Event Details

Title:Midair collision, Accident occurring July 1, 2002 involving a Boeing 757-200 and Tupolev Tu-154M (Recommended)
Micro summary:Midair collision between a Tu-154M and Boeing 757 results in both airplanes being destroyed.
Event Time:2002-07-01 at 2135
File Name:2002-07-01-DE.pdf
Publishing Agency:Federal Bureau of Aircraft Accidents Investigation (BFU)
Publishing Country:Germany
Report number:AX001-1-2/02
Site of event:(near) Ueberlingen/Lake of of Constance/Germany
First AirplaneSecond Airplane
Departure:Domodedovo International Airport, Moscow, RussiaOrio al Serio, Bergamo, Italy
Destination:Barcelona International Airport, El Prat de Llobregat, SpainNational Airport, Brussels, Belgium
Airplane Type(s):Tupolev Tu-154MBoeing 757-23APF
Flight Phase:DescentCruise
Operator(s):Bashkirian AirlinesDHL Aviation
Type of flight:RevenueCargo
Serious Injuries:00
Other Injuries:00
Executive Summary:The investigation was initiated by the BFU as soon as the information proved to be correct. On 2 July 2002 six BFU staff members arrived at the accident site. Because the two airplanes were under control of ACC Zurich during the time of the accident two other BFU staff members flew to Zurich in order to conduct the necessary investigation in cooperation with the Swiss accident investigation authority (BFU - Büro für Flugunfalluntersuchungen).

The investigation was carried out in accordance with the international Standards and Recommended Practices (SARPs) contained in ICAO Annex 13 and the German investigation law (FIUUG) under the responsibility of the BFU. The countries Kingdom of Bahrain, Russian Federation, Confoederatio Helvetica (Switzerland) and the USA were involved in the investigation through their Accredited Representatives and advisers. In the first phase of the investigation the investigation team worked simultaneously in a headquarter at the airport Friedrichshafen, at ACC Zurich, at the different accident sites in the area around the city of Ueberlingen and at the BFU in Braunschweig.

On 1 July 2002 at 21:35:32 hrs a collision between a Tupolev TU154M, which was on a flight from Moscow/ Russia to Barcelona/ Spain, and a Boeing B757-200, on a flight from Bergamo/Italy to Brussels/Belgium, occurred north of the city of Ueberlingen (Lake of Constance). Both aircraft flew according to IFR (Instrument Flight Rules) and were under control of ACC Zurich. After the collision both aircraft crashed into an area north of Ueberlingen. There were a total of 71 people on board of the two airplanes, none of which survived the crash.

The following immediate causes have been identified:

• The imminent separation infringement was not noticed by ATC in time. The instruction for the TU154M to descend was given at a time when the prescribed separation to the B757-200 could not be ensured anymore.

• The TU154M crew followed the ATC instruction to descend and continued to do so even after TCAS advised them to climb. This manoeuvre was performed contrary to the generated TCAS RA.

The following systemic causes have been identified:

• The integration of ACAS/TCAS II into the system aviation was insufficient and did not correspond in all points with the system philosophy.

The regulations concerning ACAS/TCAS published by ICAO and as a result the regulations of national
aviation authorities, operations and procedural instructions of the TCAS manufacturer and the operators were not standardised, incomplete and partially contradictory.

• Management and quality assurance of the air navigation service company did not ensure that during the night all open workstations were continuously staffed by controllers.

• Management and quality assurance of the air navigation service company tolerated for years that during times of low traffic flow at night only one controller worked and the other one retired to rest.
Learning Keywords:Operations - Airspace - Air Traffic Control
Operations - Airspace - Mid-Air Collision
Operations - Airspace - TCAS
Operations - Altitude Excursion
Other - Regulatory Oversight
Other - Workplace Culture or Management
Consequence - Hull Loss
Close match:Midair collision, Accident Investigation Report, Trans World Airlines Lockheed 1049A N6902C and United Air Lines Douglas DC-7 N6324C, over the Grand Canyon, Arizona, June 30, 1956
Midair Collision of Aeronaves De Mexico, S.A., McDonnell Douglas DC-9-32, XA-JED, and Piper PA-28-181, N4891F, Cerritos, California, August 31, 1986
Midair Collision, United States Air Force, F111-D, Building Contractors Inc., Cessna TU-206G, Clovis, New Mexico, February 6, 1980
Midair collision, Ozark Air Lines, Inc., DC-9, N970Z And Interstate Airmotive, Inc., Cessna 150F, N8669G, St. Louis, Missouri, March 27, 1968
Midair collision, American Airlines, Inc., Boeing 707-323, N7595A, and a Linden Flight Service, Inc., Cessna 150, N60942, Over Edison, New Jersey, January 9, 1971
Midair collision, Hughes Air West DC-9, N9345, and U. S. Marine Corps F-4B, 151458 Near Duarte, California, June 6, 1971
Midair collision, Pacific Southwest Airlines, Inc., Boeing 727-214, N533PS, Flight 182, Gibbs Flite Center, Inc., Cessna 172, N7711G, San Diego, California, September 25, 1978
Midair collision, Eastern Air Lines, Incorporated, McDonnel Douglas DC-9-31, N8943E, and a Cessna Model 206, N2110F, Raleigh-Durham Airport, Raleigh, North Carolina, December 4, 1971
Midair collision, North Central Airlines, Inc., Allison Convair 340/440, (CV-580) N90858, And Air Wisconsin Incorporated, DHC-6, N4043B, near Appleton, Wisconsin, June 29, 1972
Midair Collision, Piedmont Airlines Division Boeing 727, N68650 and Lanseair Inc. Cessna 310, N3121S, at Hendersonville, North Caroline, July 19, 1967


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