I would appreciate if you could assist with a gear failure (occurring)
after just seven weeks in service, post installation. This driving gear
wheel has been installed in a medium-speed engine with backlash
present at four different positions; with additional backlash checked on
the mating surfaces. All backlash was found within (OEM)-recommended values. Please note included photos - it seems that the crack has started at the root fillet. Any comments would be appreciated.