[2] The docking with Salyut 6 was delayed after the Soyuz's onboard Argon computer determined it would occur outside radio range with the TsUP.

[1] This freed the remaining docking port for the arrival of the Soyuz 39/EP-9 crew on 22 March.

In mid-May, Kovalyonok and Savinykh replaced the spacecraft's probe with a Salyut drogue.

This may have been an experiment to see if a Soyuz-T docked to a space station could act as a rescue vehicle in the event that an approaching Soyuz-T equipped with a probe experienced docking difficulties and could not return to Earth.

Soyuz T-4 landed over three hours later, touching down 125 kilometres (78 mi) east of Dzhezkazgan, Kazakh SSR.