MIL-R-27521A (NOTICE-3), MILITARY SPECIFICATION: RECEPTACLE, FLYING BOOM, AERIAL REFUELING, GENERAL SPECIFICATION FOR (29-FEB-2008)

MIL-R-27521A (NOTICE-3), MILITARY SPECIFICATION: RECEPTACLE, FLYING BOOM, AERIAL REFUELING, GENERAL SPECIFICATION FOR (29-FEB-2008)., MIL-R-27521A, dated 26 September 1997, remains inactive for new design; however, the document is valid for use.