A B737-800 aileron trim was not centered with hydraulic power on so they returned to gate where main...

Attributes
ACN	1039529
Time
Date	201209
Local Time Of Day	1801-2400
Place
Locale Reference	ZZZ.Airport
State Reference	US
Environment
Light	Dusk
Aircraft 1
Make Model Name	B737-800
Operating Under FAR Part	Part 121
Flight Phase	Parked
Flight Plan	IFR
Component
Aircraft Component	Aileron Control System
Person 1
Function	Pilot Flying
Events
Anomaly	Aircraft Equipment Problem Critical Deviation - Procedural Maintenance Deviation - Procedural Published Material / Policy

Narrative:

During pre-flight check of aileron trim indicated normal of 0 units of trim. Just prior to pushback when we turned on hydraulics the ailerons deflected 2 1/2-3 units to the right on the control wheel. [We] went back to the gate for maintenance. They turned the hydraulics on and off and saw the same problem we did. They called maintenance control; came back; turned on hydraulics; zeroed out the trim. The aileron trim now remained at 0 with hydraulics on or off; signed off book. Management charged us (flight crew) with an avoidable delay. I feel that management is falsely accusing the flight crew and putting pressure on myself and the captain to not properly handle maintenance items for the sake of on time departures.

Original NASA ASRS Text

Title: A B737-800 aileron trim was not centered with hydraulic power ON so they returned to gate where Maintenance Control had Mechanics zero the trim and released the aircraft but charged the crew for the maintenance delay.

Narrative: During pre-flight check of aileron trim indicated normal of 0 units of trim. Just prior to pushback when we turned on hydraulics the ailerons deflected 2 1/2-3 units to the right on the control wheel. [We] went back to the gate for maintenance. They turned the hydraulics on and off and saw the same problem we did. They called Maintenance Control; came back; turned on hydraulics; zeroed out the trim. The aileron trim now remained at 0 with hydraulics on or off; signed off book. Management charged us (flight crew) with an AVOIDABLE delay. I feel that Management is falsely accusing the flight crew and putting pressure on myself and the Captain to not properly handle maintenance items for the sake of on time departures.

Data retrieved from NASA's ASRS site as of July 2013 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.

A B737-800 aileron trim was not centered with hydraulic power on so they returned to gate where maintenance control had mechanics zero the trim and released the aircraft but charged the crew for the maintenance delay.