BE55 instructor pilot reported the ailerons locked up and it took considerable effort to break them ...

Attributes
ACN	1365368
Time
Date	201606
Local Time Of Day	1201-1800
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Make Model Name	Baron 55/Cochise
Operating Under FAR Part	Part 91
Flight Phase	Cruise
Route In Use	None
Flight Plan	None
Component
Aircraft Component	Aileron Control System
Person 1
Function	Instructor
Qualification	Flight Crew Commercial Flight Crew Flight Instructor Flight Crew Multiengine Flight Crew Instrument
Experience	Flight Crew Last 90 Days 180 Flight Crew Total 1400 Flight Crew Type 45
Events
Anomaly	Aircraft Equipment Problem Critical

Narrative:

During a routine training flight; while doing unusual attitudes the ailerons momentarily locked up. In order to break the ailerons free it took a lot of pressure. I advised air traffic control of the situation and reported that I was not declaring an emergency at that time but that the situation was urgent. Upon touchdown and taxi in to the ramp; I was met by emergency crews who needed various information. Maintenance inspected the airplane and determined that lock up in the controls was caused by the aileron linkage behind the dash was getting caught on a fuel pressure gauge line. Maintenance repaired the defect. In hindsight; the only thing I would have done differently would be that I would declare an emergency in order to be ATC's priority.

Original NASA ASRS Text

Title: BE55 instructor pilot reported the ailerons locked up and it took considerable effort to break them free. Post flight inspection revealed the aileron linkage was caught on a fuel pressure gauge line.

Narrative: During a routine training flight; while doing unusual attitudes the ailerons momentarily locked up. In order to break the ailerons free it took a lot of pressure. I advised Air Traffic Control of the situation and reported that I was not declaring an emergency at that time but that the situation was urgent. Upon touchdown and taxi in to the ramp; I was met by emergency crews who needed various information. Maintenance inspected the airplane and determined that lock up in the controls was caused by the aileron linkage behind the dash was getting caught on a fuel pressure gauge line. Maintenance repaired the defect. In hindsight; the only thing I would have done differently would be that I would declare an emergency in order to be ATC's priority.

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.