Fuel Pressure And RPMs Fluctuated Between Normal And Zero

On January 02, 2022, about 1040 mountain standard time, a Zenith CH750, N750DP, was substantially damaged when it was involved in an accident near Montrose, Colorado. The pilot was uninjured. The airplane was operated as a Title 14 Code of Federal Regulations (CFR) Part 91 personal flight. The pilot stated that before taking off for the flight, he added 24 gallons of 92 octane, ethanol free automotive gas to the fuel tanks. After waiting for the fuel to settle, he sumped the fuel tanks and observed no contamination or water. About 30 minutes after departure and while in cruise flight, at an altitude of about 10,500 ft mean sea level, he observed the fuel pressure decrease from 44 pounds per