AFTER A FORWARD PITCH DOWN ON THE AUTOPLT; AN A310'S GPWS AND TWR'S MSAW ALERTS TEST FLT CREW TO PERFORM A MISSED APCH WHEN UNDER GS ON THE RWY 36R APCH TO MEM.

Narrative

PERFORMING CAT II CHK PER MAINT REQUEST ON AUTOPLT #2 ONLY DUE TO AUTOPLT #1 MEL'ED INOP. AUTOLAND LIGHT TEST TESTED OK. WX CLR; 10 MI VISIBILITY; TWR WINDS 130 DEGS AT 7 KTS. ON DOWNWIND; I GAVE MEM TWR PIREP THAT WINDS AT 3000 FT OR 4000 FT (CAN'T REMEMBER WHICH) WERE 180 DEGS AT 30 KTS (WHICH MEANT TAILWIND FOR LNDG RWY 36R; WHICH WAS IN USE). UPON CLRING US FOR RWY 36R ILS APCH; APCH CTL STATED 'MAINTAIN 170 KTS UNTIL MCGHE.' I (CAPT) STATED THAT WE WOULD HAVE TO START TO SLOW JUST PRIOR TO THAT. APCH CTL THEN STATED THAT THERE WAS NO TFC BEHIND US AND 'SPD OUR DISCRETION.' I BELIEVE WE CROSSED MCGHE AT ABOUT 155 KTS; BUT I CAN'T REMEMBER EXACTLY. ALL NORMAL THROUGH LOC CAPTURE AND GS CAPTURE AND WE WERE COMPLETING CONFIGURING WITH FLAPS AND GEAR AND PERFORMING BEFORE LNDG CHKLISTS; WHEN WE GOT EGPWS 'BELOW GS' ALERT DUE TO AUTOPLT EXCESSIVE FORWARD PITCH PRESSURE AND EXECUTED MISSED APCH. SIMULTANEOUSLY; I (CAPT) AM PRETTY SURE ATC; MEM TWR; ADVISED US THAT THEY HAD A 'TERRAIN ALERT' ON US AND I ACKNOWLEDGED SAME. THE TWR VOLUME ON THIS ADVISORY WAS WEAK; MAYBE 30% OR 40% OF NORMAL VOLUME; THUS THE SLIGHT DOUBT. FO DID NOT HEAR THIS ATC ALERT DUE TO LOW VOLUME AND BECAUSE OF THE GPWS 'BELOW GS' ALERT AND HIS FOCUSING ON THE MISSED APCH. SLIGHT PICTURE CONFIRMED THAT WE WERE LOW. AFTER MISSED APCH EXECUTED; NORMAL APCH AND LNDG AGAIN TO RWY 36R AND FMS WIND READOUT AT 500 FT WAS ABOUT 145 DEGS AT 25 KTS (BUT THERE IS TYPICALLY A LAG IN THIS READOUT); AND TWR STILL RPTING WIND 130 DEGS AT 7 KTS. HUMAN PERFORMANCE-WISE; I THINK THAT I WOULD HAVE CAUGHT THE GS DEV EVEN SOONER IF WE HAD NOT HAD THE MINOR DISTR OF WHEN AT 'GS STAR;' GS INTERCEPT; I SET 5000 FT IN FCP FOR ILS MISSED APCH ALT PER SOP; AND FO QUERIED AS TO WHETHER WE SHOULDN'T INSERT 2000 FT FOR MISSED APCH SINCE WE WERE IN VISUAL CONDITIONS. I STATED NO; THAT WE WERE 'CLRED FOR ILS' THUS THE ILS MISSED APCH ALT WAS REQUIRED. I THEN LEFT 5000 FT; SET FOR POSSIBLE MISSED APCH. THIS ABOVE INTERCHANGE TOOK A FEW; OR SEVERAL; SECONDS DURING AN ALREADY BUSY TIME OF CONFIGURING FLAPS AND GEAR AND BEFORE LNDG CHKLIST; THUS DIMINISHING BOTH MYSELF AND FO'S INST MONITORING DUTIES.