What was found
BLEED TRIP OFF ON ROTATION. RAN QRH ONCE CLEANED UP. BLEED RESET MOMENTARILY THEN TRIPPED AGAIN. RIGHT BLEED PSI INDICATED EQUAL 0 DURING BLEED TRIP. GROUNDED - YES. AIR TURNBACK - PERFORMED ENGINE BLEED HEALTH CHECK PER AMM 36-11-00, HEALTH CHECK GOOD. PERFORMED PRECOOLER CONTROL VALVE SYSTEM HEALTH CHECK REF AMM 36-11-00, FOUND PRECOOLER VALVE OVERPRESSURED. REMOVED AND REPLACED PRECOOLER CONTROL VALVE REF AMM 36-12-02, OPS CHECK GOOD. ACCOMPLISHED NR 2 ENGINE BLEED AIR OPS TEST PER AMM 36-11-00-710-801. GROUND VERIFICATION REPAIR CONFIRMATION SUCCESSFUL REFERENCE FIM 36-10 TASK 801.