What was found
PDIS 109 27-80 5999 09DEC20 DUB OPEN U LOGPAGES:371455. LEADING EDGE SLAT ASYM EICAS MESSAGE LIGHT WITH LEADING EDGE LIGHT FLAP GAUGE INDICATIONG BETWEEN 1 AND UP. NO CONTROL ISSUES NOTED INDICATED. POSITION PROPERLY ON EXTENSION PER QRH. SHGN 09DEC20 07:05 DUB U. ON BLOCK IN ALL LEADING EDGE DEVICES CORRECTLY STOWED. NO OBVIOUS ASYMMETRY. WILL CONTINUE T/S PER FIM. SHGN 09DEC20 08:23 DUB U FIM TASK 27-81 FAULT TREE 809. CARRIED OUT AND LEADING EDGE ASYM MESSAGE STILL PRESENT AFTER MAIN BATTERY CHARGER CHECK. MAIN BATTERY CHARGER REPLACEMENT REQUIRED, CONFIRMED IN STOCK, REPLACING NOW. SHGN 09DEC20 09:55 DUB U. FSEU SHOWN "LEADING EDGE OUTBOARD ASYM" & CODE 27-81021. CHECKING PSEU TO IDENTIFY FAULTY SENSOR. T/S C/O, IAW FIM 27-81 FT 809. SLAT NR 5 PROXIMITY SWITCH S280 FOUND OUT OF ADJUSTMENT. READJUSTED AND C/O BITE CHECKS OF PSEU AND FSEU, IAW AMM 27-88-01/201 AND FAULTS, ALL CLEARED. FUNCTION CHECK OF LEADING EDGE SLATS C/O, IAW AMM 27-88-00 WITH NO FAULTS NOTED. A/C OK FOR SERVICE