Relating to the SS Steel Worker, there is an interview here with the 3rd Officer. In the full interview at starting about the 9 minute mark he talks about the sinking. He mentions that the ship had carried explosives which were unloaded first. As the ship was being moved to a new location to unload the rest of the cargo, the ship struck a mine. He mentions that Russian Divers later salvaged some? of the cargo. No mention of airplanes.
http://lcweb2.loc.gov/diglib/vhp-sto...8182/#vhp:clip
William Chambers died in 2014.
http://www.legacy.com/obituaries/was...?pid=170471948
The interview was done in 2004 by his daughter Kathryn Chambers (Joseph) Torpey of Alexandria, VA. It appears he had extensive written notes that he was using for the interview (his own diary perhaps). Maybe the daughter has those.
This link gives the location of the sinking and mentions that the ship was carrying foodstuffs (again no mention of airplanes).
http://www.wrecksite.eu/wreck.aspx?215401