Bullhead City

Witnesses located at a gun club reported observing the airplane make a high-speed, low pass from north to south over the club's buildings and then maneuver around for another low pass from east to west. During the second low pass, the airplane collided with a radio tower that was about 50 ft tall, and the right wing sheared off about 10 ft of the tower's top. The tower's base was triangular shaped, and each of its sides was about 2 ft long. One witness reported that the airplane remained in a straight-and-level attitude until impact with the tower. The airplane then rolled right to an almost inverted position and subsequently impacted trees and terrain about 700 ft southwest of the initial impact point. One witness reported that, about 3 to 4 years before the accident, the pilot, who was a client of the gun club, had "buzzed" over the club and had been told to never do so again. A postaccident examination of the engines and the airframe revealed no evidence of a mechanical malfunction or failure that would have precluded normal operation.

The aircraft broke up in-flight during a high speed descent after encountering clouds and reduced visibilities aloft. The weather conditions included multiple cloud layers at 9,000, 12,000 and 16,000 feet, and reduced visibility aloft from smoke and haze from wilderness wild fires that were occurring over large portions of Southern California. The aircraft departed the airport toward a VORTAC to the west, approximately 30 nautical miles (nm) away. The first radar contact was at 1159, and the aircraft's Mode C transponder reported an altitude of 3,500 feet mean sea level (msl). By the time the aircraft reached the VORTAC, the altitude had increased to 4,900 feet msl. The aircraft continued to climb, passing through the VFR flight plan filed altitude of 8,500 feet msl, until it reached an altitude of 12,900 feet msl. The last 6 minutes of radar data reported the aircraft at various altitudes, starting at 11,000 feet msl and climbing to a maximum altitude of 12,700 feet msl. During the last 3 minutes of flight, radar data showed the aircraft made numerous left and right climbing and descending turns, eventually reversing course. The next to last radar return at 1221:24 indicated an altitude of 11,900 feet msl. Nineteen seconds later, the last radar return reported an altitude of 7,700 feet msl. The computed vertical speed between the last two radar returns was 13,263 feet per minute. The wreckage was distributed over a 0.2-nm distance, with the main wreckage approximately 0.5 miles northwest of the last radar return. The northern end of the debris path began with pieces of the left elevator, followed by sections of the right stabilizer and elevator, and more sections from both horizontal empennage surfaces. Pieces of the vertical stabilizer, rudder, and both ailerons were also found along the debris path. The southern 100 feet of the debris path contained the fuselage and both sets of wings, engines, and propellers. The aircraft impacted the ground inverted. The wings separated just outboard of the nacelles at the initial point of impact. Examination of the wreckage showed that all structural failures were the result of overload.

The airplane crashed into rising terrain after departure from an uncontrolled public airport. The runway used by the pilot is 4,600 feet long and has a 1.8 percent upward gradient. The density altitude was 4,937 feet msl, and a slight quartering tailwind existed at the time. The pilot held in position, powered up the engines, and started his departure. The airplane was observed using most of the runway length before rotation and then it assumed a higher than normal pitch attitude in the initial climb. Witnesses watched the airplane turn left following the route of a canyon and into rising terrain. The reciprocal runway departs towards decreasing elevations. In the area of the crash, two witnesses reported the airplane was at a low altitude, nose high, and wallowing just before it descended into a drainage area 0.69 miles from the runway. Post accident examination of the engines revealed worn camshaft lobes and tappets, which would negatively affect the ability of the engines to produce full rated power. One engine exhibited severe rust on the entire crankshaft. The accident site was located in a canyon, and the wreckage and ground scars was confined to an area about the diameter of the wing span. Major portions of the airframe and most of the engine accessories were consumed by a post accident fire. Examination of the wreckage established that all major components of the airframe and powerplants were at the site.

After executing a missed approach at the Grand Canyon Airport, the pilots diverted to the Bullhead City Airport. The pilots reported that minimal icing conditions were encountered with about 1/8 inch of ice accumulating on the aircraft wings. The pilots stated they cycled the deice boots to shed ice. They did not observe ice on the propeller spinners, and they did not activate the engines' 'override' ignition systems, as required by the airplane's flight manual. Use of 'override' ignition was required for flight into visible moisture at or below +5 degrees Celsius (+41 degrees Fahrenheit) to prevent ice ingestion/flameouts. Subsequently, both engines flamed out as the airplane was on about a 3 mile final approach for landing with the landing gear and flaps extended. The aircraft was destroyed during an off-airport landing.

The aircraft lost power on the left engine during climb to cruise approximately 8 minutes after takeoff. Airport manager heard unicom transmission from N36CA, 'we lost an engine, we're coming back.' A warning horn (possibly gear warning or stall horn) was heard in the background of the transmission. When N36CA failed to return the airport manager called the sheriff and began search in his own aircraft. N36CA was located approximately one hour after it's departure. The forced landing was in a flat, wings level attitude with 22° of flaps extended. Initial impact occurred in area of 8 feet high brush. Distance from initial impact to final rest was 595 feet on heading of 140°. Although restrained by lap belt and harness, pilot hit head on copilot's control yoke during the accident. The left eng turbine blade had failed in fatigue. The pilot's son said his father shut down the right engine in-flight and as a result the aircraft had no power on either engine. All three occupants were injured.