contributing to the accident was the lack of dry film lubricant and the presence of corrosion on the hot air valve…
- [NTSB WPR15LA159](https://openairdocs.org/ntsb/WPR15LA159.md): Garlick UH-1B · Kettle Falls, WA · Accident · Minor injuries · Limited investigation · Final report · May 8, 2015 · N46969 · Substantial damage
  > A total loss of engine power due to foreign object (towel) ingestion. Contributing to the accident was maintenance personnel’s inadequate postmaintenance inspection of the engine.
- [NTSB WPR13FA411](https://openairdocs.org/ntsb/WPR13FA411.md): Bell UH 1B · Detroit, OR · Accident · 1 fatal · Field investigation · Final report · Sep 16, 2013 · N204UH · Substantial damage
  > The fatigue failure of the upper two tailboom attachment points, which resulted in the tailboom separating from the fuselage during logging operations. Contributing to the accident was poor maintenance throughout the helicopter’s operational life.
- [NTSB CEN09LA565](https://openairdocs.org/ntsb/CEN09LA565.md): Bell UH-1B · Arvilla, ND · Accident · Serious injuries · Limited investigation · Final report · Sep 6, 2009 · N204JB · Substantial damage
  > The aircraft owner/mechanic/pilot's installation of an improper tail boom assembly and the resulting fatigue failure of the tail boom's attach fittings.
- [NTSB WPR09LA241](https://openairdocs.org/ntsb/WPR09LA241.md): Rotorcraft Development UH-1B · Richvale, CA · Accident · Serious injuries · Limited investigation · Final report · May 13, 2009 · N843M · Substantial damage
  > The pilot's failure to maintain control of the helicopter during takeoff for undetermined reasons.
- [NTSB SEA08LA043](https://openairdocs.org/ntsb/SEA08LA043.md): Bell UH-1B · Ennis, MT · Accident · No injuries · Limited investigation · Final report · Dec 5, 2007 · N46969 · Substantial damage
  > The loss of collective control friction during takeoff that resulted in a collective bounce oscillation. Contributing to the accident was the pilot's failure to maintain aircraft control during the aborted takeoff and the snow covered terrain.
- [NTSB SEA07LA154](https://openairdocs.org/ntsb/SEA07LA154.md): Bell UH-1B · Biggs, CA · Accident · No injuries · Limited investigation · Final report · Jun 12, 2007 · N2087S · Substantial damage
  > Loss of control during hover for undetermined reasons.
- [NTSB FTW04WA173](https://openairdocs.org/ntsb/FTW04WA173.md): Bell UH-1B · Las Bocas, Mexico · Accident · No injuries · Foreign investigation · Jun 12, 2004 · N64CC · Substantial damage
- [NTSB LAX04LA015](https://openairdocs.org/ntsb/LAX04LA015.md): Bell UH-1B · Durham, CA · Accident · No injuries · Limited investigation · Final report · Oct 16, 2003 · N234SJ · Substantial damage
  > Separation of the power turbine shaft retaining bolt resulting in extensive power turbine area damage and a loss of shaft output power.
- [NTSB MIA02LA133](https://openairdocs.org/ntsb/MIA02LA133.md): Bell UH-1B · Lorida, FL · Accident · Serious injuries · Limited investigation · Final report · Jul 16, 2002 · N91281 · Substantial damage
  > The pilot's continued operation with known engine anomalies resulting in loss of engine power due to failure of the engine fuel control pump drive clutch assembly due to wear and collision with the terrain during the resultant descent.
- [NTSB LAX00LA239](https://openairdocs.org/ntsb/LAX00LA239.md): Bell UH-1B · Arbuckle, CA · Accident · 1 fatal · Limited investigation · Final report · Jun 23, 2000 · N807SB · Destroyed
  > the partial failure of the tail rotor pitch change control rod that resulted in an attempted run-on landing in dark night conditions.
- [NTSB LAX99LA283](https://openairdocs.org/ntsb/LAX99LA283.md): Bell UH-1B · Lost Hills, CA · Accident · No injuries · Limited investigation · Final report · Aug 25, 1999 · N999SJ · Substantial damage
  > Failure and separation of the 90-degree gearbox as a result of the disengagement of the pinion and gear teeth. The cause(s) of the pinion and gear disengagement were undetermined.
- [NTSB FTW99WA109](https://openairdocs.org/ntsb/FTW99WA109.md): Bell UH1-B · Mexico City, Mexico · Accident · No injuries · Foreign investigation · Apr 5, 1999 · N64CC · 2 aircraft · Substantial damage
- [NTSB FTW99WA109](https://openairdocs.org/ntsb/FTW99WA109.md): Bell UH1-B · Mexico City, Mexico · Accident · No injuries · Foreign investigation · Apr 5, 1999 · N123SJ · 2 aircraft · Destroyed
- [NTSB LAX98LA108](https://openairdocs.org/ntsb/LAX98LA108.md): Bell UH-1B · Hollister, CA · Accident · Serious injuries · Limited investigation · Final report · Mar 7, 1998 · N204DR · Destroyed
  > The failure of the maintenance personnel to recognize and repair the chafed area of the tail rotor driveshaft, which resulted in an in-flight separation of the tail fin and hub assembly.
- [NTSB SEA97LA198](https://openairdocs.org/ntsb/SEA97LA198.md): Garlick UH-1B · Dayville, OR · Accident · Serious injuries · Limited investigation · Final report · Aug 29, 1997 · N22753 · Substantial damage
  > Improper installation of the transmission door by a company mechanic, resulting in inflight separation of the door (which then struck the tail rotor system) and consequent total loss of the tail rotor. Contributing to the accident were: inadequate…
- [NTSB SEA97FA196](https://openairdocs.org/ntsb/SEA97FA196.md): Southern Aero UH-1B · Skykomish, WA · Accident · 1 fatal · Field investigation · Final report · Aug 27, 1997 · N896W · Substantial damage
  > A fatigue fracture in the main rotor mast, which resulted in an in flight separation of the main rotor from the helicopter. Contributing to the accident was insufficient Federal Aviation Administration airworthiness standards and requirements for the aircraft.
- [NTSB LAX97LA206](https://openairdocs.org/ntsb/LAX97LA206.md): Bell UH-1B · Heron, CA · Accident · No injuries · Limited investigation · Final report · Jun 11, 1997 · N888SJ · Destroyed
  > partial loss of engine power for undetermined reasons. A factor relating to the accident was that the engine lost power when the helicopter was outside (below) the limits of the height/velocity curve.
- [NTSB MIA97LA099](https://openairdocs.org/ntsb/MIA97LA099.md): Bell UH-1B · Labelle, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 11, 1997 · N70696 · Destroyed
  > Company maintenance personnel's failure to properly evaluate a main rotor system problem resulting in main rotor straps with multiple laminates separated due to fatigue cracking being allowed to continue in service until failure and separation of a main rotor…
- [NTSB ATL97LA002](https://openairdocs.org/ntsb/ATL97LA002.md): Bell UH-IB · Bennettsville, SC · Accident · Serious injuries · Limited investigation · Final report · Oct 12, 1996 · N846MC · Destroyed
  > the pilot's improper planning/decision, which resulted in fuel exhaustion and loss of engine power due to an inadequate supply of usable fuel. A factor relating to the accident was: an inoperative left boost pump, which increased the amount of unusable fuel…
- [NTSB MIA96LA166](https://openairdocs.org/ntsb/MIA96LA166.md): Bell UH-1B · Lorida, FL · Accident · Minor injuries · Limited investigation · Final report · Jun 28, 1996 · N9846F · Substantial damage
  > failure of company maintenance personnel to properly torque the tail rotor 90 degree gear box mounting bolts during installation, which resulted in failure of the mounting studs due to bending fatigue and subsequent separation of the gearbox.
- [NTSB ATL94LA180](https://openairdocs.org/ntsb/ATL94LA180.md): Bell UH-1B · Ozark, AL · Accident · Minor injuries · Limited investigation · Final report · Sep 29, 1994 · N41870 · Substantial damage
  > The failure of the engines' main bearings because of a lack of lubrication. A factor was the heavily wooded terrain.
- [NTSB BFO94LA159](https://openairdocs.org/ntsb/BFO94LA159.md): Bell UH-1B · Carrabasset, ME · Accident · No injuries · Limited investigation · Final report · Aug 31, 1994 · N204JB · Substantial damage
  > Fracture failure of the tail rotor drive intermediate gearbox.
- [NTSB SEA94LA183](https://openairdocs.org/ntsb/SEA94LA183.md): Bell UH-1B · Pilot Rock, OR · Accident · Serious injuries · Limited investigation · Final report · Jul 17, 1994 · N9645A · Substantial damage
  > Directional control was not maintained for undetermined reasons.
- [NTSB SEA93LA207](https://openairdocs.org/ntsb/SEA93LA207.md): Bell UH-1B · Pierce, ID · Accident · No injuries · Limited investigation · Final report · Sep 23, 1993 · N3979C · Substantial damage
  > Separation of the 90 degree gearbox after fatigue failure of the gearbox attach bolts. Factors include hilly/mountainous terrain.
- [NTSB BFO91DOA01](https://openairdocs.org/ntsb/BFO91DOA01.md): Bell UH-1B · Iaeger, WV · Accident · Minor injuries · Final report · Jul 1, 1991 · N91348 · Substantial damage
  > The loss of engine power for undetermined reasons, while operating over unsuitable terrain.
- [NTSB ATL91LA102](https://openairdocs.org/ntsb/ATL91LA102.md): Bell UH-1B · Lake Seminole, GA · Accident · Serious injuries · Limited investigation · Final report · May 29, 1991 · N9650N · Destroyed
  > The failure of the pilot to maintain clearance from the surface.
- [NTSB ANC91LA058](https://openairdocs.org/ntsb/ANC91LA058.md): Bell UH-1B · Dog Fish Bay, AK · Accident · 1 fatal · Limited investigation · Final report · May 21, 1991 · N87966 · Destroyed
  > The pilot's exceeding the gross weight of the aircraft and inadequate supervision by company management. Contributing to the accident was the high vegetation.
- [NTSB MIA91LA113](https://openairdocs.org/ntsb/MIA91LA113.md): Bell UH-1B · Vero Beach, FL · Accident · Minor injuries · Limited investigation · Final report · Mar 12, 1991 · N9687R · Substantial damage
  > Improper maintenance adjustment by company maintenance personnel resulting in overtorque of a tailboom attach bolt which allowed the tailboom to shift. This disengaged the tail rotor drive shaft at a coupling resulting in the loss of tail rotor drive.
- [NTSB LAX90DXQ04](https://openairdocs.org/ntsb/LAX90DXQ04.md): Bell UH-1B · Bieber, CA · Accident · Serious injuries · Final report · Aug 14, 1990 · N64789 · Substantial damage
  > The pilot's failure to maintain aircraft control when intentionally slowing his aircraft to off load water on fire. Contributing to the accident was the pilot's failure to arm and release the external load.
- [NTSB SEA90TL#03](https://openairdocs.org/ntsb/SEA90TL%2303.md): Bell UH-1B · Yakima, WA · Accident · No injuries · Class 3 · Final report · Jun 21, 1990 · N99634 · Substantial damage
- [NTSB MKC90DCQ02](https://openairdocs.org/ntsb/MKC90DCQ02.md): Bell UH-1B · Ulysses, KS · Accident · 1 fatal · Final report · May 6, 1990 · N8142W · Destroyed
  > The pilot failed to maintain proper rotor RPM, while maneuvering over a high obstruction (power line) at the end of a swath run, which resulted in an inadvertent descent & collision with the terrain. The high obstruction was considered to be a related factor.
- [NTSB ATL89DKG06](https://openairdocs.org/ntsb/ATL89DKG06.md): Bell UH-1B · Plains, GA · Accident · 2 fatal · Final report · Sep 29, 1989 · N840MC · Destroyed
  > Improper modification of the helicopter by the company/operator, and failure of the spray boom, which resulted in mast bumping, and subsequent failure of the main rotor assembly.
- [NTSB LAX88DVA02](https://openairdocs.org/ntsb/LAX88DVA02.md): Bell UH-1B · Arvin, CA · Accident · Minor injuries · Final report · Mar 14, 1988 · N59368 · Destroyed
- [NTSB ATL87LA121](https://openairdocs.org/ntsb/ATL87LA121.md): Bell UH-1B · Bay Minette, AL · Accident · No injuries · Limited investigation · Final report · Apr 21, 1987 · N88987 · Destroyed
  > During a logging operation, the helicopter experienced a complete engine failure shortly after attempting a pickup. The pilot entered an autorotative glide. The helicopter impacted the water and sank. The wreckage examination disclosed that the compressor…
- [NTSB LAX86FVA10](https://openairdocs.org/ntsb/LAX86FVA10.md): Bell UH-1B · Le Grand, CA · Accident · Serious injuries · Final report · Jun 30, 1986 · N64789 · Substantial damage
  > The helicopter experienced an engine failure shortly after lift-off prior to a spray run on a nearby field. The engine decelerated to zero and the acft collided with the ground. Examination of the engine revealed the turbine rotor was destroyed and evidence…
- [NTSB LAX86DVA06](https://openairdocs.org/ntsb/LAX86DVA06.md): Bell UH-1B · Chowchilla, CA · Accident · Minor injuries · Final report · Apr 16, 1986 · N910PD · Destroyed
  > While returning from a spraying operation the plt observed that the main transmission oil pressure gage indicated zero. The plt reported that the engine master caution did not illuminate and that the oil temperature gage was normal. The plt stated that he…
- [NTSB MIA86LA138](https://openairdocs.org/ntsb/MIA86LA138.md): Bell UH-1B · North Port, FL · Accident · No injuries · Limited investigation · Final report · Apr 14, 1986 · N4242T · Substantial damage
  > The flt experienced an eng failure at an alt of aprx 8 ft AGL shortly after takeoff and the helicopter sustained substantial damage when a hard landing was made. Post accident inspection of the eng revealed the pwr turbine wheel experienced a loss of two…
- [NTSB FTW85FA310](https://openairdocs.org/ntsb/FTW85FA310.md): Bell UH-1B · Saint James, LA · Accident · 1 fatal · Field investigation · Final report · Aug 8, 1985 · N1385W · Destroyed
  > Acft was at a 150' hover preparing to pick up a log when it experienced a power loss. Witnesses stated that they heard a loud 'bang' and the pilot radioed 'get out of the way'. Acft autorotated thru 60' to 80' trees with very low rotor RPM and impacted with…
- [NTSB SEA85LA151](https://openairdocs.org/ntsb/SEA85LA151.md): Bell UH-1B · Hoquiam, WA · Accident · 1 fatal · Limited investigation · Final report · Jun 25, 1985 · N4991D · No damage
  > The helicopter was being used during an external load operation to move large blocks of wood. However, while hovering, the sling broke. Subsequently, a block of wood struck a company employee on the head while he was working on the ground. The employee was…
- [NTSB SEA85FA134](https://openairdocs.org/ntsb/SEA85FA134.md): Bell UH-1B · Juneau, AK · Accident · 1 fatal · Field investigation · Final report · Jun 11, 1985 · N99676 · Destroyed
  > While engaged in a log slinging operation over mountainous, densely forested terrain the rotor craft suffered a total power loss forcing the pilot to execute an autorotative landing into high conifer trees. Disassembly of the engine revealed evidence that the…
- [NTSB LAX85LA105](https://openairdocs.org/ntsb/LAX85LA105.md): Bell 204 · Snelling, CA · Accident · No injuries · Limited investigation · Final report · Jan 11, 1985 · N99021 · Substantial damage
  > Plt vacated the acft with engine at idle & with the blades turning to refuel. The landing platform mounted on the 'nurse' truck was slippery from an oil & copper mixture used in the spraying operation. The helicopter started to slide & the plt reboarded just…
- [NTSB ATL84LA226](https://openairdocs.org/ntsb/ATL84LA226.md): Bell 204 UH 1B · Tams, WV · Accident · No injuries · Limited investigation · Final report · Jul 20, 1984 · N91307 · Destroyed
  > An over gross takeoff was attempted from a 500 ft long zone. Translational lift was not achieved and rotor RPM deteriorated. The helicopter collided with trees, crashed & burned. The plt stated that the wind may have shifted during his takeoff.
- [NTSB LAX84LA273](https://openairdocs.org/ntsb/LAX84LA273.md): Bell UH-1B · Salinas, CA · Accident · Minor injuries · Limited investigation · Final report · Apr 29, 1984 · N57HP · Destroyed
  > While spraying a field of artichokes, the plt had made 1 pass southbound & started another northbound. He began the swath run by descending over power lines, then tried to climb & clear rising terrain beyond the lines. However, the helicopter continued…
- [NTSB SEA83FA133](https://openairdocs.org/ntsb/SEA83FA133.md): Garlick UH-1B/204 · Fossil, OR · Accident · Minor injuries · Field investigation · Final report · Jun 24, 1983 · N5598G · Destroyed
  > The helicopter collided with a dead tree and crashed while conducting a spray run on an aerial application mission. The pilot said that the dawn light conditions made the obtacle hard to see. In the attempt to clear the tree the spray boom made contact and…
- [NTSB LAX83LA022](https://openairdocs.org/ntsb/LAX83LA022.md): Bell UH-1B · Delano, CA · Accident · Minor injuries · Limited investigation · Final report · Oct 28, 1982 · N15FC · Destroyed
  > The pilot was making a helicopter spray run and decended into trees on th irst pass after reloading. He got a low RPM light in a reduced power situation. No malfunctions were found. The pilot had made 34 similiar operations during this schedule.

Next page: https://openairdocs.org/model/bell-uh-1b/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.aircraft_model_code IN ('1181410')
ORDER BY c."eventDate" DESC, c."ntsbNumber" DESC
```

This list as a web page: https://openairdocs.org/model/bell-uh-1b/ntsb

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