Takeoff (climb)

During the night before the accident, freezing rain followed later by snow, fell on the ramp where the airplane was parked. A witness reported that while assisting the pilot in removing snow from the airplane, he noted that 80% of the wing was covered with a coarse layer of ice, from 1/16 to 3/16 in thickness, that was not removed before flight. After the accident, a fireman from the city of lubbock fire department noted ice on the wing approximately 1/16th of an inch thick that had a rough texture that looked as if deposited by freezing rain. The pilot reported that shortly after take off she heard a power decrease and felt surges in the aircraft. The pilot then looked for a place to land. A detailed examination of the engine revealed no mechanical deficiencies.

During the takeoff roll on runway 20 at Kathmandu-Tribhuvan Airport, the aircraft failed to get airborne, overran, went through a fence and came to rest in a field. A passenger and a pilot were killed while all other occupants were rescued.

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.

A witness located near the departure end of the runway saw the airplane initially climb in a normal manner, then stay below the clouds and make a shallow bank 180-degree left turn and descend below a tree line. Tower tapes revealed that the pilot twice transmitted that he was "coming back" to the airport during which the background sound of the "fuel selector off" warning horn was heard. The pilot then informed the controller "I've got to get back", and no warning horn was heard. The airplane collided with trees and came to rest about 6,500 feet sse of the runway's end. Prior to departure, the airplane was refueled with 40 gals of jet a (20 gals per tank), which increased the total fuel load to 148 gals. The flight manual required that the fuel balance between the left and right tanks be kept within 200 pounds, and suggested turning off one fuel selector to correct unbalance situations. The condition of one fuel selector turned off will cause the "fuel selector off" warning horn to sound. Exam of the aircraft revealed no evidence of preimpact failures. Prop blade butt signatures indicated it was operating in the governing range, and engine power was being produced at impact.

Few minutes after takeoff from Mombasa-Daniel Arap Moi Airport, while climbing, the twin engine aircraft went out of control and crashed in an open field located 20 km south of the airport. Both passengers were seriously injured and the pilot was killed.

The aircraft was completing a flight from Kish Island to Tehran with an intermediate stop in Isfahan. Shortly after takeoff from Isfahan-Shahid Beheshti Airport, while climbing to the altitude of 2,000 feet, the crew reported pressurisation problems and was cleared to return for an emergency landing. Five minutes after its departure, the aircraft went out of control and crashed few km from the airport. All 12 occupants were killed, among them General Mansour Sattari, Chief of the Iranian Air Force.

Shortly after takeoff, one of the engine failed. The pilot elected to make an emergency landing when the aircraft crashed near the runway end. Both occupants were killed, among them Eduardo Mata, Mexican conductor and composer. He was accompanied by Marina Anaya and was en route to Dallas, TX.

The crew was engaged in a local training flight at Bili Airfield. During the takeoff roll on a grassy airstrip, the crew lost control of the airplane that veered off runway, lost its undercarriage and came to rest. Both pilots escaped uninjured and the aircraft was damaged beyond repair.

The crew was completing a local training at Trinidad-Jorge Heinrich Arauz Airport. Upon takeoff, the aircraft lost height and crash landed by the runway. All four occupants escaped uninjured while the aircraft was damaged beyond repair. It is believed that the loss of control occurred at liftoff while the crew was attempting a 3-engine takeoff.

The airplane departed on runway 31 in instrument meteorological conditions (IMC) and turned right to a heading of 090°. Radar contact (arts tag) was acquired about 1 to 2 miles north of the airport. Reportedly, the arts tag would typically be acquired as the airplane climbed through an altitude of about 700 feet agl. Subsequently, the airplane crashed about 2 miles north of the airport. A witness reported hearing a loud engine noise before the plane crashed. The wreckage path was oriented along a westerly heading and over an area of about 380 feet. There was evidence of an in-flight breakup. An outboard portion of the right wing was found about 150 feet from the main impact crater. An examination revealed the right wing had failed near the production seam. The right spar exhibited features 'typical of an upward bending overstress separation.' Examination revealed no other evidence of preimpact aircraft or engine malfunction. The airplane's gross weight was estimated to be about 4,696 pounds; its max limit was 4,300 pounds. The pilot's logbook indicated that he had flown only 2 instrument approaches in the previous 14 months. All three occupants were killed.