As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
A/C DUCT PRESSURE DIFF AT CRUISE RT 15 PSI (STEADY) LT 35-40 PSI (FLUCTUATING) FL 360. RT ENGINE PRECOOLER CONTROL VALVE FAILED STEP F.(5) (C) OF FIM TASK 36-10, TASK 810. ACCOMPLISHED QUICK FIM TASK 36-10 TASK 810. R & R NR 2 ENG PRE COOLER CONTROL VALVE REF MM 36-12-02-000-801 AND MM 36-12-02-400-801. OPS AND LEAK CHECKS GOOD. PERFORMED ENGINE BLEED AIR CROSSOVER OPS TEST REF MM 36-11-00-710-801. OPS CHECK GOOD.