What was found
LE FLAPS TRANSIT LIGHT AT FL37000 AND SMOOTH WOULD NOT CLEAR POST NON NORMAL CHKLIST CHECKED INBOUND FLT DECK EFFECTS, FOUND MAINT MESSAGE 27-81220 LATCHED.IAW FIM 27-81 TASK 826. VERIFIED CB'S CLOSED. MAINT MESSAGE 27-51101 NOT PRESENT IN EXISTING FAULTS. PERFORMED RESISTANCE & INDUCTANCE MEASUREMENTS WITH AN LCR METER IAW AMM 27-88-11-760-801. FOUND RESISTANCE OF BLUE-YELLOW LEADS AT 354.72 OHMS, WHICH IS ABOVE LIMITS OF 351.50 OHMS. RED-YELLOW LEADS MEASURED AT 72.87 OHMS, WHICH IS LESS THAN 100 OHM LIMIT. CHKD INDUCTANCE OF FLAPS & SLATS IN RETRACTED, EXTENDED, & FULLY EXTENDED POSITIONS IAW AMM 27-88-11-760-801. ALL INDUCTANCE MEASUREMENTS WITHIN LIMITS OF 44.53MH AT RETRACTED, 35.73MH AT EXTENDED & FULLY EXTENDED POSITIONS. SUSPECT PROX SENSOR S172 IS AT FAULT. REPLACED PROX SENSOR S172, OPS CHKD GOOD IAW AMM 27-88-11-400-802 AND WDM 27-81-21-1 PG 1.