As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MX LEFT THE PASSENGER OXYGEN KNOB TO OFF. WHEN I ROTATED THE PASS OXY KNOB TO AUTO ALL THE MASKS DEPLOYED. REPACKED PASSENGER OXYGEN MASK WORK DONE REF. CESSNA CE-680 AMM 35-20-00. NO FURTHER DEFECTS NOTED. VERIFIED OXYGEN LEVEL IS STILL GOOD.