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Accident description
Last updated: 22 October 2017
Status:
Date:Friday 20 October 1989
Time:02:32
Type:Silhouette image of generic IL76 model; specific model in this crash may look slightly different
Ilyushin 76TD
Operator:Aeroflot, Central Region Civil Aviation Directorate
Registration: CCCP-76466
C/n / msn: 0023440153
First flight: 1982
Total airframe hrs:2053
Cycles:2193
Crew:Fatalities: 10 / Occupants: 10
Passengers:Fatalities: 15 / Occupants: 15
Total:Fatalities: 25 / Occupants: 25
Airplane damage: Damaged beyond repair
Location:near Leninakan Airport (LWN) (   Armenia)
Phase: Approach (APR)
Nature:Cargo
Departure airport:Ulyanovsk-Vostochny Airport (ULY/UWLW), Russia
Destination airport:Leninakan Airport (LWN/UDSG), Armenia
Narrative:
The Ilyushin 76 cargo plane departed Ulyanovsk on a training/cargo flight to Leninakan. The aircraft carried a cargo of 37200 kg. Approaching Leninakan the flight was cleared to descend to 3300 metres. During the descent the approach controller reported the airport pressure being 637 mm Hg. After issuing a further clearance down to 1100 metres, the controller corrected the airport pressure to 637 mm Hg. Erroneously the crew programmed their barometric altimeters using 736 instead of 636 mm Hg, causing a difference in altitude indication of about 1100 metres. Descent was continued at a vertical speed of 10 m/sec. At a height of 270 metres the GPWS alarm began to sound and continued to 19 seconds. Then the flight engineer suddenly informed the captain of the mistake, but no corrective action was taken. Ten seconds later the aircraft struck terrain and crashed.

Probable Cause:

PROBABLE CAUSE:
- error by the crew in programming both barometric altimeters using the 736 mm Hg pressure instead of the actual 636 mm Hg causing a descent below MDA;
- failure to use the radio altimeters, which deprived the crew of additional information about their descent below MDA;
- failure of the crew to respond to the recommendation by the flight engineer to climb;
Factors were:
- the fact that it was the instructor captain's first flight into Leninakan and the student pilot's (in the right hand seat) first flight on an Il-76;
- insufficient crew resource management;
- insufficient training of pilots regarding the actions to be taken in case of a GPWS warning

Classification:
Controlled Flight Into Terrain (CFIT) - Ground

Sources:
» Soviet Transports
» ICAO Adrep Summary 5/89 (#50)


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Map
This map shows the airport of departure and the intended destination of the flight. The line between the airports does not display the exact flight path.
Distance from Ulyanovsk-Vostochny Airport to Leninakan Airport as the crow flies is 1550 km (969 miles).
Accident location: Global; accuracy within tens or hundreds of kilometers.

This information is not presented as the Flight Safety Foundation or the Aviation Safety Network’s opinion as to the cause of the accident. It is preliminary and is based on the facts as they are known at this time.
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Ilyushin Il-76

  • 938+ built
  • 18th loss
  • 9th fatal accident
  • 4th worst accident (at the time)
  • 8th worst accident (currently)
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 Armenia
  • 2nd worst accident (at the time)
  • 4th worst accident (currently)
» safety profile