Question 21Gas Turbine - 1st Asst/Chief

The correct answer is A) Blade root. A tilted or raised compressor blade platform can indicate a failure at the blade root. The blade root is the attachment point where the blade connects to the rotor disk. If the blade root experiences a failure, such as cracking or fatigue, it can cause the blade platform to become tilted or raised, which is a tell-tale sign of this type of failure. The other options are incorrect because they do not directly relate to a tilted or raised blade platform. The carboloy pad, midspan damper, and tip clang are all different components of the compressor that could potentially fail, but they would not necessarily result in the observed condition of a tilted or raised blade platform.