As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 2926 - ON APPROACH INTO DTW, THE LAVATORY SMOKE DETECTOR ACTIVATED AFTER FUMES ENTERED THE CABIN AT REDUCED POWER SETTING, SELECTED BLEEDS OFF, DETECTOR STOPPED. MAINTENANCE FOUND RIGHT ENGINE TO BE SMELLING. REPLACED RIGHT CABIN P3 BLEED AIR CHECK VALVE. PERFORMED ENGINE RUNS. OPS CHECK GOOD. (M)