What was found
AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: ENROUTE SHORTLY AFTER TRIMMING THE AIRCRAFT, THE YOKE WAS TILTED RIGHT AND REQUIRED RETRIMMING AGAIN. SHORTLY AFTER THIS THE CREW NOTICED A FLAP ASYMMETRY. FLAP HANDLE UP, FLAP INDICATOR WAS SPLIT BETWEEN UP AND 1. RIGHT FLAP LOWER THAN LEFT. AIRCRAFT DECLARED EMERGENCY AND LANDED SAFELY AT ORD. REMOVED AND REPLACED NUMBER 7 FLAP DRIVE SKEW SENSOR, PER AMM 27-59-01, OPERATIONAL CHECK GOOD, ALL LEVER, FLAP, AND SKEW POSITIONS IN RANGE PER AMM 27-59-00-730-801. NO FAULTS FOUND DURING SYSTEM TEST.