Rita-- For Operation Market-Garden (OMG) the 315th TCG provided two serials of 45 planes each on 17SEP44.These serials were designated A-11 and A-13.
Their Drop Zone (DZ) was designated "O", which was west ofNijmegen (Ni-May-gen).Scheduled drop times were H-hour plus 14 and 18 minutes respectively. (H+0014[1313hrs] and H+0018[1317hrs]). Their 2,031 paratroopers were from the 504th Parachute Infantry Regiment of the 82nd Airborne Division. Based on the official post mission summary it appears to me that only one aircraft was lost in the 315th serials.This was in serial A-11.
"USAF Historical Study No.97" which details Airborne Operation in Europe during WW2 states: "One planeload carried by the 315th Group went down over western Holland".
It would appear from this statement that this aircraft did not make it into the DZ area but rather was hit while still enroute to DZ "O".
This is just some overview information on the "big picture".The 504th PIR is a particular interest area of mine and I have several contacts in Holland who could add to your research given a bit of additional information. I am also in contact with the veteran coordinator of the 315th.Drop me a line and I will forward contact information.
Based on your listing of names, it is likely that this aircraft was a "lead crew".Typically, most crews were four men.A lead crew would carry a third officer--a navigator.Your uncle was either the crew chief or radio operator.
Dave Berry PS: Feel free to send the photo of the crewmen.