As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
POWER SUPPLY ASSEMBLY LEFT HAS FAULTED THE LAST TWO LEGS ASSOCIATED WITH RANDOM LAV SHUTDOWS. SUSPECT CONTROL POWER PROBLEM FOR LAVS, REF AMM 38-32-00 P55 (TOILET FLUSH BLOWER CONTROL). REPLACE POWER SUPPLY ASSEMBLY (LEFT) PER MM ITEM M24101 (PCN 566-9015). VERIFY ALL PARTS IN ONLINE IPC. REPLACED POWER SUPPLY UNIT PER MM. POWER SUPPLY ASSEMBLY LEFT HAS FAULTED THE LAST TWO LEGS ASSOCIATED WITH RANDOM LAV SHUTDOWNS.