As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CRW REPORTED POSSIBLE O2 LEAK, DOWN TO 280 PSI. PERFORMED LEAK CHECK, FOUND FIRST OFFICERS FWD OXYGEN MASK STOWAGE BOX (10RN2) TO BE LEAKING TO THE MASK CONTINUOUSLY AFTER PUSHING PRESS TO TEST BUTTON. REMOVED AND REPLACED IN REF TO AMM 35-12-41-400-001-A, PERFORMED LEAK CHECK AFTER CHANGING PART & NO LEAKS DETECTED. SERVICED OXYGEN SYSTEM IAW AMM 12-14-35-600-001-A.