What was found
L-1 AND R-4 LAV SMOKE DETECTORS GOING OFF IN FLIGHT. PERFORMED T/S AND SYSTEM OPS CHECK AS PER FIM 26-13-00 FIG 103 AND AMM 26-13-00. L-1 LAV SMOKE DETECTOR SYSTEM OPS CHECKS NORMAL. TRANSFERRED R-4 LAV SMOKE DETECTOR SYSTEM INOP ITEM TO L/P 73139 ITEM 3M FOR DEFERRAL. OPENED CI-26-01 MEL 26-26-3 1-23-10 DISCREPANCY - R-4 LAV SMOKE DETECTOR SYSTEM INOP. LAV SECURED / LOCKED CLOSED PLACARDED INOP - DO NOT ENTER, LAV WASTE RECEPTACLE CONFIRMED EMPTY (DUE TO DETECTOR GOING OFF CONNECTOR DISCONNECTED AND STOWED). DATE:1/25/10 REF CI 26-01, R-4 LAV SMOKE DETECTOR INOP. REPLACED R-4 LAV SMOKE DETECTOR PER AMM 26-13-01, OPS OK.