In 2007, a problem was detected in the starboard SARJ and in one of the two beta gimbal assemblies (BGA).WILLIAM HARWOOD, "New solar array drive motor successfully tested, January 30, 2008, Spaceflight Now (accessed July 9, 2012) Damage had occurred due to excessive and premature wear of a track in the joint mechanism. The SARJ was frozen during problem diagnosis, and in 2008 lubrication was applied to the track to address the issue.
