As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE TOILET CAUTION ON FINAL APPROACH AFTER SWITCHING BLEEDS TO APU. SMELLED STRONG FUMES IN COCKPIT. SWITCHED BLEEDS BACK TO ENGINES AND MSG WENT AWAY A COUPLE MINUTES LATER. PASSENGERS SMELLED FUMES AND SAW SMOKE IN CABIN. (FLT#5587) FO: 12/07/2018 CLOSED DEFERRED APU FUEL CONTROL/SOLENOID IAW MEL.