As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LEADING EDGE SLAT ASYMMETRY EICAS DISPLAYED. ACCOMPLISHED APPROPRIATE FAULT ISOLATION MANUAL, AND AIRCRAFT MAINTENANCE MANUAL PROCEDURES. BITE TESTED THE FSEU, AND PSEU, INSPECTED ALL TARGETS. OPERATED THE FLAPS ELECTRICALLY AND HYDRAULICALLY. NO FAULTS FOUND UNABLE TO DUPLICATE INTERMITTENT EICAS MESSAGE.