ACR ON VISUAL APCH WITH PARALLEL VISUAL ON L RWY; LANDS WITHOUT CLRNC. TCASII DISTR.

Narrative

UNDER VISUAL METEOROLOGICAL CONDITIONS ON ARR IN SFO; WE WERE CLRED FOR A VISUAL APCH TO RWY 28R IN SFO. APCH CTL ADVISED THERE WAS AN MLG PARALLEL TFC ON A VISUAL TO 28L. THE CAPT WAS OPERATING THE RADIOS AND REPLIED THE ACFT WAS IN SIGHT AND OVERTAKING US ON OUR L SIDE. THE APCH CTLR ALSO TOLD US TO MAINTAIN AT LEAST 170 KTS TO THE 'BRIJJ'; WHICH IS ABOUT A 5 MI FINAL TO 28R. SIMULTANEOUSLY OUR TCASII UNIT ALERTED US TO A TFC ALERT; FOLLOWED BY MULTIPLE TFC RESOLUTIONS THESE INCLUDED 'STOP DSCNT; AND CLB; CLB' ETC. I NOTICED THE MLG SLIGHTLY AHEAD AND TO THE L; AS WELL AS ON THE TCASII DISPLAY SO I CONTINUED THE APCH AND LANDED WITHOUT INCIDENT ON RWY 28R. AFTER LNDG WE WERE TOLD TO HOLD SHORT OF RWY 28L AND CONTACT TWR. AT THIS POINT WE REALIZED WE PROBABLY HAD NOT RECEIVED A CLRNC TO LAND. THE TWR CTLR TOLD US TO CROSS 28L AND CONTACT GND CTL. GND CTL THEN CLRED US TO OUR GATE. IN CLOSING THE CAPT AND MYSELF DO NOT RECALL RECEIVING INSTRUCTIONS FROM APCH CTL TO CONTACT TWR. THE CAPT HAD NOT DIALED IN TWR FREQ ON THE RADIO. THIS IN CONJUNCTION TO CLOSE PROX WITH ANOTHER ACFT ON FINAL MULTIPLE TCASII ALERTS AND NORMAL AND LNDG DUTIES IN A 2 MAN HIGHLY AUTOMATED COCKPIT; WOULD CONTRIBUTE TO THIS EVENT OCCURRING. APCHS SUCH AS THIS ONE ARE OFTEN STARTED FROM A VERY HIGH DOWNWIND LEG SO PLT WORKLOAD IS VERY HVY IN THIS TYPE OF AIRPLANE.