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NTSB Report
January 31, 1984 · Bell 47G-3B-1 · N90769
Ogden, UT
Overview
Report Status
Preliminary report
Event Type
Accident
Date
January 31, 1984
Injury Outcomes
No injuries (3 uninjured)
Location
Ogden, UT
Aircraft
Bell 47G-3B-1
Tail Number
N90769
Injuries
None
Aircraft Damage
Substantial
NTSB Number
DEN84LA079
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.
Full Narrative
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.
Flight
Event TypeAccident
Event Time17:10 MST
Nearest Airport0nm N
Runway0
Flight Plan FiledNone
Aircraft FireGrd
Aircraft ExplosionNo
Aircraft
AircraftBell 47G-3B-1
Tail NumberN90769
Aircraft CategoryHeli
DamageSubstantial
Operating RulePart 135
Engines1
Engine TypeReciprocating
Engine DetailsLycoming · TVO-435-B1A · Reciprocating · 270
Seats3
People & Injuries
Injury SummaryNo injuries (3 uninjured)
Fatal0
Serious0
Minor0
Uninjured3
Total3
Crew 1Age 42 · Second Class
Conditions
ConditionsIMC
LightDaylight
WindCalm
CeilingNone
Temperature / Dew Point19 C / 19 C
Altimeter30.00 inHg
Weather SourcePILO