[Johannes]

Hi Keith

Don't think that JG54 ever got as far south as Ukraine, that would be JG52's area, and they never flew Fw190's, perhaps JG51 who flew both Bf109's and Fw190's are who you are looking for, and they lost at least one Fw190 on this day when Ofw Joacim Bussert was injured when he crashed his Fw190 during landing, but don't know where, or if because of battle damage.
But saying that the only claimers of P-39's flying Fw190's were 1./JG54,3./JG54(Kittel) and 11./JG54(Hartrampf over the Baltic Sea). Other option would be 10./JG11, don't know what they were flying, but again I think they were too far North for Ukraine!

Regards

Johannes