Narrative:

I was lead technician on a cessna 560 V ultra working with another technician. We were assigned the task of replacing the rudder trim actuator on a routine phase inspection. I observed that he had the correct part number actuator; and he was using the appropriate maintenance manual for the installation. I bought back (verified) the installation and the technician put a separate discrepancy [write-up] for required travel check and rigging into the work order because there was not enough time to complete the task. The next day I was assigned the same aircraft and had assigned technician # 2 to do the rig and travel checks with technician # 1 assisting; since he had installed the actuator. To the very best of my knowledge; all maintenance manual procedures were observed in the rigging and travel checks. Three days later; I was phoned at home by my manager in hangar maintenance that the trim tab that we had worked on; was traveling in the opposite direction to what the cockpit control wheel [position indicated]; and [later] discovered that the trim cables were [found] crossed. I was also told that the aircraft had been flown over 50 flights and gone through several maintenance events. While the fact that no incidents or accidents were involved is good; I heard that the cause is being investigated and I would gladly cooperate in any way to help with any information in order to prevent such things from occurring in the future.

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Original NASA ASRS Text

Title: A Mechanic and Lead Mechanic were informed that rudder trim tab cables on a Cessna Citation 560 Ultra were found crossed; and the Trim Tab traveled in the opposite direction from what was commanded; when turning the Rudder Trim Tab Wheel. A Pilot noticed the incorrect tab movement during a preflight check; fifty-three flight legs after mechanics had changed the Trim Actuator.

Narrative: I was Lead Technician on a Cessna 560 V Ultra working with another Technician. We were assigned the task of replacing the rudder trim actuator on a routine phase inspection. I observed that he had the correct part number actuator; and he was using the appropriate maintenance manual for the installation. I bought back (verified) the installation and the Technician put a separate discrepancy [Write-up] for required travel check and rigging into the work order because there was not enough time to complete the task. The next day I was assigned the same aircraft and had assigned Technician # 2 to do the rig and travel checks with Technician # 1 assisting; since he had installed the actuator. To the very best of my knowledge; all maintenance manual procedures were observed in the rigging and travel checks. Three days later; I was phoned at home by my Manager in hangar maintenance that the trim tab that we had worked on; was traveling in the opposite direction to what the cockpit control wheel [position indicated]; and [later] discovered that the trim cables were [found] crossed. I was also told that the aircraft had been flown over 50 flights and gone through several maintenance events. While the fact that no incidents or accidents were involved is good; I heard that the cause is being investigated and I would gladly cooperate in any way to help with any information in order to prevent such things from occurring in the future.

Data retrieved from NASA's ASRS site as of April 2012 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.