This info from Joe Baugher's site...
"1418 converted to KC
-135R, 153rd ARS) w/o during ground test at Tinker AFB
Apr 7, 1999 when pressurization test wrecked the
rear fuselage. At previous maintenance, the pressure
relief valves were secured shut and were not released
afterwards. I have seen this plane quoted as 57-1478, but 71418 is on the tail
in the wreck photos."
A/C serial is 57-1418