Cessna 414 Chancellor

The airplane had just taken off and was at approximately 300 agl when the right engine 'had a sudden and catastrophic failure.' The right propeller stopped spinning with the blades in the low-pitch position. The pilot initiated a right turn back toward the airport, but the airplane would not maintain altitude. The pilot rolled out of the turn, but the descent continued until the airplane struck the trees. Examination of the airplane's right engine revealed that the crankshaft was broken at the number 3 short cheek, just forward of the number two cylinder piston rod. The number two crankshaft bearing was broken and melted. The oil feed line to the number two bearing was blocked by a piece of the broken bearing. The Single Engine Climb Data table in the Cessna 414 Pilot's Operating Handbook indicates that an airplane weighing 5,680 pounds, with gear and flaps retracted and the inoperative propeller in feather, operating at a density altitude of 5,055 feet, will have a best climb indicated airspeed of 115 knots. The rate of climb will be 308 feet per minute.

The twin engine aircraft departed Tenerife-Sur-Reina Sofia Airport on a taxi flight to Tenerife-Norte-Los Rodeos Airport, carrying one passenger and one pilot. While descending to Los Rodeos Airport runway 12, weather conditions worsened and the pilot was instructed by ATC to make an approach to runway 30 via a special VFR clearance. Few minutes later, while approaching at an insufficient altitude, the aircraft collided with a house under construction and crashed in a garden. The aircraft was totally destroyed and both occupants were killed. The accident occurred in IMC conditions.

About 26 minutes after takeoff while at 21500 feet, the pilot requested a non existent route. Seven minutes later, the passenger stated the pilot was light headed and fading then he had passed out. The passenger had once held a student pilot certificate and about 5 years earlier she had accrued 73 hours of flight time in Cessna 150/152 aircraft. The air traffic controller, and other pilots on the radio frequency tried to assist the passenger. The passenger was advised to provide oxygen for herself and the pilot, but she was unable. The airplane climbed to 34,200 feet where the airplane departed controlled flight, recovered, then departed controlled flight several more times before beginning a nose low descent. Witnesses reported hearing the airplane orbiting several times while flying above a cloud layer then observed the airplane orbiting beneath the clouds. While in a descending right wing low attitude, the airplane impacted the ground and came to rest submerged in a pond. Examination of the flight controls, engines, and propellers revealed no evidence of preimpact failure or malfunction. A discrepancy with the regulating valve was noted. Two small holes were noted in the cabin door seal. The left wing pressurization duct had been replaced about 8 years earlier but the right wing pressurization duct, had not been replaced. The ducts are on-condition components. There was no preimpact failure or malfunction noted with the barometric pressure switch, the cabin altitude annunciator bulbs, the safety valve, solenoid valve, or differential pressure/cabin altitude gauge. Testing for carbon monoxide for both was negative.

The crew was completing a flight from Colmar to Zurich with an intermediate stop in Basel. While on a night approach to runway 28 at Zurich-Kloten Airport, both engines lost power simultaneously. The aircraft lost height, struck a three-floor building and crashed on a second one located few dozen metres further. The captain was seriously injured while the copilot was killed.

Witnesses observed the airplane overfly their homes at low altitude in a tight circular pattern. A witness about 1/2 mile from the airport '. . . watched the plane try to make a turn to the left trying to go back west to the Highland County Airport. The plane made a sharp turn, seemed to be having difficulty stabilizing the airplane . . . .' Also, a witness reported that she heard a loud noise, and then she observed an airplane just barely above the trees. The landing gear was down, and the airplane 'kept dipping up and down.' Another witness reported the airplane was 'wobbling left to right,' and then it descended into trees, struck vehicles, came to rest against a tree, and was destroyed by a post crash fire. A person, who flew with the pilot as a safety pilot on several occasions, reported that the pilot had a habit of making steep close-in turns, from downwind to base, to final; and he noticed 'lack in airspeed management during approach.' Examination of the wreckage did not disclose any preimpact failure of the airplane or engine.

Shortly after takeoff, the pilot contacted Charleston Approach Control to pick up his IFR clearance to the destination. The controller instructed the pilot to maintain VFR and he then attempted to coordinate with Washington Center for the clearance. The controller subsequently was unable to establish radar contact with the flight and he also lost radio contact with the pilot. The aircraft collided with the upslope of high terrain in weather conditions comprised of fog, sleet, and snow. The accident site was about 14 miles from the departure point. Toxicological testing of the pilot revealed benzoylecgonine.

Recorded radar data showed the aircraft was flying in an area of mountainous terrain. Mountain tops in the area were reported to be obscured. Radar data showed that the aircraft first descended to a low altitude as it flew up a valley, then it climbed until impacting rising terrain about 7,200 feet msl. Wreckage was scattered over 300 feet up the mountain slope. About 32 miles southwest at Bakersfield (elevation 507 feet), the 1000 pdt weather was in part: 4500 feet scattered, 6000 feet overcase, visibility 20 miles, wind from 260 degrees at 10 knots. Nearby residents reported that the mountain was obscured in clouds at the time of the accident. During postmortem toxicology tests, a low level of ethanol (23 mg/dl) was detected in muscle fluid specimen, probably from post-mortem production. No ethanol was detected in brain fluid.

The pilot took off from an uncontrolled airport. He attempted to obtain an IFR clearance and reported that he was VFR at 3,500 feet. While air traffic control personnel were locating the flight plan and coordinating the IFR clearance, they lost radio contact with the pilot. The pilot continued to fly towards his destination, transiting rising mountainous terrain which was partially obscured by clouds. Wreckage was located about 28 nautical miles from the departure airport, at the 4,050-foot level. There was no evidence of mechanical failure or malfunction. According to FAR Part 91.3, the pilot had the ultimate authority for the operation of the airplane, and in the case of an in-flight emergency, had the authority to deviate from flight rules "to the extent required to meet that emergency." According to the AIM, an emergency could be either "a distress or an urgency condition." An urgency condition would exist "the moment the pilot becomes doubtful about position... weather, or any other condition that could adversely affect flight safety." Under FAR Part 91.3, the pilot would have been authorized to climb the airplane under IFR conditions, even if he were to enter controlled airspace.

The pilot was cleared for the VOR runway 17 approach. Field elevation and the minimum descent altitude were 590 and 980 feet respectively. The missed approach point was 10.4 miles outbound from the Waco VOR, which coincided with the runway threshold. The pilot stated that the passenger seated in the right front seat established visual contact with the airport. After confirming that the airport was in sight and the runway environment identified, the pilot continued his descent towards the runway to land on runway 17. The pilot further stated that 'I realized that there would not be adequate runway to safely land, and initiated a right turn to execute a missed approach.' The right wing of the airplane impacted the top of the trees. The FAA inspector at the scene reported that after impacting the trees, the airplane continued through the trees for approximately 400 feet on a track of 344 degrees prior to coming to rest on a heading of 230 degrees.

While climbing through 6,300 feet, the pilot reported the complete loss of power on the right engine. Approx 4 min later, and after the pilot had established an emergency descent for a landing, he reported that the left engine had also lost power. The airplane impacted a driveway and skidded into a building. Examination revealed that the right engine failed due to shifting of the engine case halves. Review of the engine maintenance records indicated that several cylinders had been replaced in recent months; the cylinder through bolts are used to torque the engine case. A reason for the loss of power on the left engine was not determined.