What was found
DURING TAKEOFF, THE AIRCRAFT WAS SLOW TO ACCELERATE AND A SLIGHT VIBRATION WAS EXPERIENCED. DURING CLIMB, A RUBBER SMOKE SMELL WAS DETECTED AFTER LANDING GEAR RETRACTION. AIRCRAFT DIVERTED TO ORD AND LANDED WITHOUT INCIDENT. FOUND NR 2 MAIN LANDING GEAR TIRE FLAT-SPOTTED AND FLAT, NR 1 MAIN LANDING GEAR TIRE FLAT-SPOTTED. REPLACED NR 1, NR 2 MAIN LANDING GEAR TIRES AND ANTI-SKID CONTROL BOX. OPERATIONAL CHECK GOOD.