As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CAPTAIN`S OXYGEN MASK QUICK DCN WOULDNT INFLATE HARNESS. SWAPPED CAPITAIN`S OXYGEN MASK WITH THE OBSERVER`S OXYGEN MASK IAW AMM 35-11-12. CAPITAIN`S MASK OPS CHECK NORMAL. R & R THE MASK FULL FACE IAW AMM 35- 11-12. OPS CHECK PERFORMED IAW AMM 35-10-00, OK FOR SERVICE.