One of four
ACH-47A attack helicopters assigned to "
Guns-A-Go-Go".
Tail number 64-13145, it was lost on May 5, 1967 at
Bong Son when a fitting on the forward 20mm
cannon came loose and the
cannon swung upward and fired into the forward engine, causing the aircraft to crash.
Source: Frank White's "Guns-A-Go-Go" reunion site at http://www.atomic.net/~whitef/