B767 captain reported aileron problems during the before-takeoff checklist.

Attributes
ACN	1567833
Time
Date	201808
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	B767-200
Operating Under FAR Part	Part 121
Flight Phase	Taxi
Flight Plan	IFR
Component
Aircraft Component	Aileron Control System
Person 1
Function	Captain Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP) Flight Crew Instrument Flight Crew Multiengine
Events
Anomaly	Aircraft Equipment Problem Less Severe

Narrative:

The first officer (first officer) performed the flight control check of the before takeoff checklist and noticed an unusual vibration/burble when the ailerons were operated. I confirmed this and we blocked back in and wrote up the issue as a vibration/burble in the control column when the control wheel was turned to the right. After trouble shooting with mx the issue appeared to be most severe when the right inboard aileron was operated with the flaps at 15. Mx inspected the right inboard aileron and reported that one of the actuators; which appeared to have recently been installed; was almost completely lacking any lubrication. After lubricating this actuator the control operation improved.

Original NASA ASRS Text

Title: B767 Captain reported aileron problems during the Before-Takeoff Checklist.

Narrative: The FO (First Officer) performed the flight control check of the before takeoff checklist and noticed an unusual vibration/burble when the ailerons were operated. I confirmed this and we blocked back in and wrote up the issue as a vibration/burble in the control column when the control wheel was turned to the right. After trouble shooting with MX the issue appeared to be most severe when the right inboard aileron was operated with the flaps at 15. MX inspected the right inboard aileron and reported that one of the actuators; which appeared to have recently been installed; was almost completely lacking any lubrication. After lubricating this actuator the control operation improved.

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.