As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, THERE WAS A LARGE SPLIT BETWEEN DUCT PRESSURE INDICATIONS-LT-35 & RT-19 PSI. ALL OPS WERE OTHER WISE NORMAL AND PRESSURES WERE EQUAL DURING CRUISE. REMOVED PRSOV ON ENGINE NR 2. REPLACED RT PRSOV IAW MM 36-11-09. RAN ENGINE ON HIGH POWER IAW MM 77-00-00. LEAK & OPS CHECKED GOOD. OK FOR SERVICE.