A CL65 flight crew had to return land with displaced ailerons at cvg, ky.

Attributes
ACN	484120
Time
Date	200009
Day	Fri
Local Time Of Day	1201 To 1800
Place
State Reference	TN
Altitude	msl single value : 26000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zid.artcc
Operator	common carrier : air carrier
Make Model Name	Regional Jet CL65, Undifferentiated or Other Model
Operating Under FAR Part	Part 121
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 250 flight time total : 9500 flight time type : 2000
ASRS Report	484120
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : instrument pilot : multi engine pilot : cfi pilot : commercial
Experience	flight time last 90 days : 150 flight time total : 2955 flight time type : 1092
ASRS Report	484129
Events
Anomaly	aircraft equipment problem : critical maintenance problem : improper documentation maintenance problem : improper maintenance other anomaly other
Independent Detector	aircraft equipment other aircraft equipment : aileron comparator other flight crewa
Resolutory Action	flight crew : landed as precaution other
Consequence	other other other
Supplementary
Problem Areas	Flight Crew Human Performance Maintenance Human Performance Aircraft
Primary Problem	Aircraft

Narrative:

During the flight gsp-cvg this crew observed the illumination of the aileron comparator. We called avionics in the belief that this was an issue with the autoplt. A maintenance write-up was made, and the autoplt was deferred by avionics. En route to clt on the next leg, we noticed that an excessive amount of aileron trim was required to hold level flight. We returned to cvg and made a new write-up for maintenance to reflect this discrepancy. We then left the aircraft with maintenance. Supplemental information from acn 484129: a caution message indicating left wing down occurred several times when making left hand turns with the autoplt engaged. We followed the procedures in the QRH which directed us to disconnect the autoplt, retrim the aircraft, and then reengage the autoplt. This problem occurred multiple times so it was written up upon arrival at cvg. Maintenance deferred the autoplt and stated to see how the airplane flies without the autoplt. On the next flight en route to clt, excessive left aileron trim was needed to keep the airplane from rolling right. Maintenance was consulted and we returned to cvg. Maintenance later found the right aileron had slop with the hydraulics on (1/8 inch play).

Original NASA ASRS Text

Title: A CL65 FLC HAD TO RETURN LAND WITH DISPLACED AILERONS AT CVG, KY.

Narrative: DURING THE FLT GSP-CVG THIS CREW OBSERVED THE ILLUMINATION OF THE AILERON COMPARATOR. WE CALLED AVIONICS IN THE BELIEF THAT THIS WAS AN ISSUE WITH THE AUTOPLT. A MAINT WRITE-UP WAS MADE, AND THE AUTOPLT WAS DEFERRED BY AVIONICS. ENRTE TO CLT ON THE NEXT LEG, WE NOTICED THAT AN EXCESSIVE AMOUNT OF AILERON TRIM WAS REQUIRED TO HOLD LEVEL FLT. WE RETURNED TO CVG AND MADE A NEW WRITE-UP FOR MAINT TO REFLECT THIS DISCREPANCY. WE THEN LEFT THE ACFT WITH MAINT. SUPPLEMENTAL INFO FROM ACN 484129: A CAUTION MESSAGE INDICATING L WING DOWN OCCURRED SEVERAL TIMES WHEN MAKING L HAND TURNS WITH THE AUTOPLT ENGAGED. WE FOLLOWED THE PROCS IN THE QRH WHICH DIRECTED US TO DISCONNECT THE AUTOPLT, RETRIM THE ACFT, AND THEN REENGAGE THE AUTOPLT. THIS PROB OCCURRED MULTIPLE TIMES SO IT WAS WRITTEN UP UPON ARR AT CVG. MAINT DEFERRED THE AUTOPLT AND STATED TO SEE HOW THE AIRPLANE FLIES WITHOUT THE AUTOPLT. ON THE NEXT FLT ENRTE TO CLT, EXCESSIVE L AILERON TRIM WAS NEEDED TO KEEP THE AIRPLANE FROM ROLLING R. MAINT WAS CONSULTED AND WE RETURNED TO CVG. MAINT LATER FOUND THE R AILERON HAD SLOP WITH THE HYDS ON (1/8 INCH PLAY).

Data retrieved from NASA's ASRS site as of July 2007 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.