As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW 02 CHECK. DUE TO REPETITIVE CREW 02 SERVICING WITH NO LEAKS ISOLATED ACCOMPLISH LEAK CHECK OF CREW 02 SYSTEM. REPLACED F/O 02 MASK BOX. FOUND TEST AND RESET SWITCH STUCK AND NOT WORKING. ALSO LEAKED CHECK LINES BELOW PILOT AND F/O 02 BOXES. NO LEAKS NOTED.