As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S OXYGEN MASK WILL NOT TEST. SWAPPED THIRD OCCUPANT OXYGEN MASK STOWAGE BOX WITH CAPTAIN`S O2 STOWAGE BOX IAW AMM. OPS CHECKED GOOD, OBSERVER SEAT OXYGEN MASK WOULD NOT TEST. PERFORMED OPS TEST ON OBSERVERS O2 MASK IAW AMM 35-12-41-710-001-A. NO DEFECTS NOTED. TEST OK AT THIS TIME.