What was found
FWD LAVATORY FIRE ALARM ACTIVATED IN FLT, NO FIRE, FUMES, OR SMOKE. CIRCUIT BREAKER PULLED. AFFECTED LAV IS 1A-1L (FWD LEFT). SMOKE DETECTOR TEST OK. FIRE EXTINGUSHER HAS MELTED TIPS AND REQUIRES REPLACEMENT IAW FIM 26-13, FAULT TREE 806. LAVATORY SMOKE DETECTION AND FIRE PROTECTION PROBLEMS. GREEN POWER LIGHT ON LAV FIRE DETECTOR OK. SELF TEST SWITCH ON THE SMOKE DETECTOR OK. RED ALARM LIGHT ON THE SMOKE DETECTOR DOES COME ON AND THE SMOKE DETECTOR ALARM IS HORN HEARD. ATTENDANT CALL LIGHT IN THE PASSENGER COMPARTMENT FLASHES & PAX CABIN CALL CHIME HEARD INTERMITTENTLY. OPS CHK OF THE LAV DETECTOR & ASSOCIATED WARNINGS OK. NO FAULTS FOUND ON LAV FIRE DETECTION SYS. IAW FIM 26-13 806. R & R THE LAV 1A-1L FIRE EXTINGUISHER BOTTLE. REPLACED TRASH TEMP INDICATOR. IAW AMM 26-24-01. NO FURTHER EVIDENCE OF FIRE OR SMOKE DETECTED IN LAV OR VICINITY. ALL OPS CHKS OF DETECTOR OK. RETURNED CB'S AND FLIGHT DECK TO NORMAL IAW FIM 26-13 806.