As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CRUISE THE TAKEOFF CONFIGURATION LIGHT TURNED ON & TAKEOFF WARNING HORN SOUNDED. PERFORMED TAKEOFF WARNING SYS TEST IAW AMM 31-51-00-730-803 & FIM 31-51 TASKS 803 STEP E & 822 STEP B PROCEDURES, SHOWING FAILURE CODE 31-53010. SO THE FIM 32-09 TASK 812 STEP A 2 H PROCEDURE, BITE TO FSEU IAW FIM 27-51 TASK 801 PROCEDURE & FIM 32-09 TASK 801 PROCEDURE WERE PERFORMED, NOT SHOWING FAILURE CODE & NO FAILURE WAS FOUND. AS A PRECAUTIONARY ACTION, THE PSEU WAS REPLACED IAW AMM 31-51-00, TESTED CORRECT.