As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING APPROACH WITH ENGINE AND WING ANTI-ICE ON, F/A REPORTED BOTH AFT SMOKE DETECTORS ACTIVATED. F/A REPORTED SHE SMELLED A BURNING ODOR JUST BEFORE SMOKE DETECTOR ACTIVATED. FIRST OFFICER ALSO NOTED BURNING ODOR FROM HIS VENT . SELECTED WING ANTI -ICE OFF AND SMOKE DETECTOR WENT SILENT AFTER ABOUT 2 MINS. APU INLET CONTAMINATION SUSPECTED. NO OTHER TROUBLE FOUND. CLEANED APU INLET AND PERFORMED DUCT BURN.