1997 Namibia mid-air collision

On 13 September 1997, a German Air Force Tupolev Tu-154M observation aircraft and a United States Air Force C-141B Starlifter transport aircraft were destroyed in a mid-air collision while cruising at 35,000 feet (11,000 m) off the coast of Namibia. All 33 people on board both aircraft were killed. At the time of the collision, the Tupolev was flying on a southerly route from Niamey, Niger, to Cape Town, South Africa, while the C-141 was heading northwest from Windhoek, Namibia, to Ascension Island.[1]

1997 Namibia mid-air collision
Accident
Date13 September 1997 (1997-09-13)
SummaryMid-air collision
Site65 miles west of Namibia
18°30′S 11°03′E
Total fatalities33 (all)
First aircraft

A C-141B, similar to the one involved in the accident.
TypeC-141B Starlifter
OperatorUnited States Air Force
Registration65-9405
Flight originHosea Kutako International Airport (WDH/FYWE), Windhoek, Namibia
DestinationGeorgetown-Wideawake Field, Ascension Island
Occupants9
Passengers0
Crew9
Fatalities9 (all)
Survivors0
Second aircraft

11+02, the Tu-154M involved in the incident in September 1993
TypeTupolev Tu-154M
OperatorGerman Air Force
Registration11+02
Flight originNiamey Airport (NIM/DRRN), Niger
DestinationCape Town International Airport, South Africa
Occupants24
Passengers14
Crew10
Fatalities24 (all)
Survivors0

Neither aircraft was equipped with TCAS collision avoidance systems, and although both crews had filed a flight plan, the German aircraft was not in contact with Namibian air traffic control and controllers were unaware of its presence in Namibian airspace. Furthermore, the Tupolev was flying at the wrong altitude, according to its flight plan and to the semicircular rule.

The subsequent US Air Force inquiry concluded that the German crew was responsible for the accident, citing pilot error and inadequate air traffic control that contributed to the fatal lack of separation.[2]

A year before the accident, the International Federation of Airline Pilots' Associations had stated that from a safety point of view, 75 percent of African airspace was "critically deficient."[3]

Aircraft and crew

The Lockheed C-141 Starlifter was a four-engine strategic airlifter in service with the US Air Force. The example involved in the accident, a C-141B variant, tail number 65-9405, was assigned to the 305th Air Mobility Wing based at McGuire Air Force Base, New Jersey. At the time it was conducting a humanitarian flight to Namibia, delivering a mine-clearing team for the United Nations.[4] The aircraft, using the callsign REACH 4201, was under the command of Captain Peter Vallejo, 34, with Captain Jason Ramsey, 27, and Captain Gregory M. Cindrich, 31, acting as pilots. Six other personnel were on board as well, including a crew chief, two flight engineers, and two loadmasters.[5][6]

The Tupolev Tu-154M involved, tail number 11+02, was one of two in the Luftwaffe inventory, both inherited from the East German Air Force. Assigned to 1 Staffel/Flugbereitschaft, it had previously been used for verification purposes under the Open Skies Treaty. As such it was equipped with cameras and sensors in the fuselage.[7] The aircraft was manned by a crew of 10 and was flying 14 passengers, which included 12 German marines and two of their spouses from Cologne, Germany to Cape Town, South Africa, for a regatta celebrating the 75th anniversary of the South African Navy. The pilots, both experienced, were Ralph Reinhold and Klaus Ehrlichmann.[8] Flying under the callsign GAF 074, the aircraft had made a stopover in Niamey and was due to land in Windhoek for another refueling stop before continuing on to Cape Town.[9]

Flight and collision

Flight paths
Collision
Windhoek
Map of Namibia showing the estimated location of the collision

The Luftwaffe Tu-154M departed Cologne, Germany on 13 September 1997 and landed in Niamey, Niger to refuel. While in Niger, the crew filed a flight plan requesting a cruise altitude of 35,000 feet with an en route climb to 39,000 feet. At 10:35 UTC, GAF 074 departed Niamey and began flying on a southerly track. While flying through Gabonese airspace, GAF 074 received a slight reroute. The aircraft changed altitude as it passed western Africa and turned in an easterly direction, in compliance with airway requirements.

At 14:11 UTC, the United States Air Force C-141B departed from Windhoek, Namibia for Ascension Island, a British territory in the South Atlantic. Per REACH 4201's filed flight plan it was flying on a northwesterly track at a cruise altitude of 35,000 feet. Visual meteorological conditions prevailed at the time of the aircraft's departure.[10]

Air traffic control

In 1996, the International Federation of Airline Pilots' Associations (IFAPA) labeled 75% of African airspace as "critically deficient." due to safety concerns and poor air traffic control service. The situation was so severe that in the same year, South African airline pilots reported more than 70 near-misses while flying in the African continent.[3]

The C-141B was under the control of Namibian air traffic control upon taking off from Windhoek. Namibian controllers had not received a flight plan or a departure signal from the Tu-154M and were not aware that the German aircraft had entered its flight information region. The last agency to have contact with the German aircraft was Accra air traffic control. Air traffic control authorities in Luanda, Angola had not contacted Namibian controllers to inform them of the aircraft's presence as required under ICAO regulations. The Tu-154M had changed altitude during its flight without the controllers' knowledge. Contributing to the communications breakdowns, the Aeronautical Fixed Telecommunication Network, a system that facilitates the exchange of messages between air controllers was not working at the time. The air traffic control center in Windhoek received the last communication from the C-141B crew via high-frequency radio, who stated they were level at 35,000 feet.[11]

Collision

At 15:10 hours UTC, sixty-five nautical miles off the coast of Namibia, the two aircraft collided. The Tu-154M struck the C-141B in the lower fuselage, causing an explosion that was observed as a bright flash by a US surveillance satellite overflying the area.[12] Cockpit voice recordings show that at least one crew member in the Tu-154M noticed the C-141B and had attempted to maneuver away, unsuccessfully. A transcript from the CVR shows that the American crew were not killed on impact. One of the pilots can be heard saying, "oxygen mask, get them on, get them on. Get the flashlights quick."[13] In addition, a nearby French Air Force aircraft reported that it picked up one "mayday" distress call.[14] Both aircraft crashed into the sea, ultimately killing all 33 passengers and crew aboard both airplanes.

Search and recovery

ATC authorities in Ascension Island attempted fifty times to contact aviation authorities in Namibia when the C-141B did not arrive as scheduled. At 10:55 UTC the following day, Ascension ATC contacted Air Mobility Command and notified them of the overdue aircraft. At 11:00 UTC, the aircraft was declared missing. An international search effort by the United States, France, Great Britain, Germany, and several African countries ensued, scouring the seas off Namibia for any signs of wreckage. A French aircraft flying over the apparent crash site picked up a faint signal from one of the aircraft's emergency beacons.[15] The South African Air Force stated it had received a signal from a life jacket emergency beacon, raising the hope of finding survivors. A mid-air collision was presumed to be the most likely scenario since both aircraft had gone missing at the same time in virtually the same location.[16] The first pieces of wreckage were found by a search ship in 16 September.[17] Six days after the crash, authorities announced they had found the body of 43 year old German flight attendant Saskia Neumeyer, the first body to be recovered.[18]

By December 1997, very few remnants of the crash had been discovered. The body of Saskia Neumeyer had been the only one of the 33 missing passengers and crew to be recovered and very little of the wreckage had been found. A fishing trawler discovered several pieces of clothing on 13 December from a depth of 655 meters.[19] The remains of Captain Peter Vallejo and Captain Jason Ramsey were located by divers later in December 1997 along with unidentifiable skeletal remains of other crewmembers. They were buried on 2 April 1998 in Arlington National Cemetery.[20]

Investigation and aftermath
Memorial plaque to the passengers of the Luftwaffe Tu-154M

In 1997, the United States Air Force appointed Colonel William H. C. Schell Jr. to lead the investigation into the collision. A final report with the board's conclusions was released in March 1998. The investigation blamed primarily the German crew, who were cruising at 35,000 feet in breach of the semicircular rule, which states that an aircraft heading in a southeasterly direction must fly at an altitude of either 29,000, 33,000, 37,000 or 41,000 feet. The Luftwaffe also acknowledged that its aircraft was at fault in the crash in its own investigative report.

In addition the report cited systemic problems in Africa's air traffic control system as contributing factors to the accident, blaming faulty communications equipment that prevented the German aircraft's flight plan from being transmitted through the proper channels and negligent controllers in Luanda who failed to pass on the aircraft's position to Namibian ATC. Another substantially contributing factor was the complicated and sporadic operation of the Aeronautical Fixed Telecommunications Network (AFTN).[21]

The report stated that if either aircraft had been equipped with a TCAS it is highly likely the crash could have been avoided, reading, "the presence of a fully operational TCAS on either aircraft could have prevented the accident."[22] One day before the release of the report, Secretary of Defense William S. Cohen announced that the military would begin the installation of TCAS on its aircraft.[23][24]

The lack of a TCAS on the German aircraft brought considerable pressure on Germany's Federal Ministry of Defence to install collision avoidance systems on its aircraft.[25] Despite being listed on the Project Objective Memorandum of the C-141B for five years, installation of the TCAS began on a small number of the aircraft soon after the crash.[26]

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See also
  • Charkhi Dadri mid-air collision
  • Überlingen mid-air collision

References
  1. "U.s., German Planes Apparently Collide Off Africa". tribunedigital-chicagotribune. 1997-09-15. Retrieved 2018-01-24.
  2. "Pilot error may have caused Namibia crash - December 12, 1997". CNN. 1997-12-12. Retrieved 2018-01-24.
  3. Dellios, Hugh (1997-11-30). "Safety Flying Standby In Africa". Chicago Tribune. Retrieved 2018-05-20.
  4. Patterson, Michael Robert (1999-04-18). "Gregory M. Cindrich, Captain, United States Air Force". Arlington National Cemetery Website Title Page. Retrieved 2018-01-24.
  5. Cohen, Tom (1997-09-16). "Search finds airplane seats, papers but no survivors". southcoasttoday.com. Retrieved 2018-01-24.
  6. Congressional Record. Government Printing Office. June 2011. pp. 7288–. GGKEY:DTQT57BKN6P.
  7. Brochure "Open Skies, German Observation System" of the Federal Armed Forces Verification Center, 52503 Geilenkirchen
  8. Online, Spiegel. "FLUGZEUGABSTURZ: Kein Geld für Sicherheit - DER SPIEGEL 39/1997". SPIEGEL ONLINE - Aktuelle Nachrichten (in German). Retrieved 2018-01-25.
  9. "Skeleton Coast crash `one in a million'". The Independent. 1997-09-16. Retrieved 2018-01-24.
  10. "Accident C-141 65-9405 & Luftwaffe 74". Code7700. 2017-10-18. Archived from the original on 2019-08-23. Retrieved 2018-01-25.
  11. "Military-transport losses raise African mid-air collision fears". flightglobal.com. Retrieved 2018-01-24.
  12. "View my Military Service on Togetherweserved.com". TogetherWeServed. 1997-10-13. Retrieved 2018-01-25.
  13. Patterson, Michael Robert (1999-04-18). "Gregory M. Cindrich, Captain, United States Air Force". Arlington National Cemetery Website Title Page. Retrieved 2018-01-25.
  14. "C-141 Lifetime Mishap Summary". C141Heaven Home Page. 1963-12-17. Retrieved 2018-01-25.
  15. "All there is to know, and lots more, about the Lockheed C141 Starlifter!". C141Heaven. 1998-04-02. Archived from the original on 2017-07-01. Retrieved 2018-01-25.
  16. "U.S., German Planes Missing Off Africa; Collision Feared". latimes. 1997-09-15. Retrieved 2018-01-25.
  17. "First wreckage of U.S. plane identified off Namibia - Sept. 16, 1997". CNN. 1997-09-16. Retrieved 2018-01-25.
  18. "Body Found in Search for Downed U.S., German Planes". latimes. 1997-09-19. Retrieved 2018-01-25.
  19. "Wreckage found off Namibian coast". News24. 2000-12-13. Retrieved 2018-01-25.
  20. Patterson, Michael Robert (1998-04-06). "C-141 Crew Laid To Rest In Arlington National Cemetery". Arlington National Cemetery Website Title Page. Retrieved 2018-01-25.
  21. Ranter, Harro (1997-09-13). "ASN Aircraft accident Tupolev Tu-154M 11+02 Namibia". Aviation Safety Network >. Retrieved 2018-01-25.
  22. Colonel Bill Grimes, USAF Retired (2014). The History of Big Safari. Archway Publishing. pp. 208–. ISBN 978-1-4808-0456-2.
  23. Hanley, Robert (1998-04-01). "German Plane Found at Fault In Collision With Air Force Jet". The New York Times. Retrieved 2018-01-25.
  24. "German airplane caused crash, U.S. Air Force says". DeseretNews.com. 1998-03-31. Retrieved 2018-01-25.
  25. Hans-Joachim Ebermann; Joachim Scheiderer (15 December 2012). Human Factors on the Flight Deck: Safe Piloting Behaviour in Practice. Springer Science & Business Media. pp. 16–. ISBN 978-3-642-31733-0.
  26. Robert Hewson (2001). The Vital Guide to Military Aircraft. Airlife. ISBN 978-1-84037-065-2.
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