As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHIP 3115 DISC: DURING PREFLIGHT FOUND CAPT O2 MASK EMERG PR SELECTOR PTT BUTTON MISSING. SWAPPED ADDITIONAL OBS SEAT MASK WITH CAPTIANS MASK REF A319 AMM 35-12. PLACED OBS SEAT ON MEL 25-11-07 PLACARD INSTALLED M PROCEDURES COMPLIED WITH AC OK FOR SERVICE. R & R CAPTAINS 02 MASK IAW AMM 35-12. OPS NORM. THIS CLEARS MEL 25-11-07. PLACRDS REMOVED AND M PROCEDURES REVERSED. RFID COMPLETE. (LP: 9094022, AIRCRAFT WAS GROUNDED)