As this apparatus was already in use, I assume that it was listed in the Record List_of_Laboratory_Equipment (8.1_Appendix_1). You could indicate in this record that it “removed or retired”, i.e. taken of service, by adding another column. I would use this option if you are a laboratory that has a big turnover of equipment. Otherwise just remove the entry from the record, strikeover the text or add a comment and save an updtated revision of the record. If you already have an Equipment_Maintenance_Record (Appendix_4) for the apparatus, record in there as well, that the apparatus is out of service.
Don’t forget if you are storing the item in the laboratory to mark it clearly as “out of service” as well.