Accident Details
Date
Wednesday, March 31, 1993
NTSB Number
DCA93MA033
Location
ANCHORAGE, AK
Event ID
20001211X11963
Coordinates
61.159198, -149.990325
Aircraft Damage
Substantial
Highest Injury
None
Fatalities
0
Serious Injuries
0
Minor Injuries
0
Uninjured
5
Total Aboard
5
Probable Cause and Findings
THE LATERAL SEPARATION OF THE NO. 2 ENGINE PYLON DUE TO AN ENCOUNTER WITH SEVERE OR POSSIBLY EXTREME TURBULENCE THAT RESULTED IN DYNAMIC MULTI-AXIS LATERAL LOADINGS THAT EXCEEDED THE ULTIMATE LATERAL LOAD-CARRYING CAPABILITY OF THE PYLON, WHICH WAS ALREADY REDUCED BY THE PRESENCE OF THE FATIGUE CRACK NEAR THE FORWARD END OF THE PYLON'S FORWARD FIREWALL WEB.
Aircraft Information
Registration
N473EV
Make
BOEING
Serial Number
19657
Year Built
1970
Model / ICAO
747-121
Registered Owner (Historical)
Name
WELLS FARGO BANK NORTHWEST NA TRUSTEE
Address
299 S MAIN ST # U1228-120
Status
Deregistered
City
SALT LAKE CITY
State / Zip Code
UT 84111-2263
Country
United States
Analysis
SEE NTSB BLUE COVER AVIATION ACCIDENT REPORT AAR-93-06 FOR FURTHER INFORMATION.
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# DCA93MA033