I can only find two possibles from the USAAF 8th Airforce. Both were later in the war duing late 43 or 44 October and November respectively, and both B17's (have'nt got the reference to hand at the moment). These obviously are at odds with the sewing sugar beet account, unless maybe it was a very late harvest, or perhaps due to wartime conditions they were sewing year round to try to increase food production?. I have no idea if thats plausible as my father never mentioned any similar events, perhaps being nearer to the farming community you might be able to find out. I will try and find a bit more if you think either of these two might fit. Other possibilities are test or training flights but my references only cover combat missions.
Rgds
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