As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
F/O'S OXYGEN HARNESS FAILS TO INFLATE (LEAKING). DOES NOT TEST CORRECTLY WHEN PRESS TO TEST IS PUSHED. [SUP 05-24-07] REPLACED FIRST OFFICER'S MASK WITH A NEW UNIT. AT REPAIR, MASK WAS FOUND TO HAVE A LEAKING AIR BLADDER INSIDE THE HARNESS.