What was found
NR1 BLEED TRIP OFF AT 41,000, CRUISE, RESET, AND THEN TRIPPED AGAIN, WOULD NOT RESET. ACFT GROUNDED. ACCOMPLISHED NR1 ENGINE BLEED AIR SYS HEALTH CHECK. NR 1 ENG PRECOOLER CONTROL VALVE FAILED HEATH CHECK REF TASK CARD NG-36WC-00001 STEP 03.F.6. R & R NR1 ENG PRECOOLER CONTROL VALVE REF MM TASKS 36-12-02-000-801. LEAK & OPS CHECK GOOD. NR 1 ENG HIGH STAGE VALVE FAILED HEALTH CHECK REF TASK CARD NG-36WC-00001. STEP 04.K.(3).(C). R & R NR 1 ENG HIGH STAGE VALVE REF MM TASK 36-11-06-000-801. LEAK AND OPS CHECK GOOD. VERIFICATION FLIGHT SATISFACTORY.