As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAINS O2 MASK IS BROKEN. MASK WAS USED ENROUTE DUE TO FO USING BATHROOM. ONE OF THE WEBS THAT INFLATES IS BROKEN AND DOES NOT INFLATE. SWAPPED PN MF10-08-01 BETWEEN LEFT AND AFT POSITIONS. SN 102176I MOVED FROM LEFT TO AFT. SN SE20829I MOVES FROM AFT TO LEFT POSITION. ALL DONE IAW AMM 35-11-12. DEFERRED OBS O2 SYSTEM PER MEL 35-10-1. REMOVED AND REPLACED OBSERVER SEAT (COCKPIT) OXYGEN MASK IAW AMM 35-11-12. # 96184