Voronezh Aircraft Production Association - VASO Airlines | Bureau of Aircraft Accidents Archives

The aircraft departed Voronezh-Pridacha Airport in the morning to conduct a test flight with six crew on board, two pilots from the manufacturer, two engineers and two pilots from the Myanmar Air Force to whom the aircraft should be delivered. In flight, the crew decided to perform an emergency descent. During this manoeuvre, the aircraft reached an excessive speed and lost part of its tail, stabilizers and elevators. It entered an uncontrolled descent and crashed in a snow covered field located near Garbuzovo, bursting into flames. The aircraft was totally destroyed and all six occupants were killed. Tail parts, stabilizers and elevators were later found about 3 km from the point of impact. The airplane was operated by the Voronezh Aircraft Production Association. (VASO - Voronezhskoye Aktsionernoye Samoletostroitelnoe Obshestvo). First accident involving an Antonov AN-148.

Probable cause:

The cause of the accident was the inadvertently permitted the aircraft to accelerate 110 km/h above the design limit speed during an emergency descent. This led to low-frequency vibrations on the aircraft in all axes, an increase of alternating accelerations exceeding the margin of safety. The result was the break up of the aircraft in the air, followed by its collision with the earth.
The main factors contributing to the accident were:
- Untimely and inadequate actions of the crew to control the emergency decent,
- Lack of proper coordination among the members of the crew,
- Deviations from recommendations in the flight manual in executing the emergency descent,
- Misleading indications on basic instruments when outside characteristic operating conditions.

RA-86066

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RA-86115

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RA-86066

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Crash of an Ilyushin II-76TD in Anadyr

Date & Time: Jan 25, 1997 at 1454 LT

Type of aircraft:

Ilyushin II-76

Operator:

Registration:

RA-76834

Flight Phase:

Takeoff (climb)

Flight Type:

Positioning

Survivors:

Yes

Site:

Airport (less than 10 km from airport)

Schedule:

Anadyr – Magadan – Moscow

MSN:

10234 09319

YOM:

1992

Location:

Country:

Region:

Crew on board:

Crew fatalities:

Pax on board:

Pax fatalities:

Other fatalities:

Total fatalities:

Aircraft flight hours:

3309

Aircraft flight cycles:

1083

Circumstances:

During the takeoff roll, at a speed of 290 km/h, the copilot started the rotation. The aircraft lifted off, reached a height of 7 metres then entered a left bank of 3,5°. Following a course of 665 metres, the aircraft entered a critical angle of attack, nosed up to 35° then landed back on the runway while the undercarriage have just been retracted. The aircraft slid on its belly and came to rest 270 metres further, about 120 metres to the left of the runway centerline. All 25 occupants were rescued, among them two were seriously injured. The aircraft was damaged beyond repair.

Probable cause:

It was determined that the captain decided to seat on the right front seat, letting the command to the copilot seating in the left front seat, which was against the published procedures because the copilot was not authorized and did not have sufficient experience. The copilot forgot to extend the flaps in an appropriate angle for the takeoff procedure, which caused the aircraft to adopt a critical angle of attack after liftoff and to stall. Successives errors and poor crew coordination were considered as contributing factors as well as the fact that the crew failed to follow the pre-takeoff checklist and failed to identify that the aircraft was not properly configured for the takeoff procedure.