As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING FLAP CLEAN UP AFTER TAKEOFF, LEADING EDGE FLAP DISAGREE EICAS MESSAGE AT FLAPS UP. QRH CHECKLIST COMPLETED, EMERGENCY DECLARED AND LANDED WITHOUT FURTHER INCIDENT. THE AIRCRAFT WAS GROUNDED. REPLACED FSEU IAW AMM 27-51-01. OPS CHECKED GOOD. ACCOMPLISHED PSEU BITE IAW FIM 32-09-00. ALL TESTS PASSED.