As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
WHILE PERFORMING MCM 5414, THE PASSENGER O2 MASKS FAILED TO DEPLOY ON RIGHT SIDE OF PASSENGER CABIN. ALSO CIRCUIT BREAKER K34 (PASSENGER OXYGEN RELEASE) AND CIRCUIT BREAKER L34 (ALTERNATE RELEASE) WERE POPPED, FOUND SOLENOID LATCHING MECHANISM ABOVE SEAT 3E TO BE CAUSING BREAKERS TO POP. REMOVED AND REPLACED LATCHING MECHANISM.