All ISS systems continue to function nominally, except those noted previously or below. Sunday – a full-rest day for the crew. Ahead: Week 5 of Increment 21.
FE-1 Suraev did the regular daily early-morning check of the aerosol filters at the Russian Elektron O2 generator which he had installed on 10/19 in gaps between the BZh Liquid Unit and the oxygen outlet pipe (filter FA-K) plus hydrogen outlet pipe (filter FA-V). [FE-1 again inspects the filters tonight at bedtime, currently a daily requirement per plan, with photographs to be taken if the filter packing is discolored.]