As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
OBSERVERS OXYGEN MASK INFLATABLE STRAP DOES NOT INFLATE. OBSERVERS OXYGEN SYS PLACED ON MEL IAW MEL 35-10-1. MM02 UPDATED, PLACARD INSTALLED, CAT A. R & R OBSERVERS 02 MASK IAW AMM 35-11-12. OPERATIONS CHECKED GOOD. PLACARD REMOVED. PN ON & OFF MF10-08-01, SN OFF SE19195, SN ON 1090391. REMOVED FROM MMO2.