What was found
FIRST OFFICER`S O2 MASK TUBE FAILED WHEN ATTEMPTED TO USE IN FLIGHT. FOUND INFLATION HARNESS DAMAGED ON MASK. REPLACED O2 MASK IAW AMM.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
FIRST OFFICER`S O2 MASK TUBE FAILED WHEN ATTEMPTED TO USE IN FLIGHT. FOUND INFLATION HARNESS DAMAGED ON MASK. REPLACED O2 MASK IAW AMM.