As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING LANDING FLAPS WOULD NOT MOVE FROM `15` POSITION WHEN SELECTED TO ANY OTHER POSITION. CREW DECLARED PAN PAN DUE TO NON-NORMAL FLAP SETTING ON LANDING. C/O FSEU BITE, IAW AMM 27-51 TASK 801 AND FOUND NO EXISITING FAULTS. FAULT HISTORY SHOWS FAULT CODE 27-52259 AND LT T/E FLAP SENSOR ON LEG 0. REPLACED LT FLAP POSITION TRANSMITTER IAW AMM 27-51 TASK 801. (TC# 20180404023).