Date: 11 February 1990
Time: 06:16:00 UTC
Date: 9 August 1990
Time: 07:33:57 UTC
Location: 67° 17' N, 50° 51' E
Kvant, 13 February 1990 06:38 UTC - 21 February 1990 03:56 UTC
fore unit of Mir, 21 February 1990 04:15 UTC - 28 May 1990 11:45 UTC
Kvant, 28 May 1990 12:11 UTC - 3 July 1990 22:07 UTC
fore unit of Mir, 3 July 1990 22:31 UTC - 9 August 1990 04:09 UTC
Duration: 179 days, 1 hours, 17 minutes, 57 seconds
Call Sign: Rodnik (Spring - water spring)Mir Mission Designation: EO-6
Thermal protection sheets on the capsule came loose. On 17 July 1990, Solovyov and Belandin went out to repair the insulation. With the job mostly complete, and running low on oxygen, they reentered Mir through the Kvant-2 module. The airlock hatch would not close properly. Fortunatedly, the design of Kvant-2 allowed the men to use the middle compartment as an airlock to reenter. Another spacewalk on 25 July finally ot the hatch to close properly.
The lesson learned from this was that on all future hatch designs, the hatch opened inwardly so that cabin air pressure could hold a hatch closed in the event of a latching failure.