Hi,
From Dan O'Connell.
Me 262 Production Log, (2005), p. 45:
"
170040 Call sign KI+IT. Me 262 A-2a. ... Lt. Rolf Weidemann of 3./KG 51 was KIA in this aircraft, coded '9K+OL', on 8 September 1944. He was shot down by light British flak 5 miles northeast of Diest, Belgium (or Maastricht, Netherlands) while strafing troops with its two MK 108 cannon at about 500 feet. This was the first Me 262 to be examined by Allied intelligence. Although the airframe was completely destroyed when it crashed into a forest, its engines were recovered and sent to the RAE at Farborough [sic] in the UK for examination ..."
Richard T. Eger, in this source, gives more information:
http://www.lwag.org/forums/showthread.php?t=3235
best regards,
Jim Geens