Narrative:

While changing leading edge slat actuators, it was brought to my attention that a spacer had to be installed on the pinion gear shaft by a fellow co-worker who had done the opposite wing I had completed on aircraft. The spacer in concern was overlooked by me because I thought it was part of the actuator housing and I misread manual concerning installation -- I thought it was referring to another spacer installed on opposite side of pinion gear. The installation of these actuators and engineering service order is a first time job on the B757, which is a new aircraft to our dock and crew.

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Original NASA ASRS Text

Title: A B757-200 WAS RETURNED TO SVC IN NON COMPLIANCE WITH 2 LEADING EDGE SLAT ROTARY ACTUATORS THAT WERE INSTALLED INCORRECTLY.

Narrative: WHILE CHANGING LEADING EDGE SLAT ACTUATORS, IT WAS BROUGHT TO MY ATTN THAT A SPACER HAD TO BE INSTALLED ON THE PINION GEAR SHAFT BY A FELLOW CO-WORKER WHO HAD DONE THE OPPOSITE WING I HAD COMPLETED ON ACFT. THE SPACER IN CONCERN WAS OVERLOOKED BY ME BECAUSE I THOUGHT IT WAS PART OF THE ACTUATOR HOUSING AND I MISREAD MANUAL CONCERNING INSTALLATION -- I THOUGHT IT WAS REFERRING TO ANOTHER SPACER INSTALLED ON OPPOSITE SIDE OF PINION GEAR. THE INSTALLATION OF THESE ACTUATORS AND ENGINEERING SVC ORDER IS A FIRST TIME JOB ON THE B757, WHICH IS A NEW ACFT TO OUR DOCK AND CREW.

Data retrieved from NASA's ASRS site as of July 2007 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.