The original enquiry of Adam was posted in the forum of uboat.net:
http://uboat.net/forums/read.php?3,91752
The source for the names of the rescued crew members come from the KTBs of the involved U-boats, so it is possible that there are some errors in the ranks and spelling of the names.
Discussed are two similar incidents, both involving failed attempts of Dornier flying boats to pick up German airmen in the Mediterranean on 15 June 1942 and the subsequent rescue by two different German U-boats the following night.
A story about these rescue missions is published here:
http://www.dornier24.com/pages/stories/story7.html
But there it is stated that the aircraft scuttled by U-83 was CM+IQ (Wnr 51) while Matti identifies it as CM+IO (WNr 31).
However, I noticed several other errors in that text. Suda is on Crete, the correct rank of the U-boat commander was Kapitänleutnant and he was awarded the Knights Cross at the end of this patrol in June 1942, but certainly not for having rescued the German airmen.