What was found
DURING CLIMBOUT DUCT PRESS LT 25, RT 45. AFTER LEVEL OFF LT DUCT PRESSURE STABILIZED TO 33 PSI. TOP OF DESCENT LT & RT DUCT EVEN AT 48. ACCOMPLISHED T/C NG-36WC-00001, BLEED SYS HEALTH CHECK. PRECOOLER VALVE FAILED, AND PRSOV FAILED TEST, NO OTHER DISCREPANCIES NOTED. R & R PRECOOLER VALVE REF MM 36-12-02, AND PRSOV REF MM 36-11-04. ACCOMPLISHED GROUND VERIFICATION WITH 2 MIN HIGH POWER RUN, AND BLEED SCHEDULE MM 36-00-00. NO DEFECTS NOTED.