There may be a local archive at the place where the crew was buried. When doing research like this, and the more accessible sources do not have the desired information, then local sources should be investigated. Some other suggestions:
https://www.cwgc.org/find-records/find-war-dead/
https://www.abmc.gov/cemeteries-memo...ican-cemetery/
https://wwiiregistry.abmc.gov/