Accident Details
Date
Sunday, March 31, 1991
NTSB Number
SEA91LA077
Location
WAITSBURG, WA
Event ID
20001212X16707
Coordinates
46.219707, -118.149070
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
1
Total Aboard
1
Probable Cause and Findings
THE IMPROPER INSTALLATION OF THE MAIN ROTOR MAST NUT AND LOCK WASHER BY MAINTENANCE PERSONNEL WHICH RESULTED IN THE SEPARATION OF THE MAIN ROTOR SYSTEM.
Aircraft Information
Registration
N38926
Make
BELL
Serial Number
NAH 1957-1
Engine Type
Reciprocating
Registered Owner (Historical)
Name
WAITSBURG HELICOPTER SERVICE
Address
RT 1 PO BOX 658
Status
Deregistered
City
WAITSBURG
State / Zip Code
WA 99361
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# SEA91LA077