light ▁Engine er ). ▁ ▁C rew ▁ ▁The ▁backup ▁crew ▁for ▁this ▁expedition ▁were ▁Vik tor ▁Af anas ye v ▁( Comm ander ) ▁and ▁Mus a ▁Man ar ov ▁( F light ▁Engine er ). ▁ ▁Over view ▁ ▁C rew ▁Ar rival ▁The ▁two ▁crew ▁members ▁arrived ▁at ▁Mir ▁via ▁So y uz ▁T M - 1 0 , ▁which ▁launched ▁on ▁ 3 ▁August ▁ 1 9 9 0 . ▁The ▁So y uz ▁space craft ▁dock ed ▁on ▁to ▁the ▁K v ant 2 ▁Complex . ▁ ▁Mission ▁High light s ▁While ▁on ▁board , ▁the ▁crew ▁conducted ▁an ▁extensive ▁programme ▁of ▁ge oph ys ical ▁and ▁ast ro phys ical ▁research , ▁experiments ▁on ▁bi ology ▁and ▁bi ote chn ology ▁and ▁work ▁on ▁space ▁materials ▁science . ▁They ▁also ▁performed ▁extensive ▁maintenance ▁and ▁repair ▁work ▁on ▁the ▁dam aged ▁h atch ▁of ▁the ▁K v ant - 2 - module . ▁This ▁repair ▁was ▁only ▁partially ▁successful . ▁ ▁Ex ped ition ▁Con clusion ▁The ▁crew ▁left ▁on ▁So y uz ▁T M - 1 0 ▁on ▁ 7 ▁December ▁ 1 9 9 0 . ▁The ▁expedition ▁in ▁total ▁last ed ▁ 1 3 0   days , ▁ 2 0   h ours ▁and ▁ 3 5   min utes . ▁The ▁crew ▁completed ▁ 2 0 7 0 ▁or bits ▁of ▁the ▁Earth . ▁ ▁See ▁also ▁▁▁ 1 9 9 0 ▁in ▁space fl ight ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Space