As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORT: F-O O2 MASK INFLATABLE HARNESS LEAKING - NOTE: OBSERVER AND CAPT MASKS ARE GOOD. SWAPPED FO'S MASK WITH FIRST OBS MASK. FO'S MASK CHKS OK PER MM35-12-86. FIRST OBS SEAT INOP. REPLACED FIRST OBS SEAT MASK REF MM 35-12-86. AC OK FOR SERVICE.