Originally Posted by
sph33r
.ie is stop drilling accepted on hot parts? ... The missing info being : helicopter, turboshaft engine,
To add to the above comments, on the helicopter side, any stop-drilling or crack limitations will be listed in the MM and any crack/stop drill is more location specific than material specific. In most cases an engine can be operated with existing cracks as there is usually not a mandatory requirement to stop-drill the crack due to not all cracks can be accessible with a drill. But it's something I always recommend when possible. The attached PDF is an example from a RR C30 MM with stop-drill note highlighted.