What was found
LE SLAT ASYM EICAS MSG DISPLAYED DURING FLAP RETRACTION. RETURNED TO FIELD. SUPPLEMENTAL DATA UPDATE CAUSE: A BROKEN WIRE (401-002-20) IN THE SLAT SKEW SYSTEM SIMULATED A TRIPPED SLAT SKEW SWITCH INDICATING A SLAT SKEWED (ASYMMETRY) CONDITION. THE FLAP/SLAT ELECT UNIT (FSEU) RECEIVED THE SIGNAL SENSING A SKEWED CONDITION AND INITIATED SLAT/FLAP FAILURE PROTECTION SHUT DOWN AND ILLUMINATED THE AMBER 'LE SLAT' LIGHT AND 'LE SLAT ASYM' EICAS MESSAGE . CORRECTION: THE SUBJECT WIRE HARNESS WAS REPLACED. THE FLAP/SLAT SYSTEM WAS OPERATIONALLY CHECKED PER APPLICABLE MAINTENANCE MANUAL. ALL OPS CHECK NORMAL WITH NO REPORTED DISCREPANCIES.