NTSB Identification: MKC82IA042
14 CFR Part 121: Air Carrier operation of TRANS WORLD AIRLINES INC
Incident occurred Monday, March 08, 1982 in LAS VEGAS, NV
Probable Cause Approval Date: 03/08/1983
Aircraft: BOEING 707-131B, registration: N6728
Injuries: 1 Fatal.

NTSB investigators used data provided by various sources and may not have traveled in support of this investigation to prepare this aircraft incident report.

THIS INCIDENT OCCURRED WHEN THERE WAS NO INTENT TO FLY. ON 3-8-82, A BOEING 707-131, OWNED AND OPERATED BY TWA, WAS RECEIVING ROUTINE MAINTENANCE IN LAS VEGAS, NV. DURING THE CHECK, THE SERVICING VALVE ON THE FORWARD WATER TANK WOULD NOT OPEN. A TWA MECHANIC ENTERED THE FORWARD ELECTRONICS BAY TO CHECK THE VALVE CONTROL MECHANISM WHILE THE LEAD MECHANIC OPERATED THE VALVE FROM OUTSIDE. THE VALVE OPERATED NORMALLY AND THE LEAD MECHANIC YELLED "IT'S OK". A SHORT TIME LATER, ANOTHER MECHANIC LOOKED IN THE COMPARTMENT, DID NOT SEE ANYONE AND SECURED THE HATCH. THE MECHANIC'S ABSENCE WAS NOT NOTED UNTIL THE NEXT DAY. ON 3-9-82, THE AIRPLANE FLEW TO ST. LOUIS, MO WHERE THE MECHANICS BODY WAS DISCOVERED AFTER SEARCH WAS INITIATED BY THE LAS VEGAS STATION MANAGER. AN AUTOPSY REVEALED THAT THE MECHANIC WAS ELECTROCUTED WHEN HE CAME IN CONTACT WITH SEVERAL 115 VOLT RELAYS IN THE ELECTRONICS COMPARTMENT. INJURIES FOUND DURING AUTOPSY INDICATE THAT THE MECHANIC SLIPPED AND STRUCK HIS HEAD AND FELL ON THE RELAYS.

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

ELECTRICAL SYSTEM,ELECTRIC RELAY..IMPROPER

The National Transportation Safety Board determines the probable cause(s) of this incident to be:

MAINTENANCE,MODIFICATION..IMPROPER..COMPANY MAINTENANCE PERSONNEL

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