As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT DUCT PSI FLUCTUATES +-25 PSI ON CLIMB & DESCENT. ACCOMPLISHED AIR SUPPLY BITE MODULE PROC PER MM. RIGHT PRV FAULT INDICATED. REPLACED NR 2 ENG PRV PER MM & ACCOMPLISHED GRD RUN PER JRH, ALL OPS & INDS NOW NORMAL. AIR SUPPLY MODULE BITE PROC.