When DOS#1 was cleared for flight, it still had 182 discrepancies, of which only 10 were duplicates and 20 were purely cosmetic. Preparations for launch of Soyuz 10 were complicated by problems with the logic of the abort system. This was supposed to put the spacecraft in a purely ballistic re-entry mode.

At 07:30 Chertok went via Korolev Street to the TsKBM company airport, Vnukovo-3., to pick-up the ARS equipment. This was an essential part of an emergency x-ray system that would assist the cosmonaut in completing a hard docking in case the primary system failed.