Learjet 24

While executing a night visual approach to runway 09 in visual meteorological conditions the aircraft was allowed to descend; crashing into water 2 miles short of the runway. The pilot was not familiar with the airport and failed to make use of a full instrument landing system and visual approach slope indicating system which were operational for runway 09 at the time of the accident. The pilot stated there were no mechanical malfunctions with the aircraft which attributed to the accident. The aircraft was equipped with a radar altimeter system which also was not used by the pilot. The pilot performed two missed approaches because the airport was not in sight. The accident occurred during the 3rd attempt. Neither the pilot-in-command nor the copilot were properly certificated for the flight.

The aircraft, a Gates Learjet 24B, modified by a Howard/Raisebach Mark II conversion, was cleared for takeoff on runway 28L. Tower personnel estimated that the aircraft rotated for takeoff at 3,200 feet down the runway and was at approximately 200 feet agl when the pilot was instructed to contact departure control. Witnesses observed the aircraft climbing in a wings level attitude when it entered the broken cloud layer at about 600 feet agl. Moments later, the aircraft was observed descending out of the clouds at a steep angle and in a left wing low/nose down attitude. The aircraft impacted between runway 28L and 28R, approximately 10,000 feet from the approach ends. Witnesses reported that the engines sounded like they were operating at a high power setting. An exam of the engines revealed evidence that both were at or above 92% power at impact. No preimpact part failure/malfunction was found. Records revealed two autopilot discrepancies on 10/4/84; one induced the roll mode was sensitive; the other induced the autopilot intermittently rolled the aircraft into a standard rate left bank when engaged. Reportedly, the autopilot would not have been used for takeoff. All three occupants were killed.

On approach to Florianópolis-Hercílio Luz Airport, the crew failed to realize his altitude was too low when the airplane struck Mt Sangão located 23 km from the airfield. All four occupants were killed.

The aircraft departed on a sales demo flight to Monterey, CA with potential buyers aboard. En route, the destination was changed to Avalon, CA. Unicom advised the crew of the wind direction and speed on downwind. Witnesses reported the aircraft was slightly high on final, but said the pilot corrected the angle of descent. The aircraft touched down approximately 500 feet down the runway, which was crowned (sloped upward for approximately the 1st 2,000 feet, then leveled off). The crew could not see the end of the runway at touchdown. The thrust reversers were deployed approximately 1,000 feet after touchdown. Witnesses heard the engine sound increase, then decrease, then increase again as the aircraft went off the runway and over a 90 feet bluff. Fire erupted immediately. Within 3 minutes, airport personnel arrived with firefighting equipment, but they were not trained as firefighters and did not try to stop the fire for fear of an explosion. No evidence of a mechanical failure/malfunction was found. Found left flap extended, left spoiler retracted and locked, tire marks on runway. Estimated gross weight: 11,500 lbs. Computed landing distance over a 50 feet obstacle: 3,100 feet. The aircraft was destroyed and all six occupants were killed.

On final approach to Puerto Vallarta-Licenciado Gustavo Díaz Ordaz Airport, the crew descended below the glide until the airplane struck the ground and crashed short of runway threshold. All four occupants were injured and the aircraft was destroyed.

After the two aircraft were established at 14,000 feet during a target towing operation, N13MJ (lead aircraft) maintained straight and level flight on autopilot while N47MJ (chase) came up along the left side to observe the target on the left wing. While moving forward and looking out the right window to see a light on the target, the chase pilot lost sight of the lead aircraft. He reduced power and in the process of backing away, the chase aircraft struck the top of the flying tail of the lead acft with its radome jamming the flying tail. The lead aircraft pitched down, lost about 6,000 feet and then recovered. During the emergency landing of the lead aircraft, it pitched over when the gear was extended on short final, struck the ground hard short of the runway, bounced and started porpoising. As the pilot added power for a go-around, the aircraft started to roll. Power was reduced and about 5,000 feet down the runway, the gear collapsed causing the aircraft to veer off the runway. The pilot of the chase aircraft was not military trained and had no formal formation flight training.

While on a return flight to their company headquarters in McAllen, Texas, from Thermopolis, Wyoming, the president of Sky Train Air Inc., the chief pilot, and another company pilot stopped in Casper, Wyoming, for fuel. The lineman noted a fuel imbalance when 320 gallons of fuel were added to the left wing and only 260 gallons of fuel were added to the right wing tanks. According to the lineman, the crew was aware of the imbalance. A total of 585 gallons of Jet-A with Prist (anti-ice additive) was supplied which filled the wing tanks to capacity. No fuel transferring was necessary during the refueling. The lineman stated that he believed the fuselage tank was full because the nosegear strut was extended 6 to 12 inches. We stated a ground power unit was used to start the engines and he did not notice any difficulties with the aircraft during the crew's preflight checks. The flight plan filed by the president, reported to be the pilot-in-command, as follows: IFR to McAllen, Texas, at Flight Level (FL) 450, true airspeed 450 knots, Airway J170 to Denver, J17 to Amarillo, J17 to San Antonio, J25 to Corpus Christi, direct McAllen; time en route 2 hours 20 minutes with 3 hours 40 minutes of fuel on board. A weather briefing was not given to him because he had reported that he already had the weather information. The crew called the Casper Air Traffic Control Tower for taxi clearance at 1352:08 and began its departure from runway 21 at 1357:02. At 1449:39, while in cruise flight at FL 450, the flightcrew made initial radio contact with Sector 71 of the Albuquerque Air Route Traffic Control Center (ARTCC). The aircraft was "squawking" transponder code 0670. About 1458, a new controller took over the radar and data positions. At 1459:36, he issued a frequency change to which the crew did not respond. At the time, the controller noticed no transponder target reply from the aircraft. Until 1501:39, he made several attempts to contact the aircraft, but received no response. Albuquerque ARTCC radar computer data showed that radar contact with the aircraft was lost at 1458:07 at FL447. Five witnesses at Felt, Oklahoma, located in the southwest portion of the Panhandle, heard an aircraft overhead at a very high speed. One witness stated that he heard a vibration sound which indicated to him the aircraft was overspeeding. Another witness stated that the aircraft was about lo break the sound barrier. Of the five witnesses interviewed, only one saw the aircraft - and only momentarily - and he stated the aircraft was in about a 45° descent angle and the wings appeared to be rocking up and down. All the witnesses stated that they heard an explosion and saw a mushroom cloud of black smoke erupt when the aircraft crashed to the ground. The accident occurred at approximately 1502LT. The aircraft crashed 2.5 miles southwest of Felt, Oklahoma. All three occupants were killed.

During the takeoff roll at Dutch Harbor Airport, the airplane swerved then collided with rocks and the right side of the runway. The crew aborted the takeoff procedure but the airplane went out of control and crashed in flames. All six occupants were injured, three of them seriously. The aircraft was destroyed by fire.

After landing at Campinas-Viracopos Airport, the twin engine airplane was unable to stop within the remaining distance. It overran and came to rest few dozen meters further. Both pilots escaped uninjured while the aircraft was damaged beyond repair.

The crew was engaged in a local training flight at Las Vegas-McCarran Airport. During the takeoff roll, just after V1 speed, the pilot-in-command started the rotation. The airplane went out of control and crashed in flames. Both pilots escaped with minor injuries while the aircraft was damaged beyond repair.