As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UPON ARRIVAL TO GATE O2 DROP TO 0 PSI SERVICED O2 TO FULL 1900 PSI AT 24 DEGREES C. ACCOMPLISHED TSM TASK 35-10-00-810-813 LEAK CHECK OF LOW AND HIGH PRESS CIRCUITS HAD NO LEAKS. CHECKED ALL CONNECTIONS ARE THE CORRECT CONDITION. PRESSURE REMAINING AT 1900 PSI WITH CREW SUPPLY ON. OK FOR SERVICE PER TSM.