An emb-190 first officer detected a stiff and displaced yoke during the pre taxi aileron/spoiler fli...

Narrative:

After pushback and engine start; we proceeded to do the required flight control check before taxiing out for takeoff. First officer let me know that the flight controls felt stiff and they were not returning to the neutral position. We both did the flight control check for the ailerons. Both control columns did not return to the neutral position in neither directions and the ailerons and spoilers did showed displaced on the EICAS page.I called our dispatcher and we did a conference call with maintenance control. Maintenance control asked me to do some troubleshooting to see if it would help the situation. After following what I was asked to do; the problem did not corrected itself. Maintenance control told me to return to the gate. Our dispatcher said he would notify [destination] ops.first officer contacted operations for a gate assignment. We returned back to the gate and passengers deplaned. I explained to the mechanics what was wrong with the aircraft. One thing that the mechanics did showed me was that after they disconnected the ailerons using the emergency aileron roll disconnect handle in the cockpit; they had no roll control using the first officer control column. After about an hour; the flight was canceled.

Original NASA ASRS Text

Title: An EMB-190 First Officer detected a stiff and displaced yoke during the pre taxi aileron/spoiler flight control check. After returning to the gate; Maintenance used the emergency aileron disconnect handle which resulted in the complete disconnect of the First Officer's yoke roll control.

Narrative: After pushback and engine start; we proceeded to do the required flight control check before taxiing out for takeoff. FO let me know that the flight controls felt stiff and they were not returning to the neutral position. We both did the flight control check for the ailerons. Both control columns did not return to the neutral position in neither directions and the ailerons and spoilers did showed displaced on the EICAS page.I called our dispatcher and we did a conference call with Maintenance Control. Maintenance Control asked me to do some troubleshooting to see if it would help the situation. After following what I was asked to do; the problem did not corrected itself. Maintenance Control told me to return to the gate. Our dispatcher said he would notify [destination] Ops.FO contacted Operations for a gate assignment. We returned back to the gate and passengers deplaned. I explained to the mechanics what was wrong with the aircraft. One thing that the mechanics did showed me was that after they disconnected the ailerons using the emergency aileron roll disconnect handle in the cockpit; they had no roll control using the FO control column. After about an hour; the flight was canceled.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.

Attributes
ACN	1317273
Time
Date	201512
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	EMB ERJ 190/195 ER/LR
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Aeroplane Flight Control
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

An emb-190 first officer detected a stiff and displaced yoke during the pre taxi aileron/spoiler flight control check. After returning to the gate; maintenance used the emergency aileron disconnect handle which resulted in the complete disconnect of the first officer's yoke roll control.