As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING EMERGENCY DECENT THE CAPTAIN USED THE OXYGEN MASK. DURING THE REMOVAL OF THE MASK FROM THE STOWED POSITION, THE HARNESS INFLATION CENTRAL VALVE & OXYGEN SUPPLY CONTROL KNOB SEPARATED FROM THE MASK. THIS LEFT THE MASK HARNESS CONTINUALLY INFLATED REQUIRING THE PILOT TO HOLD THE MASK TO HIS FACE DURING USE. RESOLUTION CAPT`S OXYGEN MASK REPLACED IAW AMM 35-10-10. CHECKS SERVICEABLE.