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 |
|---|---|---|---|---|---|
| Aug-2022 | N | Aug-2022 | R | Update technical requirements, references and format. Incorporated CCR# 4530, 6338, 6340, 9585 | |
| May-2015 | N | May-2015 | R | Tri-Annual Database Maintenance (TADM) completed | |
| Nov-2012 | N | May-2010 | C | 1 | Submittal Article compliance |
| May-2010 | N | May-2010 | N | Renumbered to NASA fifth level; Superseding UFGS 23 37 13 with no title change | |
| Aug-2008 | N | Apr-2008 | D | Renumbered/ Superseded by UFGS 23 37 13 with same title | |
| Apr-2008 | N | Apr-2008 | R | Section References (SRF) update | |
| Jun-2006 | N | Jun-2006 | R | Title changed from DIFFUSERS; Section References (SRF) updated |
