As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER`S OXYGEN MASK HAS LEAK & DOESN'T EXPAND FOR PROPER FIT AROUND HEAD. SWAPPED FIRST OFFICER`S WITH FIRST OBSERVER`S. FIRST OFFICERS` OPERATIONS CHECKED GOOD. DEFERRED STICKER FIRST OBSERVER`S SEAT INOPERATIVE. REPLACED FIRST OBSERVER`S MASK IAW MM.