What was found
ON APPROACH PHASE APROX @ 17000 FT WITH AUTOPILOT ON WE STARTED GETTING MECHANICAL MULTIPLE ALERTS GPWS WARNING " LANDING GEAR, BANK ANGLE, TOO LOW TERR, TERRAIN, TERRAIN," AURAL WARNING'S WITH NO EICAS MESSAGES. DECLARED EMERGENCY.-C/A-PERFORMED OPT OF EGPWS/WINDSHEAR SYSTEM IAW EMB145 AMM 34-41-00. OPT GOOD.