As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLAP/SLAT ELECTRICAL STATUS MESSAGE ON EICAS. MESSAGE CLEARED AFTER RACKING M545 FSEU IAW FIM 27-51-00. MESSAGE COMES BACK AFTER CYCLE POWER. REPLACED FSEU M545 NO HELP, INSTALLED ORIGINAL FSEU. FOUND BAD FSEU FAULT RELAY K730, REPLACED K730 RELAY WDM 27-51-61 MESSAGE CLEARED. ACCOMPLISHED TEST PER AMM, OPS CHECKED GOOD.