History: Below is a listing of the Revisions and Changes made to this UFGS.
| KEY | PREPARING ACTIVITY (PA) | A Army | N Navy | F Air Force | S NASA [ARCHIVED] |
|---|---|---|---|---|---|
| ACTION | N New | R Revision | C Change | D Deletion |
| Release | PA | Date | Action | Change # | Nature of Change or Revision |
|---|---|---|---|---|---|
| May-2017 | N | May-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| May-2017 | N | May-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Feb-2011 | N | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 40 18 00 with no title change | |
| Apr-2008 | N | Jul-2007 | D | Renumbered/ Superseded by UFGS 40 18 00 with same title Note: The last published PDF version of this Section is available in the previous release in the UFGS Archives. | |
| Jul-2007 | N | Jul-2007 | R | Reference Update | |
| Jul-2007 | N | Jul-2007 | R | Reference Update | |
| Jun-2006 | N | Jun-2006 | R | Title changed from VACUUM SYSTEMS; Reference and Section References (SRF) updated |
