On July 29, 2016, about 12:58 am Pacific daylight time, the pilot of a Piper PA-31T airplane, N661TC, reported the smell of smoke in the cockpit to air traffic control (ATC) and indicated that he wanted to return to the departure airport in Crescent City, California. ATC provided the clearance for the flight. About 1 minute later, the pilot reported that he had smoke in the cockpit and declared an emergency. There were no further communications from the pilot. According to the flight’s primary radar returns, the airplane continued to fly for about 3 minutes before breaking up in flight. The wreckage was found in tree-covered terrain near Arcata/Eureka Airport, McKinleyville, California. The airplane was being operated by Cal-Ore Life Flight as an air transport medical flight under the provisions of 14 Code of Federal Regulations Part 135. The airline transport pilot, two medical personnel, and one patient died.