What was found
CONTROL WHEEL HAS SPONGY RESISTANCE JUST PRIOR TO LEFT HARDSTOP. REMOVED FROM SERVICE. RFORMED AILERON CONTROL SYSTEM OPERATIONAL TEST REF AMM TASK 27-10-00-710-801-A. NOTED BOTH CONTROL YOKES HAVE MORE SPONGY RESISTANCE PRIOR TO HARDSTOPS ON LEFT DEFLECTIONS THAN RIGHT. INSTALLED WING AIRLERON CIRCUIT RIG PINS AT L/H AND R/H CONTROL STUBS AND WING SECTORS, PINS GO IN SMOOTHLY, REF AMM TASK 27-11-03-720-802-A. REMOVED RIG PINS. DISCONNECTED AILERON FEEL UNIT TO L/H TORQUE TUBE REFERENCE E175 AMM TASK 27-11-05-000-801-A, PARA. 1-8B. WITH FEEL UNIT DISCONNECTED L/H YOKE DEFLECTION ISSUE NO HELP, SPONGY STOP REMAINS THE SAME. RE-CONNECTED AILERON FEEL UNIT TO L/H TORQUE TUBE REF. E175 AMM TASK 27-11-05-400-801-A. PARA. 1-8, 9L-10G. FEEL UNIT OPS CHECK GOOD, BUT ORIGINAL ISSUE REMAINS. PERFORMED CONTROL YOKE MECHANCAL STOPS ADJUSTMENT REF E175 AMM TASK 27-11-01-820-801-A. VALUES WERE GOOD, NO ADJUSTMENTS REQUIRED. PERFORMED AILERON POWER CONTROL UNIT RIGGING REF. E175 TASK 27-12-01-820-801-A. SPONGY STOP DURING LEFT YOKE DEFLECTIONS NO LONGER PRESENT AFTER PCU'S RIGGED. PERFORMED AILERON CONTROL SYSTEM OPERATIONAL TEST REF E175 AMM TASK 27-10-00-710-801-A, OPS CHECK GOOD. COMPLETED FREEDOM OF MOVEMENT CHECK, ENSURED FULL TRAVEL AND VERIFIED PROPER DIRECTION OF MOVEMENT. NO DEFECTS NOTED PER GPM 9.2 (FREEDOM OF MOVEMENT CHECK) RETURNED TO SERVICE.