BS ISO 2020-1:1997 pdf free.Aerospace一Preformed flexible steel wire rope for aircraft controls—Dimensions and loads. BS ISO 2020-1 1 Scope This part of ISO 2020 specifies the requirements which shall be satisfied by preformed flexible steel wire ropes for aircraft controls. The wire ropes shall be capable of operation within the temperature range of- 54 °C to+ 121 °C.2 Normative references...