As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SLAT ASYM EICAS MESSAGE, AIRCRAFT RETURNED TO BLOCK AND GROUNDED. PERFORMED PSEU BITE TEST PER B767 FIM 32-09, FAULT TREE 803 AND FOUND CODE 286 (NR 5 INBOARD SLAT FAR). ACCOMPLISHED A DETAILED VISUAL INSPECTION ON L/E SLAT SYSTEM AND COMPONENTS AND FOUND NR 5 SLAT INBOARD PROX SENSOR AND TARGET DAMAGE. REMOVED AND REPLACED NR 5 SLAT INBOARD PROX SENSOR AND TARGET PER B767 AMM 27-88-01, OPS CHECK SATISFACTORY. NO EICAS MESSAGE AT THIS TIME.