As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CREW REPORTS STATUS MSG PFC INTERFACE AND FLAP SLAT CONTROL MSG 1. FOUND FSEU 1 BAD, NO PARTS AND OK TO DF. REPLACED FSEU 1, NO HELP. RE-INSTALLED ORIGINAL ONE BACK, WHEN DOING OPS CHK IT FAULTS MSG 27-20271 (FSEU 1 SENSOR EXCITATION IS LOW). NEEDS MORE TIME TO TS. T-S PER FIM 27-51-TASK 810 RPL'D FSEU. MSG'S CLEARED AND TEST NORMAL.