Engine Initially Ran Smooth But Began Knocking And Vibrating

On October 28, 2020, about 1145 eastern daylight time, a Cessna 182T airplane, N3537C, was substantially damaged when it was involved in an accident near Lebanon, Ohio. The pilot and passenger were not injured. The airplane was operated as a Title 14 Code of Federal Regulations Part 91 personal flight. The pilot stated he and the passenger were ferrying the airplane from Clermont County Airport (I69), Ohio, to Warren County Airport (I68), Ohio following maintenance to install new avionics. While flying at 3,000 ft mean sea level (MSL) in instrument meteorological conditions the oil pressure dropped to zero. The engine initially ran smooth but began knocking and vibrating.