Woken at 2 AM to go on Mission #1 to Manneheim Railroad yards. Took off at 5:30 AM with full crew except CP Boles. Traveled about 70 miles into France and turned around because of lost supercharger and engine trouble. Hit twice by light flak. Luckily we turned back as lead navigator has us way south of course and the rest all went directly over Paris and got shot up pretty badly. Came back to field pretty sick. Alerted for tomorrow again. 5 hours.