What was found
LEFT AND RIGHT TAI AMBER AT 26000 FT EGT AND BLUE IN TRANSIT LIGHTS. FIM GREEN TAI INDICATION DOES NOT SHOW ON THE CDS - FAULT ISOLATION STATES CHANGE VALVE WHICH WAS DONE APPEARS TO BE WIRE ISSUE ACCORDING TO FIM. ALSO RAN #2 ENGINE AND TAI WORKED NORMAL NO FAULTS ALL LIGHTS WERE CORRECT. REMOVED REPLACED #1 ENGINE TAI VALVE. REF AMM 30-21-11, RAN NUMBER 1 ENGINE AND TAI VALVE HAD NO LEAKS. BLUE OVERHEAD LIGHT IN COCKPIT WORKED AS NORMAL BUT HAD A AMBER TAI LIGHT ON EICAS PANEL. TAI VALVE IS OPENING AND CLOSING VERFIED WITH RISE IN RAN NO. 1 ENG VERIFIED TAI INDICATION ON CDS STAYS AMBER WITH EITHER DEU SWITCH ALL ON 1 OR ALL ON 2. TAI VALVE LIGHT GOES FROM BRIGHT TO DIM NORMALLY. SEE NEW OPEN LOG 3971820 CHECK GOOD. REF FIM 30-21 TASK 806 STARTED TROUBLESHOOTING AT ITEM F.4. CHECKED WIRING FROM CONNECTOR DP1303 TO DEU 1&2 CONTINUITY AND MEGGER CHECK GOOD REF WDM30-21-11 & WDM 31-62-14. CHECKED CONTINUITY OF SWITCHES IN #1 ENG COWL ANTI ICE VALVE SWITCHES