What was found
NR 2 BLEED TRIP OFF ILLUMINATED AT CRUISE FLIGHT FL380, RAN QRH 2.4 AND PRESSED TRIP RESET SWITCH NR 2 BLEED TRIP OFF LIGHT EXTINGUISHED FOR DURATION OF FLIGHT. ACFT GROUNDED. ACCOMPLISHED FIM 36-10, TASK 801, STEP F. DETERMINED PRECOOLER CONTROL VALVE FAILURE ALONG WITH BLOWN DIAPHRAGM ON THE PRSOV. PRECOOLER CONTROL VALVE R & R, REF AMM 36-12-02. PRSOV R & R, REF AMM 36-11-04. ALL LEAK CHECKS & OPS CHECKS GOOD. ACCOMPLISHED BLEED TRIP OFF LIGHT REPAIR CONFIRMATION, REF FIM 36-10, TASK 801, PARAGRAPH 15 A THRU I , OPS CHECK NORMAL.