Helicopter main reducer fairing locking reliability inspection tool

The utility model belongs to the technical field of displacement measurement, and particularly relates to a helicopter main speed reducer fairing locking reliability inspection tool, which comprises a sleeve, a measuring rod and an indication assembly, a piston is arranged at one end of the measuring rod, a sliding hole is arranged in the sleeve, the piston slides close to the sliding hole, and the measuring rod can extend out of the sleeve; the inner wall of the sliding hole is connected with the piston through a spring; a mounting groove is formed in the side wall of the sleeve, the mounting groove is communicated with the sliding hole, and a graduated scale is arranged on the mounting groove; the indicating assembly comprises a sliding part and an indicating scale arranged on the sliding part, the sliding part is arranged in a sliding mode close to the sliding hole, and the indicating end of the indicating scale is arranged right opposite to the graduated scale. The tool can quickly complete the length mea