Accident Details
Date
Tuesday, March 19, 1991
NTSB Number
LAX91LA137
Location
RICHVALE, CA
Event ID
20001212X16635
Coordinates
39.479099, -121.839874
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
1
Total Aboard
1
Probable Cause and Findings
THE FAILURE OF THE ENGINE'S NUMBER 4 CYLINDER INTAKE VALVE KEEPER. TREES UNDER THE HELICOPTER AT THE TIME OF THE LOSS OF ENGINE POWER WERE FACTORS IN THE ACCIDENT.
Aircraft Information
Registered Owner (Current)
Name
SIERRA AERONAUTICS LLC
Address
40 SULPHUR SPRING CHURCH RD
City
FRANKLIN
State / Zip Code
KY 42134-8569
Country
United States
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# LAX91LA137