Salyut 7: A Leaking Line, Repaired Step by Step

Repeated work on the propulsion system’s oxidizer piping, which carries oxidizer, did not stop the leak; nitrogen checks still detected it.

The VE-4 crew delivered a Portable Pneumo Press with manuals, operating photos and an instructional video for the repair.

On an August 8 spacewalk, Kizim and Solovyov used the press to squeeze a stainless-steel pipe.

After the repeated repair attempts, checks confirmed that Salyut 7’s ODU oxidizer system was sealed.