As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ACFT EXPERIENCED EXCESSIVE 02 LOSS FROM CREW O2 SYS. MX FOUND THE O2 BOTTLE REGULATOR/VALVE ASSY LEAKING. ALSO FOUND THAT WITH THE REGULATOR VALVE IN THE OFF POSITION, OXYGEN WAS STILL LEAKING OUT THE LOW PRESSURE PORT FEEDING THE CREW'S O2 SYS.