[ggm]

Contact his squadron/flight history people, which the USAAF history project (or the RAF equivalent) should be able to identify and confirm from notes in their holdings.

All flight crew had to detail things like this, because failure to drop bombs could mean not completing your "mission" which meant you were one less towards being rotated out of active duty. Therefore the records where pretty remorseless

(on drop, bombs caused a semi-automatic camera to fire and record where they were)

https://www.afhra.af.mil/

https://www.forces-war-records.co.uk/