Crash of a Scottish Twin Pioneer 1 in Fezzan: 6 killed

Date & Time: Dec 7, 1957
Operator:
Registration:
G-AOEO
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Wadi al Ashtan – Tripoli
MSN:
503
YOM:
1956
Location:
Country:
Region:
Crew on board:
2
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
6
Aircraft flight hours:
564
Circumstances:
On 7 December the aircraft flew down to Fezzan from Idris Airport to the Esso (Petroleum Ltd.) camp at Wadi al Atshan - a flight of some 400 miles. From Atshan it made one local flight of 45 minutes duration. The aircraft was then refuelled at Atshan and set off at 1427LT for the return journey to Idris Airport where it was expected to arrive at 1800LT with 2 crew and 4 passengers aboard. When the aircraft failed to arrive, a series of radio checks were carried out followed by a widespread air and surface search. The wreckage was sighted the next day. The aircraft was destroyed by impact forces and all six occupants have been killed.
Probable cause:
The accident Was the result of the failure in fatigue of the forward tube of the "V brace" structure in the outer panel of the port wing. This failure led to the breaking away of the outer panel of the port wing from the aircraft in flight. The aircraft was then rendered completely uncontrollable and dived vertically to the ground.
Final Report:

Crash of a Lockheed L-749 Constellation near Khartoum

Date & Time: Jul 10, 1957 at 0920 LT
Operator:
Registration:
ET-T-35
Flight Phase:
Survivors:
Yes
Site:
Schedule:
London – Athens – Khartoum – Addis Ababa
MSN:
2608
YOM:
1949
Flight number:
ET003
Country:
Region:
Crew on board:
6
Crew fatalities:
Pax on board:
14
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
The aircraft left Khartoum International Aerodrome at 0555 hours GMT on 10 July carrying a crew of 6 and 14 passengers and was cleared to cruise at 17 500 feet. At 0610 hours, at about 10 500 feet altitude, the number two engine fire warning light for zones 2 and 3 came on and the warning bell rang. The engine was feathered. The CO2 bottle was released and concurrently an explosion followed by a violent fire, made it necessary (at approximately 0620) to land the aircraft with gear up on a large flat cultivated area. There were no injuries to passengers or crew, but the aircraft was almost totally destroyed by fire which continued burning on the ground.
Probable cause:
This accident was due to the overheating of one of the brakes of the main landing gear during the aircraft's taxiing and take-off run. It was caused by a dragging brake and a leakage of hydraulic oil with resultant fire and tire blow out. The tire blow out resulted in damage to hydraulic oil and fuel lines within the confined area of No. 2 engine nacelle, between the rear of the engine fire wall and rear spar, and between the fuselage and left side of the landing gear wheel well doors.
Final Report:

Crash of a De Havilland DH.89A Dragon Rapide near Benghazi

Date & Time: May 27, 1957
Registration:
G-AKTZ
Survivors:
Yes
Site:
MSN:
6482
YOM:
1948
Country:
Region:
Crew on board:
1
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Upon landing in a desert area in Benghazi, a tire burst. The airplane came to rest and was damaged beyond repair. All four occupants escaped uninjured.
Probable cause:
Tire burst on landing.

Crash of a Vickers 607 Valetta C.1 in Shihr

Date & Time: May 7, 1957
Type of aircraft:
Operator:
Registration:
VW184
Flight Phase:
Flight Type:
Survivors:
Yes
Site:
MSN:
340
YOM:
14
Country:
Region:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
En route, an engine failed and the crew was forced to shoot it down and to feather the propeller. Shortly later, the second engine failed as well. The pilot decided to attempt an emergency landing. The airplane crash landed in a desert area located 4,8 km east of Shihr and was damaged beyond repair. There were no casualties.
Probable cause:
Double engine failure in flight.

Crash of a Curtiss C-46A-60-CK Commando near Arica

Date & Time: Apr 11, 1957
Type of aircraft:
Operator:
Registration:
CC-CNC-466
Flight Phase:
Survivors:
Yes
Site:
MSN:
443
YOM:
1945
Country:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed in unknown circumstances near Arica. There were no injuries.

Crash of a Boeing KC-97G-26-BO Stratotanker near Walker AFB: 11 killed

Date & Time: Jun 26, 1956
Type of aircraft:
Operator:
Registration:
52-2700
Flight Phase:
Flight Type:
Survivors:
No
Site:
MSN:
16731
YOM:
1952
Crew on board:
11
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
11
Circumstances:
Few minutes after takeoff from Walker AFB, while climbing by night, a propeller blade detached from the engine number two, penetrated the fuselage and pierced a fuel tank. The aircraft caught fire, exploded and crashed in a desert area located 8 miles south of the airbase. All 11 crew members were killed.
Probable cause:
Loss of a propeller blade during initial climb.

Crash of a Douglas DC-6B near Cairo: 52 killed

Date & Time: Feb 20, 1956 at 0345 LT
Type of aircraft:
Operator:
Registration:
F-BGOD
Survivors:
Yes
Site:
Schedule:
Saigon – Calcutta – Karachi – Bahrain – Cairo – Paris
MSN:
43835
YOM:
1953
Location:
Country:
Region:
Crew on board:
9
Crew fatalities:
Pax on board:
55
Pax fatalities:
Other fatalities:
Total fatalities:
52
Circumstances:
The aircraft was on a scheduled flight from Saigon to Paris, France and had left Karachi for Cairo on 19 February at 1715 hours Greenwich Mean Time with 9 crew and 55 passengers aboard. The flight was routine until 0230 hours (20 February) when the aircraft reported to Cairo Air Traffic Control that it had passed Suez (60 miles east of Cairo) at 0224 at a flight level of 8 500 feet, flying VFR and was descending. At 0240 it reported the Cairo aerodrome in sight and being 15 miles out, was granted an authorization for a VFR approach and at the same time was given the QFE and QNH, 29.42 and 29.73 respectively. Contact was established with Cairo approach and the aircraft requested and received landing instructions oh 118.5 megacycles and was asked to call down wind. This message was acknowledged and was the last heard from the flight. Several attempts to contact the aircraft on all available frequencies were made but were unsuccessful. At 0450 hours the wreckage was sighted 18 miles southeast of the aerodrome. Only 6 crew members and 6 passengers survived.
Probable cause:
The accident was due to the failure of the pilot-in-command to monitor the co-pilot during a direct approach procedure and the reliance of the latter on his instruments exclusively to fix his position relative to the runway at an altitude below the minimum safe altitude. The factor of crew member fatigue can- not be ruled out
Final Report:

Crash of a Lisunov LI-2 near Balkhash Lake: 6 killed

Date & Time: Dec 21, 1955 at 0645 LT
Type of aircraft:
Operator:
Registration:
CCCP-L4981
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Almaty – Balkhash – Moscow
MSN:
2 34 433 07
YOM:
22
Flight number:
SU090
Country:
Region:
Crew on board:
5
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
6
Aircraft flight hours:
4023
Circumstances:
The aircraft left Almaty Airport at 0515LT bound for Moscow via Balkash, carrying one passenger, five crew members, 763 kilos of various goods and 683 kilos of mail. Upon departure, the total weight of the aircraft was 10,722 kilos, 22 kilos above MTOW. Enroute to Balkash, the crew encountered poor weather conditions. While flying in clouds, some instruments failed. The pilot-in-command lost his orientation and then the control of the aircraft that dove into the ground and crashed in a snow covered area located about 105 km southeast of the Balkash Lake. It was determined that the aircraft hit the ground in a 65° nose-down angle at high speed and disintegrated on impact, causing the debris to be scattered on more than 200 meters. All six occupants were killed.
Probable cause:
Failure of a vacuum regulator which cause the dysfunction of the gyrocompas and then the automatic pilot system. While cruising in very low visibility (night and clouds), the crew suffered a spatial disorientation and lost control of the airplane.

Crash of an Avro 685 York C.1 in Al Seeba

Date & Time: Sep 14, 1955
Type of aircraft:
Operator:
Registration:
EP-ADA
Flight Phase:
Survivors:
Yes
Site:
Schedule:
Abadan – Kuwait City
MSN:
MW231
YOM:
1945
Country:
Region:
Crew on board:
4
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
About eight minutes after takeoff from Abadan Airport, while on a short flight to Kuwait City, the crew was flying at an altitude of 500 feet when power was lost on engine number three and four. The propeller on engine four was feathered and the crew contacted ATC for to return to Abadan for a safe landing. As the airplane lost height, the captain eventually decided to attempt an emergency landing in a desert area located in Al Seeba, at the border between Iraq and Iran. The aircraft belly landed and was damaged beyond repair. All 13 occupants were evacuated safely.
Probable cause:
Mismanagement of the fuel pumps on part of the flying crew after departure from Abadan Airport. There was less than 100 gallons of fuel on the right tank at the time of the accident, which was not sufficient and thus considered as a contributing factor.

Crash of a Convair B-36J-5-CF Peacemaker near Sterling City: 15 killed

Date & Time: May 25, 1955 at 2305 LT
Type of aircraft:
Operator:
Registration:
52-2818
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Walker - Walker
MSN:
374
YOM:
1952
Flight number:
Abbott 27
Crew on board:
15
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
15
Circumstances:
While conducting a training mission from Walker AFB, the crew encountered poor weather conditions with thunderstorm activity and turbulences. The airplane lost wing panels, went out of control and crashed in a flat attitude in a desert area located 18,5 miles southwest of Sterling City. All 15 crew members were killed.
Probable cause:
Loss of control caused by heavy turbulences in thunderstorm activity.