Date:	Thursday 3 June 1971
Time:
Type:	Boeing KC-135Q Stratotanker
Owner/operator:	United States Air Force - USAF
Registration:	58-0039
MSN:	17784/254
Year of manufacture:	1959
Total airframe hrs:	5406 hours
Engine model:	Pratt & Whitney J57-P/F-59W
Fatalities:	Fatalities: 5 / Occupants: 5
Aircraft damage:	Destroyed, written off
Category:	Accident
Location:	Centenera -   Spain
Phase:	En route
Nature:	Military
Departure airport:	Madrid-Torrejón AFB (TOJ/LETO)
Destination airport:	Madrid-Torrejón AFB (TOJ/LETO)

Narrative:
Crashed following in-flight explosion of the no. 1 main fuel tank. Chafing of boost pump wires in conduits was determined to be as a possible ignition source.
The tanker plane was on its way back from a routine refuelling mission over the Mediterranean and crashed at the village of Centenera, 35 km NE of Madrid-Torrejón AFB (TOJ).

NTSB/AAR-00/03
Boeing KC-135 Stratotanker: More Than Just a Tanker (Aerofax Series) / Robert S Hopkins, III
The Telegraph - Jun 4, 1971

photo (c) Paul Johnson; Tokyo-Yokota AFB (OKO/RJTY); January 1967

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