As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBSERVER`S OXYGEN MASK PRESS TO TEST AND RESET BUTTON, OXYGEN DOES NOT STOP AND SHUTOFF, CATS EYE STAYS TELLOW , OXYGEN KEEPS FLOWING. REPLACED THE OXYGEN MASK STOWAGE BOX IAW AMM 35-11-15. OPS CHECKED GOOD. SERVICED THE CREW OXYGEN TO 1850 PSI IAW AMM 12-16-35.