- Date
- January 30, 1984, 17:10 local (Jan 31, 1984, 00:10 UTC)
- Place
- Ogden, UT
- Injuries
- 3 uninjured
- Damage
- Substantial damage
- Phase of flight
- Enroute
- Aircraft
- N90769Bell 47G-3B-1
- Weather
- Instrument (IMC) · Day
- Status
- Completed
- Report
- Approved by Office Director
- FAA report
- 19840130002939A
- Case key
- 16328
From the NTSB’s public API. By law, NTSB reports can’t be used as evidence in lawsuits over the accident.
On this page
Sequence of events
NTSB’s coding before 2008: each occurrence and phase of flight, and the causes and factors under it. The codes are defined in NTSB’s coding manual.
Analysis
The plt took off from a mountainous work site to return to salt lake city, UT. The wx was clear at the work site (elevation 6700 ft), but there was fog below. After encountering the fog, the plt hovered with a slow forward speed over snow covered terrain. A passenger said that where rocks protruded thru the snow, they provide a reference, then suddenly there were no rocks. As the helicopter proceeded over an open area, the plt lost ground recerences. He said he may have experienced vertigo because he thought he was about on the ground when the helicopter hit & rolled over. The elevation at the crash site was about 5000 ft.
Aircraft
- Registration
- N90769
- Reported as
- Bell 47G-3B-1
- Category
- Helicopter
- Serial number
- 2901
- Airframe hours
- 4,829
- Engine
- Lycoming TVO-435-B1A, 270 horsepower, reciprocating
- Damage
- Substantial damage
- Fire
- On-Ground
- Flight
- Part 135
- Registered owner
- Didericksen
- Airworthiness certificate
- Standard, Normal
- Departed
- Near Ogden, UT
Matched to the registry by N-number and the event date; the registry’s history has gaps, so older matches can be wrong. Compare the reported make and model.
Flight crew
As NTSB recorded them. NTSB leaves out names.
- Role
- Pilot
- Age
- 42
- Certificate
- Airline transport
- Airplane ratings
- Single-engine land
- Instrument ratings
- Helicopter
- Medical
- Class 2, Valid Medical--w/ waivers/lim
- Seat
- Left
- Flight hours
- 5,204 total · 1,350 in this make and model · 4,776 as pilot in command · 153 in the last 90 days · 58 in the last 30 days
Weather
- Conditions
- Instrument (IMC) · Day
- Wind
- Calm
- Temperature
- 19 °F, dew point 19 °F
- Altimeter
- 30.00 inHg
FAA reports on this event · 1
The FAA’s own accident and incident reports, matched to the aircraft by N-number and date.
Other investigations on N90769 · 2
Matched to the same aircraft by N-number and date.