As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTED TOILET WOULD NOT FLUSH. FOUND MOTOR/PUMP ASSEMBLY LOCKED UP TIGHT. THIS IS A COMMON OCCURRENCE AS THE PUMP IMPELLER SWELLS AND JAMS IN THE PUMP HOUSING. NEED TO USE A MOTOR/PUMP ASSEMBLY THAT IS RESISTANT TO 'BLUE WATER'.