As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE FLAP TRANSIT LIGHT ILLUMINATED IN CRUISE FLT ALONG WITH A NR 3 LE SLAT LIGHT ON OVERHEAD PANEL. FOUND SLAT NR 3 OTBD SENSOR FAULT. REPLACED NR 3 SENSOR S998 IAW AMM 27-88-11-401-801 & OPERATIONS TEST IAW AMM 27-88-11-700-801, TEST PASSED.