The ABMC database and the USAAF personnel database both have these men registered as lost on 5 April 1943.
https://www.abmc.gov/database-search
http://www.usaafdata.com/search
This crew is not listed in the USAAF "AIRCRAFT ACCIDENT AND INCIDENT REPORTS" list available online, I checked both dates and also 4 April (day of departure):
http://airforcehistoryindex.org/data/000/877/133.xml
http://airforcehistoryindex.org/data/000/877/134.xml
http://airforcehistoryindex.org/data/000/877/145.xml
This is probably because they are covered by a MACR and were lost without a trace, so no accident report was written for them.