As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LAVATORY SMOKE DETECTOR WENT OFF DURING AIRCRAFT PUSHBACK. NO REPORT OF EITHER VISUAL SMOKE OR SMOKE ODOR. FOUND APU TURBINE WET WITH OIL. OPENED MEL 49-01, LAV SMOKE DETECTOR. OPERATIONAL CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE. (M)