What was found
ETOPS SIGNIFICANT SYSTEM - ATB - IN CRUISE FL 340 ,LOST A/P A/T AND TAT PROB INOP EICAS MSG TRIED L&R A/P ALSO INOP,DIVERTED TO SFO. T/S AND FOUND TAT PROBE FAULTY. REMOVED AND REPLACED IAW AMM 34-12-02-004-001 AND 34-012-02-004-008.RAN TEST 01-,02,10 ALONG WITH TEST 40. ALL CKD AND PASSED.A/C REMAINS IN CAT 3(LAND 3).