Snag traced to low gap within the NTS bracket. Also, the pump housing hydraulic was observed to be low and rigging of the engine observed not to be correct. Hence, filler gauge was used to increase the NTS bracket space to 0.12mm, while the pump housing hydraulic was topped by about 2 quarts. Also, engine was properly rigged IAW technical manual. Thereafter, the aircraft was taken for Functional Check Flight and the snag cleared.