Summary
On August 22, 1991, a Boeing 747-151 (N604US) was involved in an accident near Seattle, WA. The accident resulted in 11 minor injuries, with 376 people uninjured out of 387 aboard. The aircraft sustained minor damage.
The National Transportation Safety Board determined the probable cause of this accident to be: A FIRE IN THE NUMBER 4 ENGINE, RESULTING FROM A FUEL LEAK AT THE MAIN FUEL CONTROL UNIT, DUE TO IMPROPER MAINTENANCE BY UNKNOWN/UNDETERMINED PERSON. THE L5 EMERGENCY EXIT FAILED TO OPERATEE DUE TO A BROKEN PLASTIC PULLEY GUARD IN THE SLIDE RELEASE MECHANISM.
This accident is documented in NTSB report SEA91IA219. AviatorDB cross-references NTSB investigation data with FAA registry records to provide comprehensive safety information for aircraft N604US.
Accident Details
Probable Cause and Findings
A FIRE IN THE NUMBER 4 ENGINE, RESULTING FROM A FUEL LEAK AT THE MAIN FUEL CONTROL UNIT, DUE TO IMPROPER MAINTENANCE BY UNKNOWN/UNDETERMINED PERSON. THE L5 EMERGENCY EXIT FAILED TO OPERATEE DUE TO A BROKEN PLASTIC PULLEY GUARD IN THE SLIDE RELEASE MECHANISM.
Aircraft Information
Registered Owner (Historical)
Data Source
Data provided by the National Transportation Safety Board (NTSB). For more information on this event, visit the NTSB Records Search website. NTSB# SEA91IA219