The post-2005 main landing gear wheel design had shown a susceptibility to fatigue cracking at the inner hub bearing bore shoulder radius.
The wheel manufacturer has changed the design to eliminate susceptibility to cracking at this location
The wheel manufacturer made a change to the design of new production wheel components, incorporating shot peening of the entire bearing bore area to help prevent the fatigue cracks from developing. This change was introduced at wheel assembly serial number B15419. The improved wheels were intended for delivery on new aircraft at line number 3099; scheduled for November 2009.
The ATSB is satisfied that the action taken by the wheel assembly manufacturer adequately addresses the safety issue.
