What was found
ON TAKEOFF AT 500FT AGL THE RIGHT BLEED TRIP OFF LT CAME ON. OAT +19 ENG. + WING ANTI ICE WAS ON FOR TAKEOFF. WHEN LT CAME ON ONLY ENG ANTI ICE ON. RAN CHECKLIST LT WENT OUT (BLEED TRIP OFF). DUCT PSI AT CRUISE RT 30 PSI LFT 46 PSI WHILE CHANGING ALTITUDE FROM 34,000 TO 36,000 AT LEVEL OFF RIGHT BLEED TRIP OFF LIGHT CAME BACK ON. N1 SETTING WAS ABOUT THE SAME AS TAKEOFF N 96 PERCENT N1 RAN CHECKLIST LIGHT WENT OUT. PERFORMED ENGINE BLEED AIR SYSTEM LEAK CHECK USING APU REF 36 11 00 700 802 NFF. LEAK CHECK OF PCCV SENSE LINES NO LEAK FOUND PRECAUTIONARY REPLACED PRECOOLER CONTROL VALVE AND PCCV SENSOR. PERFORMED POWER RUN AT 95.0 N1 FOR 10 MIN. ALL SYS OPS NORMAL NFF. DUCT PRESS NEAR NORMAL GROUND VERIFICATION SUCCESSFUL.