Gear Box Bracket 
Those parts are the main support of the gear box. The cavity filling is a real challenge due to the very complex part geometry, together with the tightness requirement. The evacuation system with vacuum pump is necessary and it is used to avoid air in the part as much as possible. Other than the 100% leakage test, the 100% control with poroscope is done in order to ensure the porosities absence into the holes.