Narrative:

WX was good so PIC accepted flight; first flight of day checks were completed; med crew was loaded; engines started. All before taxi checks were completed and we got a taxi clearance; all taxi and before takeoff checklist was completed. Takeoff roll was normal; and through V1 and vr everything felt normal; however what I initially noticed was that it was increasingly hard to hold runway heading which was what I was assigned. The yoke control pressure to keep wings level was becoming so hard that it took both hands to accomplish the task; I then checked the trim indicators to see if they were out of whack but the indicators were showing centered or very close. I asked the PNF who was also the PIC to feel the controls; we had a positive exchange of controls then he agreed that there was a control issue at which point he visually checked both the aileron and rudder trim indicators that appeared normal. Once he had control I tried to turn the trim knob and it felt bound but didn't want to overpower it because I was not the PF and could not experience any inputs that I made. We requested to turn back and ATC asked what the issue was and we told them we were having control problems. We turned back to the field and switched controllers. I checked engine gauges to make sure everything else was normal and it was; the PIC was struggling to keep wings level and we discussed if it was harder to hold the faster we went and he said he thought it was; which made me again check the trim indicators but again they looked normal. We were given a visual approach which we accepted; then discussed how we wanted to bring down flaps and gear being cautious not to exacerbate the situation. While on final the PIC again tried adjusting the trim and got movement and the rolling right tendency went away and a normal landing was conducted.

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Original NASA ASRS Text

Title: CE560 flight crew experienced a strong rolling tendency and aileron trim binding during initial climb then the controls are passed to the PIC in the right seat. The crew elects to return to the departure airport and the PIC is able to adjust the aileron trim to neutralize the rolling tendency prior to landing.

Narrative: WX was good so PIC accepted flight; first flight of day checks were completed; med crew was loaded; engines started. All before taxi checks were completed and we got a taxi clearance; all taxi and before takeoff checklist was completed. Takeoff roll was normal; and through V1 and Vr everything felt normal; however what I initially noticed was that it was increasingly hard to hold runway heading which was what I was assigned. The yoke control pressure to keep wings level was becoming so hard that it took both hands to accomplish the task; I then checked the trim indicators to see if they were out of whack but the indicators were showing centered or very close. I asked the PNF who was also the PIC to feel the controls; we had a positive exchange of controls then he agreed that there was a control issue at which point he visually checked both the aileron and rudder trim indicators that appeared normal. Once he had control I tried to turn the trim knob and it felt bound but didn't want to overpower it because I was not the PF and could not experience any inputs that I made. We requested to turn back and ATC asked what the issue was and we told them we were having control problems. We turned back to the field and switched controllers. I checked engine gauges to make sure everything else was normal and it was; the PIC was struggling to keep wings level and we discussed if it was harder to hold the faster we went and he said he thought it was; which made me again check the trim indicators but again they looked normal. We were given a visual approach which we accepted; then discussed how we wanted to bring down flaps and gear being cautious not to exacerbate the situation. While on final the PIC again tried adjusting the trim and got movement and the rolling right tendency went away and a normal landing was conducted.

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.