Aspects of the disclosure are directed to a shaft of an engine of an aircraft, an oil scoop coupled to the shaft, a first portion of a sensor integrated with the oil scoop, and a second portion of the sensor coupled to a structure of the engine. In some embodiments, the first portion of the sensor comprises at least one tooth.

A coating agent, a cured product of which after curing having a tear strength, at each of 25? C. and 80? C., of 20 KN/m or more, and having a type A durometer hardness at 25? C. of from 30 to 100, and a spring using the same.