What was found
AIRCRAFT WAS GROUNDED: PILOT DECLARED EMERGENCY INBOUND TO ORD ON ACCOUNT OF FLIGHT CONTROL ISSUES. FLIGHT LANDED WITHOUT INCIDENT. ON APPROACH, NO FLAPS, NO SLATS. RAN CHECKLIST. USED ALT FLAPS SWITCH GOT LEADING EDGE SLATS. DID NO FLAP LANDING. 188-190 TOUCHDOWN SPEED MAINTENANCE REPORTS LAST LEG FAULTED FLAP SKEW PROBLEM ON FSEU, MESSAGE 27-53258. FOUND #5 SKEW SENSOR OUT OF LIMITS. REPLACED IAW AMM 27-59-01. SYSTEM CHECKS NORMAL.