Accident Ilyushin Il-76TD CCCP-76466, Friday 20 October 1989
ASN logo
 

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 Il-76TD
Owner/operator:Aeroflot, Ulyanovsk Advanced Flying Training College
Registration: CCCP-76466
MSN: 0023440153
Year of manufacture:1982
Total airframe hrs:2053 hours
Cycles:2193 flights
Fatalities:Fatalities: 15 / Occupants: 15
Other fatalities:0
Aircraft damage: Destroyed, written off
Category:Accident
Location:near Leninakan Airport (LWN) -   Armenia
Phase: Approach
Nature:Cargo
Departure airport:Ulyanovsk/Baratayevka Airport (ULV/UWLL)
Destination airport:Leninakan Airport (LWN/UDSG)
Confidence Rating: Accident investigation report completed and information captured
Narrative:
The Ilyushin Il-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:
- 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

Sources:

Soviet Transports
ICAO Adrep Summary 5/89 (#50)
airdisaster.ru

Statistics

  • 37th worst accident in 1989
  • 13th worst accident of this aircraft type
  • 4th worst accident of this aircraft type at the time

Location

Revision history:

Date/timeContributorUpdates

The Aviation Safety Network is an exclusive service provided by:
Quick Links:

CONNECT WITH US: FSF on social media FSF Facebook FSF Twitter FSF Youtube FSF LinkedIn FSF Instagram

©2024 Flight Safety Foundation

1920 Ballenger Av, 4th Fl.
Alexandria, Virginia 22314
www.FlightSafety.org