What was found
IN FLIGHT SHORTLY AFTER T/O WING A-1 FAIL MSG. AFTER PUSHING OUT WING A/I BUTTON FOLLOWING QRH TO RESET. A-1 WING 1 LEAK CAME ON EICAS. FOLLOWED QRH ISOLATED LT WING FROM ALL BLEED SOURCES. ON SYSTEMS PAGE LT WING DIAGRAM WAS AMBER AND TEMP WAS 290 C. WHILE RT WING TEMP WAS -4 C. THE WING LEAK MSG DID NOT EXTINGUISH AT LEAST 5 MIN. THE TEMP INDICATION ALSO WENT TO AMBER DASHES THEN CAME BACK IN 5 MIN AND SHOWED ROUGHLY -4 C. FAULTS WERE LT IB SLAT 4 TEMP SENSOR R/R TEMP SENSOR IAW 30-11-02, NO HELP. R/R LT IB SLAT 4 WIRE HARNESS IAW MM 27-83-07-000-801 INSTALLED IAW AMM 27-83-07-416-801. OPS CHECK GOOD IAW AMM 27-80-00-710-801A (W512) OK FOR SVC.