As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
YELLOW BLINKER ON CAPTAINS OXYGEN MASK DOES NOT GO BACK WHEN TEST/RESET BUTTON IS PUSHED. FOUND CAPTAINS O2 MASK LEAKING FROM HOSE FITTING ON MASK. REMOVED AND REPLACED CAPTS O2 MASK IAW A319 AMM 35-12-41. LEAK CHECK OK. RFID INDUCTION C/W. (LP: 8027166). AIRCRAFT WAS GROUNDED