Which blade maintenance term describes a partial fracture?

The term that describes a partial fracture in blade maintenance is "Crack." In aviation maintenance, particularly with rotor blades or propellers, a crack indicates a structural failure where the material has been compromised. This can occur due to various factors, including stress, fatigue, or environmental conditions. Recognizing and identifying a crack is crucial, as it can significantly affect the integrity and performance of the blade, potentially leading to catastrophic failure if not addressed.

Understanding the implications of a crack means that maintenance personnel must take immediate action to evaluate and repair the damage, ensuring the safety and reliability of the aircraft. Other terms related to blade maintenance, such as blending, bowing, and denting, refer to different types of damage or wear that do not specifically indicate a fracture in the material.