A B757-200 on flight control check found binding ailerons at spoiler pick-up point and when released...

Attributes
ACN	678729
Time
Date	200511
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : zzz.airport
State Reference	US
Altitude	agl single value : 0
Environment
Flight Conditions	VMC
Aircraft 1
Operator	common carrier : air carrier
Make Model Name	B757-200
Operating Under FAR Part	Part 121
Flight Phase	ground : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Experience	flight time last 90 days : 100 flight time total : 14000 flight time type : 7500
ASRS Report	678729
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa other flight crewb
Resolutory Action	other
Consequence	other
Supplementary
Problem Areas	Maintenance Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

During taxi out for takeoff; while conducting flight control check; both pilots noticed significant binding when checking the ailerons. Additionally; at approximately 40-50% control wheel displacement; there was a significant increase in resistance and force required to obtain full aileron deflection; primarily to the right. The control wheel would also not return to neutral -- it would remain at about 20% deflection in either direction. Notified dispatch and maintenance. Returned to blocks. Aircraft removed from service by maintenance. Callback conversation with reporter revealed the following information: the reporter stated the yoke; when moved to the right or left with approximately 40% of deflection at the point where the spoilers pick up the aileron control; increased in resistance and the yoke would not return to center when released. The aircraft was returned to the gate and was taken OTS. The aircraft had a previous maintenance history and did have a spoiler control module recently replaced but the maintenance action taken on this report is unknown.

Original NASA ASRS Text

Title: A B757-200 ON FLT CTL CHK FOUND BINDING AILERONS AT SPOILER PICK-UP POINT AND WHEN RELEASED YOKE WOULD NOT RETURN TO CTR. ACFT HAD PREVIOUS HISTORY.

Narrative: DURING TAXI OUT FOR TKOF; WHILE CONDUCTING FLT CTL CHK; BOTH PLTS NOTICED SIGNIFICANT BINDING WHEN CHKING THE AILERONS. ADDITIONALLY; AT APPROX 40-50% CTL WHEEL DISPLACEMENT; THERE WAS A SIGNIFICANT INCREASE IN RESISTANCE AND FORCE REQUIRED TO OBTAIN FULL AILERON DEFLECTION; PRIMARILY TO THE R. THE CTL WHEEL WOULD ALSO NOT RETURN TO NEUTRAL -- IT WOULD REMAIN AT ABOUT 20% DEFLECTION IN EITHER DIRECTION. NOTIFIED DISPATCH AND MAINT. RETURNED TO BLOCKS. ACFT REMOVED FROM SVC BY MAINT. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE YOKE; WHEN MOVED TO THE R OR L WITH APPROX 40% OF DEFLECTION AT THE POINT WHERE THE SPOILERS PICK UP THE AILERON CTL; INCREASED IN RESISTANCE AND THE YOKE WOULD NOT RETURN TO CTR WHEN RELEASED. THE ACFT WAS RETURNED TO THE GATE AND WAS TAKEN OTS. THE ACFT HAD A PREVIOUS MAINT HISTORY AND DID HAVE A SPOILER CTL MODULE RECENTLY REPLACED BUT THE MAINT ACTION TAKEN ON THIS RPT IS UNKNOWN.

Data retrieved from NASA's ASRS site as of January 2009 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.

A B757-200 on flight control check found binding ailerons at spoiler pick-up point and when released yoke would not return to center. Aircraft had previous history.