What was found
LEVELING FL390 RT BLEED TRIP OFF LIGHT ILLUMINATED BLEED RESET WITH TRIP RESET IAW QRH. CRUISE LT PRESS 39 PSI, RT PRESS 31 PSI, RT BLEED TRIP OFF LIGHT ILLUMINATED SECOND TIME DURING TOP OF DESCENT 90 N2 80 N1. BLEED RESET WITH TRIP RESET. NO WING OR ENGINE ANTI ICE USED DURING FLIGHT. ACFT GROUNDED. ACCOMPLISHED NR 2 ENG BLEED AIR SYS HEALTH CHECK REF T/C NG-36WC-00001. FOUND NR 2 ENG PRECOOLER CONTROL VALVE OPENING PRESSURE TOO LOW. R & R NR 2 ENG PRECOOLER CONTROL VALVE REF MM 36-12-02-400-801. ACCOMPLISHED ENG BLEED AIR CROSSOVER OPS TEST REF MM 36-11-00-710-801. OPS NORMAL.