As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMBOUT, AFT LAV SMOKE DETECTOR SOUNDED AND SMOKE AND ODOR DETECTED BY FLT. ATTENDENTS. AIRCRAFT RETURNED TO YUL. CONTRACT MTC FOUND OIL LEAKING FROM APU INLET, SUBMITTER SUSPECTS BEARING FAILURE. MTC IN PROCESS OF CLEANING APU COMPARTMENT CHANGING WATER SEPARATOR BAGS AND DUCT BURNOUT.