A319 CREW FAILS TO MEET XING RESTR AT DRUZZ INTXN.

Narrative

ON DSCNT INTO DCA ON BUCKO 5 (STAR); I (PNF) WAS OFF RADIO #1 TO RECORD ATIS AND COORDINATE COMPANY GATE ASSIGNMENT. WHILE OFF; THE CAPT (PF) RECEIVED A DSCNT CLRNC TO CROSS DRUZZ AT 15000 FT. CAPT PROGRAMMED RESTR INTO FMGC. AFTER RECEIVING ATIS; CAPT INQUIRED AS TO ACTIVE RWY. RWY SWITCHED FROM FLT PLANNED RWY 19 TO RWY 1. WHILE I WAS STILL ON #2 RADIO WITH COMPANY; CAPT REPROGRAMMED FMGC WITH RWY 1. THIS RE-STRINGS ARR AND HAS THE EFFECT OF DELETING PROGRAMMED RESTRS. ACFT DEFAULTS TO VERT SPD MODE (IE; 1000 FPM). AFTER SPEAKING WITH COMPANY OPS; I RETURNED TO #1 RADIO JUST IN TIME TO HEAR ATC ASK IF WE WOULD BE ABLE TO MEET RESTR AT DRUZZ. I REPLIED NEGATIVE; AS I WAS UNAWARE OF THE RESTR. ZDC REISSUED A CLRNC TO 15000 FT (SANS DRUZZ) AND WE THEN EXPEDITED TO 15000 FT XING DRUZZ AT 17300 FT. MAJOR CAUSAL FACTORS INCLUDED THE CAPT. OPERATING SINGLE PLT AND FMGC'S TENDENCY TO DELETE ARR RESTRS WITH A RWY CHANGE. SUPPLEMENTAL INFO FROM ACN 459973: LESSONS LEARNED: 1) MUST BE MUCH MORE ALERT WHEN OTHER PLT IS OUT OF THE LOOP. 2) MUST BE MUCH MORE ALERT WHEN DSNDING IN AN EXCESSIVE TAILWIND SIT. 3) MUST BE MUCH MORE ALERT WHEN HAVING TO RECONFIGURE THE MCDU/FMS DURING A MANAGED DSCNT AFTER BEING ASSIGNED A XING RESTR.