Weather Briefing and Flight
Prior to takeoff, the pilot received a weather briefing and was advised to expect instrument flight rules (IFR) conditions in the vicinity of Oceanside, California. The briefing also indicated that moderate turbulence existed below 20,000 feet. After departure, the pilot obtained an IFR clearance to climb and cruise at 6,000 feet.
Loss of Contact and Crash
At approximately 2005 Pacific Standard Time, air traffic control lost radio and radar contact with the aircraft. Subsequently, the aircraft was found where it had crashed in mountainous terrain, about one-fifth of a mile from the location of the last transponder reply.
Wreckage Examination
Examination of the wreckage revealed that both outer wing panels, the right stabilator, and the vertical stabilizer had separated from the aircraft. These components were located at distances ranging from 130 to 612 feet from the main wreckage. Additionally, the remainder of the empennage had separated and was found 31 feet from the main wreckage. The bottom section of the fuselage and the rotating beacon were located 823 feet away. There was evidence that the main wreckage had impacted in a near-vertical descent. All separated parts exhibited evidence of overload failure.
Weather Conditions
Personnel near the accident site reported "shafts of heavy rain." At approximately 2018, the pilot of a Cessna 210 reported heavy rain about one mile north of the accident site.