As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT, RIGHT DUCT PRESSURE FLUCTUATES FROM 25 TO 50 PSI. CRUISE AND DESCENT PRESSURES ARE NORMAL. TIGHTENED FAN AIR TEMP SENSOR, INSPECTED PRSOV FILTERS IAW AMM 36-11-09. PERFORMED AIR SUPPLY BITE TEST IAW AMM 36-11-09. PRSOV TESTED GOOD IAW B767 AMM 36-11-09.