As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE DETECTORS AT STATIONS 214-215-219 SOUNDED DUE TO LIGHT OIL MIST IN THE CABIN, ALL 3 MID LAVS. THIS HAPPENS ONLY ON THE GROUND WITH APU AIR AND NO ENGS RUNNING. FWD APU TO MCO AND PLACARD PER MEL 49-11-01A. REPLACED APU PER M/M. LEAK CKS GOOD. GENERATOR CKS GOOD.