As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER T/O, LAV SMOKE DETECTOR WENT OFF. HOT BLEED AIR ODOR PRIOR TO IT GOING OFF. RAN THE ACFT AND TURNED THE BLEED AIR ON. FIRE DETECTOR IN LAVATORY DID NOT GO OFF. COULD NOT DUPLICATE, FIRE DETECT IN LAVATORY, OPS CHECKS GOOD. RETURNED TO SERVICE. NO PARTS REPLACED.