Following the changeover from 100/130 grade fuel to higher performance 100/150 grade during the summer of 1944, 8th Air Force P-51 groups reported an alarming increase in the number of take-off crashes due to engine failure, mostly caused by spark plug fouling. One such incident involved Capt. William J. Shackelford’s former mount, P-51B 42-106875, E2:D of the 375th, at Little Walden on 9 November 1944, but the pilot, Lt. William H. Street, escaped unhurt.(Pearce)