What was found
ETOPS SIGNIFICANT SYS - TAS AND SAT IN ERROR, TAS READS 440KTS, SHOULD BE 464. SAT READS -80,SHOULD BE -54. MACH AND TAT NORMAL. C/W FIM 34-12-11, FIG 107 TEST ADC IAW 34-12-00 FOUND TAT AND SAT ROLLING FROM NEG TO POS, NR 10000. REPLACED TAT PROBE IAW AMM 34-12-02-404. LT ADC FUNCTIONAL TEST SHOWED NO FAULTS. PROBE HEAT TEST IS GOOD, TAT TEST OK. MCDP TEST 30 SHOWS NO FAULTS.