As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUCT SPLIT IN CLIMB, EXCEEDED 20 PSI, DIFFERENTIAL L-N1 100.1 46 PSI, R N1 100.2 23 PSI. AFTER 10 MINUTES CRUISE AT FL 380 BOTH N1 89.7 BOTH 40 PSI. ACCOMPLISHED NR 2 ENG HEALTH CHECK IAW TASK CARD NG-36WC-00001. FOUND PRECOOLER CONTROL VALVE FAILED. R & R NR 2 ENG PRECOOLER CONTROL VALVE REF MM 36-12-02-400-801. LEAK AND OPS CHECK GOOD. PERFORMED ENG BLEED AIR CROSSOVER CHECK NO DUCT SPLIT NOTED AT 2 MIN HIGH POWER, REF MM 36-11-00-710-801.