EMB ERJ 170/175 ER/LR
Maintenance Airframe; Maintenance Powerplant
Confusion; Training / Qualification; Troubleshooting; Workload
Aircraft Equipment Problem Less Severe; Deviation / Discrepancy - Procedural Published Material / Policy; Deviation / Discrepancy - Procedural FAR; Deviation / Discrepancy - Procedural Maintenance
General Flight Cancelled / Delayed; General Maintenance Action
Company Policy; Human Factors; Incorrect / Not Installed / Unavailable Part; Chart Or Publication; Aircraft; Manuals; Procedure
I was tasked with changing the #200 main landing gear assembly which involves replacing the main side strut assembly. The lower portion of the side strut was found to be installed backwards.An FCD was issued the inspect the fleet for this problem. It was found on a RON.The task is very lengthy; taking more than one shift to complete; and the work card that is used requires you to refer to one of the many figures in the back often or just says refer to the AMM. We receive the upper and lower main side strut as a single unit already assembled and cotter pinned from stock. The work card step only indicated; if necessary; invert the articulation nut. It did not specify the need to rotate the lower strut or give any installation procedures. The note regarding the bearing is vague and relies solely on the image given.I was informed it was found while preforming the FCD at another base. Include steps and figures for installing the articulating nut and make it a step on the work card to inspect the orientation of the side strut instead of just a note. Have the assembly come from stock with the nut loose and no safety pre-installed.
Technician reported installing a main landing gear side strut assembly backwards; citing unclear documentation.