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Crash of an Ilyushin II-78 in Asmara: 10 killed

Date & Time: Jul 17, 1998 at 0415 LT
Type of aircraft:
Operator:
Registration:
UR-UCI
Flight Type:
Survivors:
No
Schedule:
Burgas - Asmara
MSN:
0834 14444
YOM:
1978
Flight number:
UKS701
Location:
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
10
Circumstances:
Following an uneventful cargo flight from Burgas, the crew started a night approach to Asmara-Yohannes IV Airport. The visibility was relatively limited due to local patches of fog on approach. On final, at an altitude of 2,405 metres, the aircraft struck the slope of a mountain located 4,3 km short of runway 25. The aircraft disintegrated on impact and all 10 occupants were killed. The wreckage was found 72 metres below the summit. Remains still present at N15.304268 E38.959811 by December 2012.
Probable cause:
The following findings were identified:
- The crew decided to perform a visual approach to runway 25 while an instrument approach to runway 07 was the normal procedure,
- Limited visibility due to marginal weather conditions,
- ATC cleared the crew for an approach to runway 25 which was non-compliant according to published procedures,
- The crew failed to initiate a go-around procedure,
- The total weight of the aircraft at takeoff from Burgas Airport was at least 37 tons above MTOW and the crew was probably not aware of this situation.

Crash of a Beechcraft 200 Super King Air in Burgas: 6 killed

Date & Time: Jul 27, 1977
Operator:
Registration:
D-IBAF
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Burgas - Stuttgart
MSN:
BB-93
YOM:
1976
Location:
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
6
Circumstances:
The twin engine airplane was engaged in an ambulance flight from Burgas to Stuttgart on behalf of the German Air Rescue Service (Deutsche Rettungsflugwacht - DRF), carrying one German patient aged 63, three medical staff and two pilots. During initial climb, the crew contacted ATC and reported technical problems with the automatic pilot system. Shortly later, control was lost and the airplane crashed in an open field. The airplane was totally destroyed upon impact and all six occupants were killed. The exact cause of the autopilot system failure remains unknown. Nevertheless, it was reported that both pilots were intoxicated at the time of the accident, with an alcohol level of 0,48‰ et 0,37‰ respectively.

Crash of an Ilyushin II-14 near Smolyan: 35 killed

Date & Time: Nov 4, 1972 at 2002 LT
Type of aircraft:
Operator:
Registration:
LZ-ILA
Survivors:
No
Site:
Schedule:
Burgas - Sofia
MSN:
1460 010 46
YOM:
1956
Location:
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
31
Pax fatalities:
Other fatalities:
Total fatalities:
35
Circumstances:
During the preflight briefing, the crew was informed about poor weather conditions in Sofia and that the visibility was below minima. The airplane departed Burgas Airport at 1901LT and en route, the captain decided to divert to Plovdiv where weather conditions were considered as better. First radio contact with approach control in Plovdiv was established at 1950LT and the crew was cleared to descent. Twelve minutes later, while descending by night and limited visibility, the airplane struck the slope of a mountain located in the Rhodopes Mountain Range, near the city Smolyan. The wreckage was found few hours later about 56 km southwest of Plovdiv Airport. All 35 occupants have been killed.
Probable cause:
It was determined that the first radio contact was established with a civilian controller at 1950LT. Four minutes later, this controller was relieved by a military controller who cleared the crew to descent without knowing the exact position of the airplane that descended below the minimum descent altitude. The lack of visibility was considered as a contributing factor.

Crash of an Ilyushin II-62 in Königs Wusterhausen: 156 killed

Date & Time: Aug 14, 1972 at 1701 LT
Type of aircraft:
Operator:
Registration:
DM-SEA
Flight Phase:
Survivors:
No
Schedule:
Berlin - Burgas
MSN:
00702
YOM:
1970
Country:
Region:
Crew on board:
8
Crew fatalities:
Pax on board:
148
Pax fatalities:
Other fatalities:
Total fatalities:
156
Captain / Total flying hours:
8100
Copilot / Total flying hours:
6041
Aircraft flight hours:
3520
Circumstances:
The four engine aircraft departed Berlin-Schönefeld Airport at 1630LT on a charter flight to Burgas, carrying 148 passengers (144 East German citizens, three Austrians and one unknown nationality) and eight East-German crew members. Thirteen minutes later, while cruising at an altitude of 29,200 feet, the crew informed ATC about technical problems and was cleared to return to Berlin. The dumping fuel system was activated at 1651LT and three minutes later, as the situation worsened, the captain started an emergency descent. At 1659LT, he informed ATC that he was losing control of the airplane and declared a fire on board. Shortly later, the empennage detached and totally out of control, the airplane dove into the ground and crashed in flames in a wooded area located in Königs Wusterhausen, about 11 km southeast of Berlin-Schönefeld Airport. The aircraft was totally destroyed and none of the 156 occupants survived the crash. Up to date, this was the worst aircraft crash in the European History.
Probable cause:
A hot-air tube in the rear of the airplane had contained a leak for some time. During the operation of the plane hot air with temperatures of around 300 degrees C had caused a weakening of the insulation material of electricity wires and the airplane controls. Immediately after takeoff on the ill-fated flight, a short-circuit occurred. Sparks with a temperature of up to 2000 degrees C caused substantial melting and ultimately a fire in the nr. 4 cargo bay which was located in the rear of the plane. The fire weakened the fuselage structure, causing the tail section to fail in-flight.

Crash of an Ilyushin II-18E in Burgas: 47 killed

Date & Time: Sep 3, 1968 at 2030 LT
Type of aircraft:
Operator:
Registration:
LZ-BEG
Survivors:
Yes
Schedule:
Berlin - Sofia - Burgas
MSN:
187 0091 01
YOM:
1967
Location:
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
80
Pax fatalities:
Other fatalities:
Total fatalities:
47
Circumstances:
The four engine aircraft was completing a charter flight from Berlin to Burgas with an intermediate stop in Sofia, carrying 80 East-German tourists who were flying on holidays to Burgas, on the shore of the Black Sea. While descending to Burgas, the crew encountered poor weather conditions with low clouds, rain falls and thunderstorm activity. On final, the four engine aircraft was too low, struck obstacles and crashed in flames few hundred meters short of runway threshold. Five crew members and 42 passengers were killed while 39 other occupants were injured. The aircraft was totally destroyed.
Probable cause:
The crew apparently took the decision to continue the approach under VFR mode in IMC conditions. In violation to the published procedures, the crew descended below the glide and continued the final approach at an insufficient altitude, causing the aircraft to struck obstacles and to crash.