As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CHECK OF PASSENGER OXYGEN SYSTEM IN MANUAL POSITION, PRESSURE ROSE TO 60 PSI AND OXYGEN MASKS WERE DEPLOYED THROUGHOUT THE CABIN. REPLACED THE PASSENGER OXYGEN BOTTLE AND REGULATOR, RE-STOWED ALL MASKS. OPERATIONAL CHECK NORMAL AND AIRCRAFT RETURNED TO SERVICE.