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 |
|---|---|---|---|---|---|
| Feb-2017 | N | Feb-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Feb-2017 | N | Feb-2017 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Feb-2011 | N | Feb-2011 | N | Renumbered to NASA fifth level; Superseding UFGS 23 34 23 with no title change | |
| Aug-2008 | N | Apr-2008 | D | Renumbered/ Superseded by UFGS 23 34 23 with same title | |
| Apr-2008 | N | Apr-2008 | R | Section References (SRF) update | |
| Jul-2007 | N | Jul-2007 | R | Reference Update | |
| Jun-2006 | N | Jun-2006 | R | Title changed from POWER VENTILATORS; Reference and Section References (SRF) updated |
