As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON DEPARTURE FORWARD LAV SMOKE ALARM. RETURNED TO FIELD. LANDING UNEVENTFUL. REMOVED FROM SERVICE. C/W Q400 FIM 26-12-11-810-801. AS A PRECAUTIONARY R+R SMOKE DETECTOR REF Q400 AMM 26-12-11-000-801, 26-12-11-400-802. OPS CHECK GOOD REF Q400 AMM 26-12-11-710-804. AIRCRAFT RETURNED TO SERVICE.