As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEFT AND RIGHT DUCT PRESSURE SPLIT R-DUCT PRESSURE 10-15 PSI LOWER THAN L DUCT AT CRUISE. REMOVED AND REPLACED PRSOV, AND HP REGULATOR. PERFORMED BLEED AIR CHECK PER FIM 36-10-00-810-804, L/R BLEED PRESS`S MATCH AT ALL TESTED N1 SPEEDS. (M)