As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
*EMERGENCY DECLARED FOR LANDING* CLMG THRU FL290 LE FLAPS TRANSIT LGT ILLUMINATED RAN QRH. LGT ST ILL ON CONTINUED QRH PROCEDURE ACCOMPLISHED FIM 27-51 TASK 801 FSEU BITE. FAULT F4 PROX EXTEND CODE 27-81223 LATCHED. COTINUED WITH FIM 27-88 TASK 805. SENSOR READS NEAR WHILE SHOULD READ FAR DURING I/O TEST. REPLACED S175 EXTEND SENSOR. GROUND TEST OK. REF AMM 27-88-11.