Ju 290 A-3, no. 0163, was flown to Travemünde for the necessary modifications, but the work was delayed and it was decided to send Kessler aboard the submarine U-234 instead.
Ju 290 A-3, č. 0163, bol prenesený do Travemünde k potrebným modifikáciám, ale práce sa oneskorili, a tak bolo nakoniec rozhodnuté Kesslera poslať ponorkou U-234.