As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 419 - MEX-VSA - CREW REPORTED THE PRESENCE OF SMOKE IN THE PASSENGER CABIN AND SMOKE DETECTORS ACTIVATED IN THE LAVATORIES. LEFT A/C PACKAGE AND COOLING TURBINE CHIP DETECTOR WAS CHECKED, OK, IT WAS FOUND OIL WASTES FROM THE PNEUMATIC APU. (M)