Investigation Summary
The aircraft, operated by Ukrainian Cargo Airways under lease to the Congolese Ministry of Defense, was performing a two-hour military charter flight. The cargo hold was densely packed with approximately 160 to 200 passengers (some estimates range higher), including women and children, along with military vehicles and baggage. Approximately 45 minutes into the flight, while at an altitude of 10,000 feet (3,000m), the rear cargo ramp and door assembly failed. Survivors reported that the aircraft tilted violently as the door let loose, causing passengers who were sleeping or sitting near the rear to be ejected instantly. Some passengers managed to survive by clinging to internal netting, ropes, or a secured truck that acted as a physical barrier. Conflicting reports emerged regarding the cause of the door opening. A Congolese army sergeant claimed the door had been improperly fastened before takeoff and that the crew had made three unsuccessful attempts to secure it mid-flight before the final failure. Conversely, the pilot suggested that a passenger might have tampered with the 'special opening device' button or that a computer glitch was responsible. While some sources initially reported the aircraft was written off due to substantial damage, photographic evidence from 2007 shows UR-UCB in service, indicating it was repaired and returned to flight.
Final Conclusions
The investigation into the incident was marked by conflicting accounts and a lack of a formal published report. Theories regarding the cause of the door opening varied: a Congolese army sergeant alleged the door was improperly fastened before takeoff and failed after mid-flight attempts to secure it, while the pilot suggested a passenger may have activated a release button or that a computer glitch occurred. According to ASN Wikibase, the aircraft sustained substantial damage and was written off, although it successfully returned to Kinshasa for an emergency landing.
Video Analysis
No video analysis linked for this case file yet.
Airframe & Maintenance
Systems & Failure Modes
Rear Cargo Door/Ramp
The Il-76 features a two-part rear loading system consisting of a ramp that lowers and two 'clamshell' doors that open outward. The failure involved this assembly opening or separating under pressure.
Pressurization System
The aircraft was pressurized at the time of the incident; the sudden opening of the door caused a rapid decompression that ejected unsecured occupants.
Interesting Facts
- 01The aircraft was an Ilyushin Il-76MD manufactured in 1986 (MSN 0063467003).
- 02The flight was a military charter transporting soldiers and their families.
- 03The cargo hold lacked standard passenger seating; occupants were sitting on the floor or folding benches.
- 04Occupant counts are disputed, with reports ranging from 115 to over 200 people on board.
- 05Death toll estimates vary wildly between 7 (government) and 170 (diplomatic/airport sources).
- 06A secured truck in the cargo hold was credited with preventing more passengers from being sucked out.
- 07The aircraft was leased from Ukrainian Cargo Airways to the Congolese Ministry of Defense.
Safety Actions & Advisories
Grounding of Ukrainian Cargo Airways
Source ↗Following the accident and subsequent safety concerns, the Ukrainian State Aviation Administration suspended the airline's air operator certificate. The airline was later placed on the list of air carriers banned in the European Union due to safety deficiencies.
Known Controversies & Unanswered Questions
Disputed Fatality Count
Reference ↗The Congolese government officially confirmed only 7 to 17 deaths, whereas airport officials, western diplomats, and survivors estimated the toll was between 129 and 170 people.
Cause of Door Opening
Reference ↗Survivors and military personnel claimed the door was known to be faulty before takeoff, while the pilot alleged a passenger might have pressed a release button or a computer glitch occurred.