As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED A SMOKE TOILET MESSAGE ON APPROACH. MAINTENANCE COMPLIED WITH PINNACLE AIRLINES MINIMUM WORK SCOPE FOR SMOKE VISUAL OR INDICATION. MAINTENANCE FOUND SPEED TAPE FOR LAV VENT MISSING, RE-APPLIED TAPE IAW PA 21-009. MAINTENANCE PERFORMED MAX POWER RUNS FOR 30 MIN NO DEFECTS OR SMOKE NOTED.