Test

Two engineers took over the airplane for an engine test run at Xi'an Airport. While parked on the apron, the aircraft started to roll on a slippery ground and eventually collided with the main terminal. Both occupants escaped uninjured while the aircraft was damaged beyond repair. It was reported that snow fell during the preceding days and that the tarmac was slippery.

The pilot, sole on board, was completing a post maintenance check flight after the engine was subject to several modifications. After takeoff from Roanne-Renaison Airport, while climbing to a height of 300 feet, the pilot initiated a left turn in a relative flat attitude and followed a perpendicular trajectory from the runway. Suddenly, it collided with a weather pylon (8 meters high), overturned and crashed, bursting into flames. The aircraft was destroyed and the pilot was killed.

The crew departed Colombo-Ratmalana Airport for a local post maintenance test flight as one of the engine has been changed. During climbout, an engine caught fire. The crew was cleared to return for an emergency landing when the engine exploded and separated from the aircraft. Out of control, the airplane crashed in an open field, bursting into flames. All five crew members were killed. It was reported that the engine that caught fire was not the one that has been changed.

The twin engine aircraft departed Fortaleza-Pinto Martins Airport on a local post maintenance test flight (50 hours), carrying two passengers and one pilot. After takeoff, while climbing to a height of 200 feet, the power on the left engine fluctuated. The pilot modified the position of the fuel selector but the situation did not change. As the aircraft was losing height, the pilot shut down the left engine and feathered its propeller when the aircraft rolled to the left, causing the left wing to struck a concrete wall. Out of control, the aircraft struck the roof of a house, then a second one and eventually crashed on a third residence. All three occupants were injured as well as one people on the ground.

The crew was completing a local post maintenance test flight at Laredo Airport. After several touch-and-goes, the aircraft was in initial climb when the left engine lost power, followed shortly later by the right engine. The crew reduced his altitude and ditched the aircraft in the Casa Blanca Lake, about 50 feet from the shore. All three crew members were evacuated safely while the aircraft sank in six feet of water.

The crew had originally planned to practice landings at an airport about 20 minutes away, then stop, refuel the airplane, and subsequently return to the original departure airport. Prior to the flight, the crew discussed fuel endurance, which was calculated to be 2 hours based on the captain's knowledge of the airplane's fuel consumption, and the quantity of fuel indicated on the gauges. The fuel tanks were not dipped. The flight was made at 1,500 feet msl. Upon reaching the practice airport, the crew conducted one full stop landing, then taxied back for takeoff. During takeoff, an engine had a momentary overspeed, and the crew decided to return to the original departure airport without refueling. Approaching the original departure airport, the airplane had to delay landing for about 7 minutes for a manual gear extension. Upon completion, it turned back toward the airport, and was about 6 miles from the runway when fuel pressure for one of the engines dropped. The boost pumps were turned on; however, the engine lost power. A low fuel pressure light then illuminated for another engine. The captain called for the flight engineer to switch fuel feed to another tank, but the flight engineer responded, "we're out of fuel." The remaining engines subsequently lost power, and the captain ditched the airplane into a bay. The time from first takeoff until ditching was 1 hour, 19 minutes. The airplane had flown 39 hours since restoration, and exact fuel capacities, fuel flow calculations and unusable fuel amounts had not been established. A dipping chart had been prepared, with one person in the cockpit and one person with a yardstick putting fuel in a main tank in 25-gallon increments. However, the data had not been verified, and dipping was not considered to be part of the pre-flight inspection.

A group of five technicians/engineers of the company was preparing the aircraft to be transferred to a hangar for maintenance. After engine startup, the power was reduced to idle after someone inadvertently pulled out the circuit breaker. The aircraft jumped the chocks and started to roll. Since the engine's power was in idle, the brakes and the nosewheel steering system were inoperative. The crew elected to reduce power on the left engine but mistakenly increased the power on the right engine by 90%. This caused the aircraft to rotate 80° when control was lost. The airplane rolled through a perimeter wall, causing the nose gear to collapse. All five occupants escaped uninjured while the aircraft was damaged beyond repair.

During a test flight, the airplane encountered an elevator system oscillation while in a high speed dive outside the normal operating envelope. The 17 second oscillation was recorded on the cockpit voice recorder and had an average frequency of 28 Hz. The aft elevator sector clevis (p/n 2331510-32) fractured due to reverse bending fatigue caused by vibration, resulting in a complete loss of elevator control. The flight crew reported that pitch control was established by using horizontal stabilizer pitch trim. The flightcrew stated that during final approach to runway 17 (13,337 feet by 200 feet, dry/asphalt) the aircraft's nose began to drop and that the flying pilot was unable to raise the nose using a combination of horizontal stabilizer trim and engine power. The aircraft landed short of the runway, striking an airport perimeter fence and a berm. The surface winds were from the south at 23 knots, gusting to 32 knots.

The crew was engaged in a local test flight at Ankara-Mürted AFB. Shortly after takeoff, while climbing to a height of about 100 feet, the aircraft went out of control and crashed, bursting into flames. All four crew members were killed. According to Turkish Authorities, this aircraft was the last of a series of eight CN-235 intended for the Turkish Navy and was still operated under the Turkish Coast Guard, taking part to a certification program. Several modifications have been made on this model by technicians from Turkish Aerospace Industries (TAI) and the crew consisted of four pilots, one Turkish and three Spanish from the Casa/EADS Consortium.

The aircraft departed Omsk Airport on a test flight to Yakutsk, carrying 22 passengers and a crew of 11 in order to perform a test flight in low-temperature flight conditions, as part of the Ukrainian manufacturer's certification program. During initial climb, at a height of 20 metres, the engine n°3 lost power. The crew increased power on all three other engines and continued to climb. Less than 25 seconds laters, at a height of about 60 metres, the engine n°1 failed. The captain attempted an emergency landing in a snow covered terrain located 660 metres past the runway end. The aircraft belly landed and came to rest with severe damages to the fuselage (almost broke in two at wings level) and engines. All 33 occupants were rescued, among them four were injured, two seriously.