Be-400XP flight crew reported returning to the departure airport due to a roll trim runaway.

Attributes
ACN	1391224
Time
Date	201609
Local Time Of Day	0601-1200
Place
Locale Reference	ZZZ.Airport
State Reference	US
Aircraft 1
Make Model Name	Beechjet 400
Flight Phase	Climb
Flight Plan	IFR
Component
Aircraft Component	Aileron Trim System
Person 1
Function	Pilot Not Flying Captain
Qualification	Flight Crew Air Transport Pilot (ATP)
Person 2
Function	First Officer Pilot Flying
Qualification	Flight Crew Air Transport Pilot (ATP)
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During climb out we had an uncommanded roll trim runaway. After completing all necessary checklists we were unable to rectify the situation. We returned to our departure airport and landed the aircraft uneventfully with a significant amount of roll control input from the pilot.

Original NASA ASRS Text

Title: BE-400XP flight crew reported returning to the departure airport due to a roll trim runaway.

Narrative: During climb out we had an uncommanded roll trim runaway. After completing all necessary checklists we were unable to rectify the situation. We returned to our departure airport and landed the aircraft uneventfully with a significant amount of roll control input from the pilot.

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.