N992SM

Substantial
None

Bell 206B S/N: 4181

Accident Details

Date
Saturday, October 3, 1998
NTSB Number
DEN99LA002
Location
VERNAL, UT
Event ID
20001211X11236
Coordinates
40.550643, -109.569869
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
2
Total Aboard
2

Probable Cause and Findings

Loss of tail rotor effectiveness. A factor was the quartering tailwind.

Aircraft Information

Registration
N992SM
Make
BELL
Serial Number
4181
Engine Type
Turbo-shaft
Model / ICAO
206B B06
Aircraft Type
Rotorcraft
No. of Engines
1

Analysis

THIS CASE WAS MODIFIED DECEMBER 20, 2005.

On October 3, 1998, approximately 1730 mountain daylight time, a Bell 206B, N992SM, was substantially damaged when it collided with terrain during landing near Vernal, Utah. The private pilot and his passenger were not injured. Visual meteorological conditions prevailed, and no flight plan had been filed for the personal cross-country flight being conducted under Title 14 CFR Part 91. The flight originated at Steamboat Springs approximately 1700.

According to the pilot's accident report, his passenger became air sick and he was attempting to land with a strong quartering tailwind. The pilot said the helicopter "was practically in a hover [with] full power applied...when a gust of wind from behind hit me just as I was turning into the wind using left pedal. The helicopter weather vaned, I reacted with full right pedal and then the gust either stopped or came from a different direction weather vaning us back to the west where I applied full left pedal. I could feel buffeting in the controls similar to turbulence. The right yaw was so rapid that I entered loss of tail rotor effectiveness." The helicopter collided with terrain while it was still turning and rolled over.

According to the passenger's statement, the pilot had attempted to land at Kremmling, Colorado, earlier in the day but had difficulty with the wind. After several attempts, he landed. The passenger also stated he felt the difficulties with the landings at Kremmling, Colorado, and Vernal, Utah, was due to "low clouds, rain and poor visibility." Visual meteorological conditions prevailed at Unitah County Airport, Vernal, Utah, located 35 miles west of the accident site.

The helicopter's left skid and main rotor blades were severed on impact.

Data Source

Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# DEN99LA002