As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING SCHEDULED MM DEPLOYMENT OF THE PASSENGER OXYGEN MASKS WAS ATTEMPTED. THE CONTROLLER WAS SWITCHED TO THE OVERRIDE POSITION BUT ALL OF THE PASSENGER OXYGEN MASKS FAILED TO DEPLOY. UPON FURTHER INVESTIGATION IT WAS DISCOVERED THAT THERE WAS INSUFICIENT PRESSURE AT THE PASSENGER OXYGEN BOX SOLENOIDS TO DEPLOY THE MASKS. THE OXYGEN CONTROLLER WAS REPLACED AND THE SYSTEM WAS TESTED SERVICEABLE.