What was found
BLEED PRESSURE AND TEMP HIGH WARNING MESSAGE ILLUMINATED ON TAKEOFF ROLL. PERFORMED ENGINE RUNS FOR OPS CHECK, WITH ECS SYS ON APU, RAN LT ENGINE & RT ENGINE NOTING NO MESSAGES, INSPECTED PRECOOLERS FOR DAMAGE AND BLOCKAGE NOTING NO FAULTS, INSPECTED PRECOOLER BY PASS VALVE INDICATOR WITH NO FAULTS NOTED. INSPECTED PRECOOLER TEMP SENSOR NOTING NO FAULTS, REF MM 21.00-00.