Bell 206B-III accident near Tooele, Utah, March 1, 2011
On March 1, 2011 at about 3:30 pm local time, a Bell 206B-III (helicopter), registered N206BY, was substantially damaged in an accident during maneuvering (hover) near Tooele, Utah (Tooele Valley airport). It was an other work-use flight under general aviation rules (Part 91). No one was hurt; 2 people were on board or involved. The weather was visual conditions (good weather).
The NTSB's probable cause their words, unchanged
The pilot did not maintain yaw control of the helicopter during a maneuvering hover. Contributing to the accident was the pilot’s lack of experience in the make and model helicopter.
Source: NTSB aviation accident database, copy made November 2, 2026. Docket and reports at the NTSB.
What the record shows
- Date
- March 1, 2011 · about 3:30 pm local time · cases in 2011
- Place
- Tooele, Utah · Tooele Valley · cases near this airport · map
- Type
- Accident
- Injuries
- No one was hurt; 2 people were on board or involved.
- Weather
- visual conditions (good weather)
- Aircraft
- Bell 206B-III · all 206B-IIIs on the register
- Registration
- N206BY · no longer on the register · serial 2871
- Damage
- Substantial damage
- Flight
- Other work-use flight · general aviation rules (Part 91)
The NTSB's narrative final · quoted from the NTSB record
While accompanying a pilot who was developing further proficiency in helicopter long-line external load operations, the accident pilot, who had a total time of 1.5 hours in the make and model helicopter that was being flown, was offered the opportunity to fly an external load circuit. During the circuit, which was the pilot's first long-line experience in that make and model helicopter, the helicopter suddenly began to yaw to the right as it approached the point where the load was going to be placed on the ground. The pilot at the controls was unable to arrest the yaw, and during his attempt to regain control of the helicopter, it descended into the terrain. A postaccident examination of the helicopter found no evidence of any anomaly or malfunction that would have contributed to a loss of control of the helicopter.
The complete narrative as the NTSB published it. The NTSB's docket holds the report as a PDF and any photographs, statements and other documents from the investigation.
The factual record from the NTSB's investigation tables, in plain English
What happened, in order
- Loss of control in flight during maneuvering (hover) defining event
The NTSB's findings
- cause Aircraft › Aircraft oper/perf/capability › Performance/control parameters › Yaw control › Not attained/maintained
- cause Personnel issues › Action/decision › Action › Incorrect action performance › Pilot
- factor Personnel issues › Experience/knowledge › Experience/qualifications › Total experience w/ equipment › Pilot
- cause Personnel issues › Task performance › Use of equip/info › Aircraft control › Pilot
Pilot
- Certificate: airline transport pilot, flight instructor
- Ratings: multi-engine land; single-engine land; instructor: airplane single-engine; instructor: helicopter; instrument: airplane; instrument: helicopter; rotorcraft: helicopter
- Flight time: 7,760 hours in all; 2 in this make and model; 75 in the last 90 days; 6 in the last 30 days; 6,831 as pilot in command; 95 on instruments
- Last flight review: December 28, 2010
- Medical certificate: Class 2 (without waivers/limitations)
- Seat: left
- Injury: no injuries
Pilot
- Certificate: flight instructor, commercial pilot
- Ratings: instructor: helicopter; instrument: helicopter; rotorcraft: helicopter
- Flight time: 1,779 hours in all; 85 in this make and model; 135 in the last 90 days; 105 in the last 30 days; 1,688 as pilot in command; 1,450 on instruments
- Last flight review: February 28, 2011
- Medical certificate: Class 2 (without waivers/limitations)
- Seat: rgt
- Injury: no injuries
The aircraft
- Airframe total time: 11,939 hours
- Last inspection: 100-hour inspection, February 17, 2011
- Maximum gross weight: 3,350 lb
- Seats: 5
- Landing gear: fixed
- Engine: Allison 250-C20 SER (turboshaft); 0 hours total
- Operator: Upper Limit Aviation
The flight
- Departed from: KSLC Salt Lake City at 2:33 pm
- Destination: KTVY Tooele UT
- A second pilot was aboard
Weather at the time
- Light: daylight
- Wind: from 170° at 3 knots
- Visibility: 10 statute miles
- Sky: clear at 20,000 ft
- Temperature: 27°F (-3°C), dew point 0°F (-18°C)
- Altimeter: 30.20 inHg
Injuries
| Fatal | Serious | Minor | None | |
|---|---|---|---|---|
| Flight crew | 2 |
Documents from the investigation the NTSB's docket: the evidence folder behind the report
4 documents, released by the NTSB on March 22, 2012. View them here, or download them; the NTSB redacts some personal details before release, and this site shows the NTSB's own titles rather than its file names.
| # | Document | What it is | |
|---|---|---|---|
| 1 | Pilot/operator Aircraft Accident Report, NTSB Form 6120.1 | PDF, 9 pages | View Download |
| 2 | Record of Conversation (Pilots) | PDF, 1 page | View Download |
| 3 | Bell Investigation Summary | PDF, 4 pages | View Download |
| 4 | Release of Aircraft Wreckage, NTSB Form 6120.15 | PDF, 1 page | View Download |
The same docket at the NTSB · documents without a copy here are fetched from the NTSB when you open them.
Connections how this case links to the rest of the register
- N206BY: not on the register today · the record of its deregistration
- Bell 206 JetRanger and LongRanger 1,453 registered today · the model family and its accident history
- Bell 3,079 aircraft on the register
- Engine: Allison 250-C20 SER 530 aircraft carry this series today · as the NTSB recorded it
- Bolinder Fld/Tooele Valley Airport · nearest airport
- Salt Lake City International · departed from
- Accidents and incidents in Utah 1,440 since 1982 · 264 in the last ten years
- Utah 8,355 aircraft registered
The whole map of how records connect · these connections as data: /graph/accident/WPR11LA151.json.
The bigger picture in Aviation Analytics: accidents over time since 1982, by model, by phase of flight and conditions, by place and on the map.
Everything on this page comes from the NTSB's public records. The narrative, probable cause and findings are the NTSB's own words; the coded tables behind the report are written out in plain English, with pilots' ages, home towns and medical details left out. The documents and photographs are the NTSB's docket, shown as the NTSB released them. This site's own text does not name anyone involved, its policy at this time. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.