As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
TWO SUPERNUMERARY PORTABLE OXYGEN INOPERATIVE. PORTABLE OXYGEN DISPENSING UNITS (OR EQUIVALENT) (BOTTLE AND MASK) TRANSFER TO DMI 258432 PER MEL 35-31-01 CAT C. MX REPORTED BOTH BOTTLES ARE AT 1800. THEY ARE IN SERVICEABLE LIMITS IAW AMM 35-31-00-210-802. NO FURTHER DEFECTS NOTED. DMI 258432 CLOSED.