What was found
FWD ENTRY DOOR LIGHT ILLUMINATED ON TAKEOFF REJECT INITIATED AT 110 KTS AS PER INBOUND CREW GROSS WEIGHT 170.800 LBS. BRAKES ON SPEED 110KNOTS. PRESSURE ALT 200FT. OAT 44C. RTO SELECTED FOR STOPPING A/C. THRUST REVERSERS WERE USED. TAXI FROM A/C STOP TO GATE APROX 1 MILE. NO TAIL WIND. HEAD WIND NEGLIGIBLE. STATUS MESSAGE NOT FOUND. CYCLED FWD DOOR SEVERAL TIMES AND LIGHT INDICATION WORKED. REQUIRES FURTHER T/S REF AMM 05-51-07-210-801. FOUND FWD ENTRY DOOR PROXIMITY SENSOR LOOSE AND TARGET OUT OF RANGE. SECURED SENOR AND ADJUSTED TARGET AS PER AMM 52-71-11-820-801. SYSTEM OPS CHECK GOOD. OK TO CONTINUE.