As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN PRESSURE ISSUE, RTFL FWD OUTFLOW ACTUATOR REPLACED. PER CREW OXYGEN PRESSURE INDICATION IS ERRATIC, FROM 0 TO 1820 PSI. VERIFIED DIRECT GAUGE READING AT TANK FULL. FLOW TO MASK NORMAL. POSSIBLE TRANSMITTER AT BOTTLE NEEDED. REPLACED TRANSDUCER. LEAK AND OPS CHECKS GOOD.