EVASIVE ACTION CLB BY A A-320 CREW IN RESPONSE TO TCASII RA DURING IAP LOC APCH INTO SAN. POTENTIAL CONFLICT EXPERIENCED.

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PF NEW A320 CAPT. PNF STANDARDS CAPT CONDUCTING IOE. ATC HAD KEPT OUR FLT HIGH; RELATIVE TO A NORMAL DSCNT PROFILE TO FINAL. PRIOR TO THE INCIDENT; WE HAD BEEN CLRED TO THE LOC 27 APCH; TO INTERCEPT THE LOC AT OR ABOVE 3800 FT. ESTABLISHED ON THE LOC; WE CONTINUED DSCNT TOWARDS 2000 FT; A TA FROM TCASII ACTIVATED AND PNF CALLED 'TA AT 9:30 O'CLOCK POS; 700 FT BELOW AND LEVEL.' THE TA VERY SOON PROGRESSED TO A RA COMMANDING A CLB. THE STANDARDS CAPT MADE VERBAL INPUTS SUPPORTING THE AURAL TCASII CLB COMMANDS; AND THE PF INITIATED A CLB FROM APPROX 2600- 3000 FT (EXACT ALT NOT DETERMINED). THE CHANGE OF FLT PATH WAS APPROPRIATELY SOMEWHAT ABRUPT; BUT THE RA STOPPED ALMOST IMMEDIATELY. THE INTRUDER ACFT; A HIGH WING CESSNA; WAS VISIBLE TO THE L SEAT PLT DURING THE RA CLB (11 O'CLOCK LOW) AND WAS VISIBLE TO THE R SEAT PLT LATER (FROM 12 O'CLOCK LOW UNTIL BEYOND THE R WING). A DEAD-HEADING PLT IN THE CABIN SAW THE ACFT PASS OFF THE R SIDE. THERE WAS NO APPARENT ALTERATION TO THE CESSNA'S FLT PATH. BOTH CREW MEMBERS ESTIMATE CLOSEST PROX TO OUR ACFT TO BE 1/4 MI LATERALLY AND 300 FT VERT BELOW. AFTER CLBING TO APPROX 3000 FT; A DSCNT WAS RESUMED TO A STABILIZED APCH PROFILE PRIOR TO 1000 FT AGL. DURING THE ABRUPT PULL-UP SOME GALLEY SUPPLIES WERE BROKEN; BUT NO INJURIES OCCURRED. SEATBELT SIGN WAS ON. THIS TFC CONFLICT COULD HAVE BEEN RESOLVED MORE EFFICIENTLY IF THE RA COMMAND HAD BEEN CARRIED OUT IMMEDIATELY; OR IF ATC HAD NOTIFIED US OF TFC IN THE VICINITY. THE CURRENT SOFTWARE IN THE A320 TCASII DOES NOT DISPLAY TFC UNTIL A TA IS GENERATED. IT IS MY UNDERSTANDING THAT THIS WILL BE CHANGED IN THE NEAR FUTURE. A CONTRIBUTING FACTOR ALSO WAS THE SUNLIGHT WASHING OUT THE VISUAL RA DISPLAY. ALSO THE NEW CAPT RECEIVING TRAINING HAD NEVER SEEN THIS RA DISPLAY IN A FLT SIMULATOR OR THE ACFT. THE TCASII TRAINING WAS ACCOMPLISHED USING A COMPUTER TERMINAL WITH SIMULATED DISPLAYS. ACFT SIMULATORS USED IN TRAINING HAD NO TCASII DISPLAY FOR TRAINING. THE FLC DID NOT IMMEDIATELY NOTIFY ATC OF THE ENCOUNTER; THIS SHOULD HAVE BEEN DONE TO AID IN INVESTIGATING THE ENCOUNTER.