Learjet 35

At about 1146 pst, Learjet 35A, N521PA, operating as a public use aircraft, crashed in Fresno, CA. Operating with call sign Dart 21, the flightcrew had declared an emergency inbound to Fresno Air Terminal due to engine fire indications. They flew the airplane toward a right base for their requested runway, but the airplane continued past the airport. The flightcrew was heard on tower frequency attempting to diagnose the emergency conditions and control the airplane until it crashed, with landing gear down, on an avenue in fresno. Both pilots were fatally injured. Twenty-one persons on the ground were injured, and 12 apartment units in 2 buildings were destroyed or substantially damaged by impact or fire. Investigation revealed that special mission wiring was not installed properly, leading to a lack of overload current protection. The in-flight fire most likely originated with a short of the special mission power supply wires in an area unprotected by current limiters. The fire resulted in false engine fire warning indications to the pilots that led them to a shutdown of the left engine. An intense fire burned through the aft engine support beam, damaging the airplane structure and systems in the aft fuselage and may have precluded a successful emergency landing.

The aircraft was engaged in a military exercise jointly with the Taiwan Navy, carrying four crew members. While cruising over the Taiwan Strait and towing a target, the aircraft was mistakenly shot down by a surface-to-air missile fired from a Taiwan Navy frigate. The aircraft exploded and its debris were found off Taitung. All four crew members were killed.

The crew departed Cologne-Bonn Airport on a training flight (check flight) to Nuremberg. During the takeoff roll, at or near V2 speed, the aircraft deviated to the left and veered off runway. It rolled beside the runway for about 600 metres then returned on the runway. It took off but overturned and crashed upside down, bursting into flames. All four occupants were killed.

Following an uneventful flight from Mexico City, the crew was cleared for an approach to Hermosillo-General Ignacio Pesqueira Garcia Airport runway 23. During the descent, the crew was alerted by ATC about poor weather conditions and limited visibility. On final, at an altitude of 1,800 feet, the aircraft struck the slope of Mt El Bachoco located 10,4 km short of runway 23. The aircraft was destroyed and all nine occupants were killed.

The crew attempted a night landing at Cumuatillo-Pajacuarán Airport that was not equipped with any facilities, tower or lighting systems. The aircraft approached in a wrong position relating to the runway direction and struck the ground near the runway threshold in a near perpendicular heading. It went out of control, crashed and came to rest near a road, broken in several pieces. Both pilots were killed. A load of cocaine was found among the debris.

The aircraft departed São Paulo-Congonhas Airport on an ambulance flight to Uberlândia, carrying two doctors and two pilots who should pick-up a patient. The copilot was pilot flying. This was his first flight on a Learjet without an instructor. This was against regulations since the copilot was not fully qualified yet and the captain was not qualified to act as an instructor. Upon arrival at Uberlândia, weather conditions were poor with a low ceiling at 100 meters (clouds 8/8), fog and an horizontal visibility less than 200 meters (below minimums weather conditions). The crew abandoned the approach and initiated a go-around procedure. Few minutes later, a second approach was also abandoned. Rather than diverting to the alternate airport, the crew attempted a third approach when the aircraft struck the ground and crashed short of runway threshold. All four occupants were seriously injured and the aircraft was destroyed.

The flight crew reported to the tower controller that they were over the airport and requested a right downwind circling approach to runway 15. The tower controller and other witnesses observed the airplane in a steep right bank on base leg. The airplane overshot the extended runway centerline. The tower controller observed the airplane entering a steeper right bank to correct back to the runway centerline. The controller stated that he observed the airplane "flutter" and then crash right-wing first, about one mile north of the runway threshold. Other witnesses reported a variety of indications consistent with a loss of control. The last recorded transmission was "Oh no you're (stall…)." The ( ) indicates that the word was questionable text. Both engines were producing about 1,700 pounds of thrust (2,561 pounds available). A snow squall had just passed over the airport and was obscuring mountains to the east. The terrain was snow covered. The accident occurred about eight minutes before official sunset. The approach procedure is not authorized at night or for category D airplanes. Minimums for the approach were three miles visibility with an MDA of 10,840 feet. Airport elevation is 7,815 feet. Both pilots were rated in the airplane. It could not be determined which pilot was at the controls at the time of the accident.

During the takeoff roll on runway 24 at McClellan-Palomar Airport, one of the engine failed between V1 and VR. After both wings struck the runway surface, the crew lost control of the airplane that crash near the runway end. Both pilots were slightly injured and the aircraft was written off.

The crew was positioning the aircraft in preparation for a revenue flight and executing a non-directional beacon (NDB) approach to runway 05. The captain reported that the copilot was flying the aircraft. However, the captain stated that he took control of the aircraft during the approach and made some control corrections before returning control of the aircraft to the copilot. Radar data indicated that aircraft control was erratic throughout the approach and that the airspeed and descent rates were high (3,000 fpm sink rate) shortly before the accident. The aircraft struck a fence short of the runway and impacted the ground. The captain said he realized the aircraft was drifting left of course but did not correct it. He said he told the copilot to add power twice during the approach. The copilot's training history indicated difficulty in control, scan of instruments, and with instrument procedures. Company management described the captain as passive and the copilot as aggressive. Supervision of training and operations by management and surveillance of the company by the FAA was considered inadequate by NTSB.

Witnesses reported a normal takeoff. Radar indicated the aircraft turned right as cleared and began cruise at 1900 feet, heading northwest at 235 knots. 65 seconds after calling clear of the control zone the aircraft's radar track ended. The aircraft was fragmented by the impact with all flight control surfaces and aircraft extremities found at the impact site. Pitch trim was found in the normal cruise setting with gear, flaps, and spoilers in the retracted position. Examination of the engines indicated operation at impact. Aircraft struck the terrain in approx 80° nose down, wings level attitude and heading opposite to the previous direction of flight. In flight simulator tests, with the aircraft initially in level flight at 1,900 feet and then rolled inverted and the pitch control moved aft, the aircraft attitude was similar to the attitude at impact. There were two unauthorized passengers on board, one was the copilot's wife. The impact point was in a very small region of uncontrolled airspace very near the copilot's and relative's homes. The copilot was new to jet operations. The aircraft departed with several discrepancies uncleared. All four occupants were killed.