As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW OXYGEN SYSTEM LOW. RECORD PRESSURE PRIOR TO SERVICING. SUSPECT PRE FLIGHT CHECKS. LEAK CHECKED O2 BOTTLES, MASK BOX. SUSPECT CAPTAINS O2 MASK. SWAPPED OBSERVERS MASK WITH CAPTAIN'S MASK. REPLACED OBSERVERS MASK WITH NEW MASK SERVICED O2 TO 1800 PSI. AC OK FOR SERVICE.