What was found
INSPECTION TYPE: N/A ATB, EMERGENCY DECLARED. LANDED W/O INCIDENT, FAA NOTIFIED. ON CLIMBOUT, FLAPS 1 TO FLAPS UP "LEADING EDGE DISAGREE" EICAS. DID QRH PROCEDURE LEAD TO LE FLAP ASYMMETRY CHECKLIST. IDENTIFIED NR 1 FSEU WITH A CURRENT FAULT (UNIT ITSELF). REMOVED & REPLACED NR 1 FSEU AND NR 2 FSEU AS PRECAUTIONARY. IAW AMM 27-51-01-422-011/022-886 AND C/W TEST BITE PER 27-51-01-722-005 WITH SATISFACTORY NORMAL INDICATION & OPERATION NR 1 FSEU - P/N OFF 285N0011-40 P/N ON 285N0011-32, S/N OFF D02176 S.