B747-400
Maintenance Airframe
Situational Awareness; Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy
General Maintenance Action
Chart Or Publication; Human Factors; Incorrect / Not Installed / Unavailable Part
I was notified July 2012; that bearings were incorrectly installed on (4) B747-400 main tire/wheel assemblies; inboard side. Four; B747-400 main tires were built in July 2012. Two have been located and brought to the Shop and two remain out in the system. The one tire assembly that I worked on has not been verified with wrong bearing; but all four were built on the same day.
Today I was notified that a wrong bearing was installed on the inboard side of a B747-400 Main Tire. There were 4-each built in July 2012. Of the four built; two are in the Tire Shop and two are in the system. It has been confirmed the remaining two are not in ZZZ. I was not aware a mistake was made until I was notified by my Lead.
Two tire shop mechanics were informed that four B747-400 main tire/wheel assemblies that were built-up in their shop; were found with incorrect wheel bearings installed on the inboard side.