What was found
BLEED TRIP OFF LIGHT COMES ON DURING CRUISE LIGHT NO. 1 RAN QRH LIGHT CAME BACK ON. PERFORMED NO.1 ENGINE BLEED AIR SYSTEM HEALTH CHECK, RESULT NO DEFECT FOUND IAW AMM TASK 36-11-00-700-801. REMOVED AND REPLACED #1 ENG PRECOOLER CONTROL VALVE IAW AMM 36-12-02 AND #1 ENG PRECOOLER CONTROL VALVE SENSOR IAW AMM 36-12-03. INSTALLATION AND LEAK TESTS GOOD. OPERATED BOTH ENGINE PER MM 36-00-00-860-804, OPS CHKS GOOD. NO BLEED TRIP OR DUCT SPLIT NOTED. OK FOR SERVICE. ADD EMP:U274351