What was found
AIRCRAFT WAS GROUNDED: PILOT ABORTED TAKEOFF AT APPROXIMATELY 120 KNOTS ON ACCOUNT OF TAKEOFF CONFIG LIGHT AND ALARM-RTO NORMAL TAXIED. MAINTENANCE REPORTS IAW FIM 31-51-00-810-803 FAULT CODE 31-53010 LE FLAPS NOT EXTENDED. IAW FIM 32-09-00-810-812 PARA F PERFORMED FSEU EXISTING FAULTS, FOUND FAULT CODE 27-81218 F2 PROX RETRACT. PERFORMED FIM 27-88-00-810-805 FOUND RETRACT PROX SENSOR S170 OUT OF TOLERANCE AT 374 OHMS (MAX 361). REPLACED LT LEADING EDGE FLAP SENSOR S170. SYS OPS CHECK GOOD IAW AMM 27-88-11-400-802.