As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT DUCT PRESSURE INDICATORS WERE DISCREPANT BY 20 PSI (RGT=18PSI & LT=38PSI). IN CRUISE AT FL 360 DISCREPENCY WAS 14 PSI (RGT=22 PSI & LT=36 PSI). ACFT GROUNDED. ACCOMPLISHED TASK CARD NG-36WC-00001. FOUND PRSOV AND PRECOOLER CONTROL VALVE BAD. R & R PRSOV. REF AMM 36-11-04-400-801. LEAK CHECKED GOOD. R & R PRECOOLER VALVE. REF AMM 36-12-02-400-801. LEAK CHECKED GOOD. REPAIR CONFIMATION GROUND RUN GOOD IAW FIM 36-10-00-810-804.