What was found
ON 9/6/2009 DURING THE TAKEOFF ROLL, CREW NOTICED THE MASTER WARNING LIGHT ILLUMINATED. CREW ABORTED THE TAKEOFF BELOW 80 KTS. ONCE CLEAR OF THE RUNWAY THE CREW DETERMINED THE SOURCE OF THE WARNING WAS THE OFFICE AREA SMOKE DETECTOR. FURTHER INVESTIGATION REVEALED THE SMOKE DETECTOR SENSOR HEAD COVER/CAP PN 2-3-275-0483 WAS SLIGHTLY DISLODGED FROM THE SMOKE DETECTOR UNIT PN 100-0649-2 THUS CAUSING THE FALSE WARNING. THE COVER WAS RESET IN ITS NORMAL POSITION AND THE FALSE WARNING CLEARED. THE FLIGHT CONTINUED, WITH NO FURTHER ANOMALIES.