As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE AND FUMES COMING FROM FWD LAV. SECURED WATER HEATER AND FLUSH MOTOR, SMOKE AND FUMES IMMEDIATELY DISSIPATED. AIRCRAFT WAS ON APPROACH INTO PHX. MAINTENANCE ACTION TROUBLESHOOTING FOUND FWD ENTRY LIGHT BRIGHT C/B POPPED AND WOULD NOT RESET. FOUND BAD ENTRY LIGHT BALLAST. REPLACED BALLAST, OPERATIONAL CHECKS OK.