To: Head Turner
IF it is the gearboxes cracking, one could speculate that there is some other component exciting a vibration leading towards the gearbox. Thus causing stress at the gearbox.
Or, the stress analysis on the gearbox casting was faulty or the design cross section at a critical point was inadequate for the applied loads resulting in a crack in the casting. Or, the FMECA questioned the gearbox design pointing out the possibility of the gearbox cracking and the FMECA was ignored. Apply this, as you will.
