What was found
AIRFOIL ICE PROTECTION PRESSURE ABNORMAL LIGHT ILLUMINATED WITH WING AIRFOIL SYSTEM ANTI-ICE ACTIVATED. LIGHT EXTINGUISHED WITH TAIL ANTI-ICE ACTIVATED. AFTER CYCLE OF TAIL SYSTEM, THE LIGHT REILLUMINATED. FLIGHT DIVERTED TO ORD AND LANDED WITHOUT INCIDENT. REPLACED FORWARD ICE PROTECTION PRESSURE ABNORMAL SWITCH AND SUPPLY PRESSURE REGULATOR. ALSO, FOUND SLIP JOINT BETWEEN FIRST AND SECOND RIGHT WING SLATS OUT OF POSITION. RESECURED SLIP JOINT. OPERATIONAL CHECK OK ON GROUND. AIRCRAFT RETURNED TO SERVICE.