As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
B737-26-3-0947, LAV E SMOKE DETECTOR SENSOR IS DIRTY. SPECIAL DI FFICULTY REPORT (SDR) IS REQUIRED. RECEIVED SERVICABLE SMOKE DETECTOR AND REINSTALLED AT LAV E IAW B737 AMM 26-14-01-400-802 TASK 5 P/N ON 475571-2 S/N TRB9170 OPS CHECK GOOD.