Narrative:

During taxi out; the flight controls tested normally after flap extension. On initial climb; I noticed an unusual left roll tendency which was easily corrected with opposite roll input. After we cleaned up and were established on course; I attempted to correct with rudder trim as normal. A substantial amount of trim was required to reduce the left roll tendency. After leveling at FL300; we discussed the out of trim situation and worked to re-trim using flight manual procedures. The EICAS display showed the left inboard aileron in the 50% up position and not responding to control inputs in coordination with the right inboard aileron. Captain then notified maintenance control of the trim situation and attempted to contact dispatch via satcom. Communications with dispatch and maintenance control became an exercise in futility due to failing satcom voice and ACARS and very poor HF communications. We discussed our options and chose to continue to ZZZ while carefully monitoring our fuel state at each waypoint. Approximately 90 mins into the flight the left aileron began to return to its normal flared position and the flight controls were re-trimmed as normal. The flight continued normally to ZZZ. Callback conversation with reporter acn #809562 revealed the following information: although maintenance was quite curious about the aileron write up in the aircraft log; no possible fault scenarios were discussed and the reporter was never informed of the findings.

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Original NASA ASRS Text

Title: B767 FLIGHT CREW REPORT INBOARD AILERON STUCK IN THE 50% UP POSITION AFTER TAKE OFF. EICAS FLIGHT CONTROL DISPLAY INDICATES THAT AILERON DOES NOT MOVE IN TURNS. COMMUNICATION DIFFICULTIES PREVENT MAINTENANCE INVOLVEMENT AND PROBLEM CORRECTS ITSELF.

Narrative: DURING TAXI OUT; THE FLT CTLS TESTED NORMALLY AFTER FLAP EXTENSION. ON INITIAL CLB; I NOTICED AN UNUSUAL L ROLL TENDENCY WHICH WAS EASILY CORRECTED WITH OPPOSITE ROLL INPUT. AFTER WE CLEANED UP AND WERE ESTABLISHED ON COURSE; I ATTEMPTED TO CORRECT WITH RUDDER TRIM AS NORMAL. A SUBSTANTIAL AMOUNT OF TRIM WAS REQUIRED TO REDUCE THE L ROLL TENDENCY. AFTER LEVELING AT FL300; WE DISCUSSED THE OUT OF TRIM SITUATION AND WORKED TO RE-TRIM USING FLT MANUAL PROCS. THE EICAS DISPLAY SHOWED THE L INBOARD AILERON IN THE 50% UP POS AND NOT RESPONDING TO CTL INPUTS IN COORD WITH THE R INBOARD AILERON. CAPT THEN NOTIFIED MAINT CTL OF THE TRIM SITUATION AND ATTEMPTED TO CONTACT DISPATCH VIA SATCOM. COMS WITH DISPATCH AND MAINT CTL BECAME AN EXERCISE IN FUTILITY DUE TO FAILING SATCOM VOICE AND ACARS AND VERY POOR HF COMS. WE DISCUSSED OUR OPTIONS AND CHOSE TO CONTINUE TO ZZZ WHILE CAREFULLY MONITORING OUR FUEL STATE AT EACH WAYPOINT. APPROX 90 MINS INTO THE FLT THE L AILERON BEGAN TO RETURN TO ITS NORMAL FLARED POS AND THE FLT CTLS WERE RE-TRIMMED AS NORMAL. THE FLT CONTINUED NORMALLY TO ZZZ. CALLBACK CONVERSATION WITH RPTR ACN #809562 REVEALED THE FOLLOWING INFO: ALTHOUGH MAINTENANCE WAS QUITE CURIOUS ABOUT THE AILERON WRITE UP IN THE AIRCRAFT LOG; NO POSSIBLE FAULT SCENARIOS WERE DISCUSSED AND THE REPORTER WAS NEVER INFORMED OF THE FINDINGS.

Data retrieved from NASA's ASRS site as of May 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.