As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFT LAV SMOKE DETECTORS ACTIVATED DURING CLIMB AND SMOKE WAS APPARENT. NATURE OF PROBLEM, SMOKE IN CABIN. CAUSE OF SMOKE DETERMINED TO BE OIL LEAKING FROM APU OIL TANK AND INGESTED IN APU INLET. RENDERED APU INOP AND PERFORMED OPER 5088 FOR DUCT BURN OUT PROCEDURE. APU WILL NEED REPLACEMENT DUE TO LOCATION OF OIL LEAK.