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Accidents · NTSB WPR15FA072 · Final report

Bell 206 accident near Benson, Arizona, January 1, 2015

On January 1, 2015, a 1992 Bell 206 (helicopter), registered N57AW, was destroyed in an accident during enroute near Benson, Arizona. It was a positioning flight under general aviation rules (Part 91). 2 people were killed. The weather was instrument conditions (cloud, fog or low visibility).

The NTSB's probable cause their words, unchanged

The pilot’s continued visual flight into instrument meteorological conditions which resulted in an inflight collision with terrain. Contributing to the accident was the pilot’s inadequate preflight planning, during which he failed to identify forecasted deteriorating weather conditions along the route of flight.

Source: NTSB aviation accident database, copy made October 5, 2026. Docket and reports at the NTSB.

What the record shows

Date
January 1, 2015
Place
Benson, Arizona · map
Type
Accident
Injuries
2 people were killed.
Weather
instrument conditions (cloud, fog or low visibility)
Aircraft
Bell 206 L4, built 1992 · all 206s on the register
Registration
N57AW · registry record · serial 52004
Damage
Destroyed
Flight
Positioning flight · general aviation rules (Part 91)

The NTSB's narrative final · quoted from the NTSB record

The helicopter was on a visual flight rules (VFR) repositioning flight in preparation for providing contracted air support capability to the local sheriff's office the next day. The operator reported that the helicopter did not arrive at the intended destination, and the wreckage was located 29 miles north of the intended destination. The helicopter was fragmented into multiple pieces along a 174-ft debris path. Ground scars and wreckage distribution were consistent with collision with terrain while in forward flight. The observations from a weather station located 3 miles east-southeast of the accident site indicated ceilings less than 500 ft and visibility less than 1 mile were likely at the time of the accident. The relative humidity had rapidly increased above 90 percent immediately before the accident, which would be indicative of cloud cover and mist at or near the surface. Witnesses living in the local area reported that the visibility at ground level was very limited, with low clouds and fog. Observations near the destination showed lowered visibility and low ceilings as the rain moved eastward through the accident area. Gusty winds ahead of the lowering ceilings would have likely created low-level wind shear. The operator's flight data monitoring system indicated that the helicopter was flying along an interstate about 300 ft above ground level (agl), which decreased to about 200 ft agl, likely as the visibility was reduced. However, the last recorded points indicated that the helicopter had climbed to about 500 ft agl, and was no longer tracking the interstate. It is likely that the VFR flight encountered instrument meteorological conditions, and the pilot was trying to maneuver to an area with greater visibility when the helicopter collided with terrain. Weather information available to the pilot before takeoff showed a cold front between the departure airport and destination, with forecasted low clouds, rain, ceilings below 600 ft, and gusty winds associated with that front. It was the pilot's responsibility to review the weather before all Part 91 flights; the chief pilot was not required to review the conditions with the pilot for such flights. Had the pilot conducted thorough preflight planning, he should have identified the deteriorating weather conditions and recognized that he could not complete the VFR flight.

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

  1. Controlled flight into terrain or object (CFIT) during enroute
  2. VFR encounter with IMC during enroute defining event

The NTSB's findings

  • cause Personnel issues › Action/decision › Info processing/decision › Decision making/judgment › Pilot
  • cause Personnel issues › Action/decision › Action › Incorrect action selection › Pilot
  • cause Environmental issues › Conditions/weather/phenomena › Ceiling/visibility/precip › Below VFR minima › Decision related to condition
  • cause Environmental issues › Conditions/weather/phenomena › Ceiling/visibility/precip › Low ceiling › Effect on operation
  • cause Environmental issues › Conditions/weather/phenomena › Ceiling/visibility/precip › Low visibility › Effect on operation
  • factor Personnel issues › Task performance › Planning/preparation › Weather planning › Pilot
  • Organizational issues › Support/oversight/monitoring › Oversight › Oversight of operation › Operator

Pilot

  • Certificate: flight instructor, commercial pilot, private
  • Ratings: single-engine land; instructor: helicopter; instrument: helicopter; rotorcraft: helicopter
  • Flight time: 1,413 hours in all; 195 in this make and model; 80.5 in the last 90 days; 37.5 in the last 30 days
  • Last flight review: October 15, 2014
  • Medical certificate: Class 2 (with waivers/limitations)
  • Seat: rgt
  • Injury: fatal

Pilot-Rated Passenger

  • Certificate: airline transport pilot
  • Ratings: multi-engine land; single-engine land; instructor: helicopter; instrument: airplane; instrument: helicopter; rotorcraft: helicopter
  • Flight time: 18,986 hours in all
  • Medical certificate: Class 1 (without waivers/limitations)
  • Seat: left
  • Injury: fatal

The aircraft

  • Airframe total time: 8,116.7 hours
  • Last inspection: 100-hour inspection, December 31, 2014; 1 hours since
  • Maximum gross weight: 4,550 lb
  • Seats: 5
  • Landing gear: fixed
  • Engine: Rolls-Royce 250 C30P (turboshaft); 13,539 hours total
  • Operator: N57Aw LLC

The flight

  • Departed from: KGEU Glendale AZ at 10:50 pm
  • Destination: KFHU Sierra Vista AZ
  • A second pilot was aboard

Weather at the time

  • Light: dusk
  • Visibility: 3 statute miles
  • Sky: broken clouds at 600 ft
  • Temperature: 43°F (6°C), dew point 39°F (4°C)
  • Altimeter: 29.95 inHg
  • Observation at 11:53 pm from KTUS, 29 miles away

Injuries

FatalSeriousMinorNone
Flight crew2

Documents from the investigation the NTSB's docket: the evidence folder behind the report

The docket, the folder of records gathered during an investigation (maintenance records, photographs, witness statements, examinations), has not been read from the NTSB for this case yet; the list appears here once it has. Open the docket at the NTSB.

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 never names anyone involved. A preliminary report can change; the final report usually follows one to two years later, and the page is refreshed when it does.