As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RETURNED & EMER DECLARED. LANDING WAS UNEVENTFUL, ACFT WAS OVERWEIGHT. DURING CLIMB FLAP INDICATOR MOVED UP BETWEEN 0 & 1. LE SLAT ASYMMETRY EICAS MSG GENERATED, OTBD SENSOR FAULT. IAW FIM 32-09-03-815-805, FOUND SENSOR S286 FAULTY. R & R S286 SENSOR IAW AMM 27-88-01-902-001. SYS CHECKED NORMAL.