It was decided that henceforth, cosmonauts would wear pressure suits for launch and the return to Earth. Also, a system was installed to automatically pump air into the descent module in the event of decompression. Additionally, the ventilation valves were modified so a premature opening would cause them to re-close automatically. Of course these changes meant the spacecraft could only accommodate two cosmonauts.
Just before the start of another communication session, Volkov noticed a smell of smoke from somewhere at the rear of the station. As soon as communication with the ground was established, he reported: “Aboard the station is ‘the curtain’!”