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Crash of a Lockheed L-188A Electra in Dawson: 85 killed

Date & Time: May 3, 1968 at 1548 LT
Type of aircraft:
Operator:
Registration:
N9707C
Flight Phase:
Survivors:
No
Schedule:
Houston - Dallas - Memphis
MSN:
1099
YOM:
1959
Flight number:
BN352
Location:
Crew on board:
5
Crew fatalities:
Pax on board:
80
Pax fatalities:
Other fatalities:
Total fatalities:
85
Captain / Total flying hours:
10890
Captain / Total hours on type:
1380.00
Copilot / Total flying hours:
2568
Copilot / Total hours on type:
1820
Aircraft flight hours:
20958
Circumstances:
Braniff Flight 352 departed Houston (HOU) at 16:11 for a flight to Dallas (DAL) and climbed to FL200. Some 25 minutes into the flight, the L-188A Electra was approaching an area of severe thunderstorm activity. The crew requested a descent to FL150 and a deviation to the west. ARTCC then advised the crew that other aircraft were deviating to the east. The Electra crew still thought it looked all right on the west and were cleared to descend to FL140 and deviate to the west. At 16:44 the flight was further cleared to descend to 5000 feet. At 16:47 the aircraft had apparently encountered an area of bad weather, including hail, and requested (and were cleared for) a 180° turn. Subsequent to the initiation of a right turn, the aircraft was upset. During the upset, N9707C rolled to the right to a bank angle in excess of 90° and pitched nose-down to approximately 40 degrees. A roll recovery maneuver was initiated and the aircraft experienced forces of 4,35 g. Part of the right wing failed and the aircraft broke up at an altitude of 6750 feet and crashed in flames a little later. There was no survivor among the 85 occupants.
Probable cause:
The stressing of the aircraft structure beyond its ultimate strength during an attempted recovery from an unusual attitude induced by turbulence associated with a thunderstorm. The operation in the turbulence resulted from a decision to penetrate an area of known severe weather.
Final Report:

Crash of a BAc 111-203AE in Falls City: 42 killed

Date & Time: Aug 6, 1966 at 2312 LT
Type of aircraft:
Operator:
Registration:
N1553
Flight Phase:
Survivors:
No
Schedule:
New Orleans – Shreveport – Fort Smith – Tulsa – Kansas City – Omaha – Minneapolis
MSN:
70
YOM:
1965
Flight number:
BN250
Crew on board:
5
Crew fatalities:
Pax on board:
37
Pax fatalities:
Other fatalities:
Total fatalities:
42
Captain / Total flying hours:
20767
Captain / Total hours on type:
549.00
Copilot / Total flying hours:
9296
Copilot / Total hours on type:
685
Aircraft flight hours:
2307
Aircraft flight cycles:
2922
Circumstances:
Flight 250 was a scheduled domestic passenger/cargo flight from New Orleans, Louisiana, to Minneapolis, Minnesota, with intermediate stops at Shreveport, Louisiana, Fort Smith, Arkansas, Tulsa, Oklahoma, Kansas City, Missouri, and Omaha, Nebraska. The flight departed from New Orleans at 1835 hours CST and arrived at Kansas City without reported incident. It departed from Kansas City at 2255 hours on an IFR clearance to Omaha via Jet Route 41 at FL 200. Just prior to take-off, the flight was restricted to 5 000 ft due to conflicting traffic. When the flight was about 12 miles north of Kansas City, control of the aircraft was transferred to the Kansas City Air Route Traffic Control Centre (ARTCC). Radar contact was confirmed and the flight was cleared to climb to and maintain FL 200. After some discussion with ARTCC about the weather the flight crew advised that they would like to maintain 5 000 ft to Omaha. They reported they were at 6 000 ft and ARTCC cleared the flight to maintain that altitude until 5 000 ft was available. At 2303 hours the Kansas City ARTCC initiated a transfer of control of the flight to the Chicago ARTCC but before the transfer could be accomplished the flight requested and received permission from the Kansas City controller to deviate to the left of course. At 2306 hours the Kansas City controller cleared the flight to descend to and maintain 5 000 ft and contact the Chicago ARTCC. After some discussion of the weather as it was displayed on the Chicago controller's radar, the flight was advised that another Braniff flight, Flight 255, was on the same frequency and was at 10 000 ft climbing to 17 000 ft after departing Omaha. The crews of the two aircraft exchanged weather information and the crew of Flight 255 advised that they had encountered light to moderate turbulence from about 15 miles southeast of the Omaha airport and that it appeared they would be out of it in another 10 miles based on their radar observations. Flight 250 terminated this conversation at approximately 2308:30 hours. This was the last transmission received from the flight. Ground witnesses stated that they observed the aircraft approach and either fly into or over a shelf of clouds preceding a line of thunderstorms that was approaching frbm the north and northwest, and that shortly thereafter they saw an explosion in the sky followed by a fireball falling out of the clouds. The aircraft crashed at approximately 2312 hours, 7.6 statute miles on a true bearing of 024.50 from Falls City, Nebraska, at an elevation of 1 078 ft AMSL. All 42 occupants have been killed.
Probable cause:
The Board determined that the probable cause of this accident was in-flight structural failure caused by extreme turbulence during operation of the aircraft in an area of avoidable hazardous weather. The following findings were reported:
The aircraft was confronted with a severe squall line which was oriented across its intended flight route. This system was adequately forecast and reported by the Weather Bureau; however, the company forecast was somewhat inaccurate with respect to the number and intensity of thunderstorms and the intensity of the associated turbulence in the system. The crew was aware of the forecast weather and was aware that the system could have been circumnavigated to the west. This was, in fact, suggested by the co-pilot.
Because the company forecast did not predict a solid line of thunderstorms, the company dispatcher did not take any action to delay or to reroute the flight. However, the dispatcher did not relay to the crew information which might have persuaded the pilot- in-command to avoid the storm system. In fact, when the dispatcher was informed of the efforts of other aircraft to avoid the squall line, he should have recommended avoidance action to Flight 250.
In spite of his apparent concern were the en-route weather and his knowledge that the squall line was quite solid, the pilot-in-command elected to penetrate the line using his airborne weather radar to select a "light" area.
Flight 250 never reached the main squall line. Instead, the aircraft broke up in a roll cloud approximately 5 miles from the nearest radar weather echo. At this ti= the aircraft was at the proper configuration and airspeed for flight in turbulence and the autopilot was engaged.
Flight 250 encountered extreme turbulence generated by the strong horizontal and vertical wind shears associated with the outflow of cold air from the approaching squall line. This turbulence probably caused a large angled gust of very short duration with components in the lateral, vertical, and longitudinal planes.
The forces and accelerations produced by this encounter caused the fin and right tailplane to reach their ultimate loads, with near-simultaneous failures resulting. The aircraft then pitched downward until the right wing reached its negative ultimate load. The loss of these components rendered the aircraft uncontrollable and shortly afterward it probably began a random tumbling motion which stabilized some time before impact into a flat-spinning attitude.
Final Report:

Crash of a Lockheed 10A Electra in San Jose

Date & Time: Dec 8, 1952
Type of aircraft:
Operator:
Registration:
N14938
Flight Phase:
Survivors:
Yes
MSN:
1027
YOM:
1935
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed in unknown circumstances.

Crash of a Douglas DC-2-112 in Oklahoma City: 8 killed

Date & Time: Mar 26, 1939 at 0248 LT
Type of aircraft:
Operator:
Registration:
NC13727
Flight Phase:
Survivors:
Yes
Schedule:
Chicago – Kansas City – Wichita – Oklahoma City – Dallas
MSN:
1253
YOM:
1934
Flight number:
BR001
Crew on board:
3
Crew fatalities:
Pax on board:
9
Pax fatalities:
Other fatalities:
Total fatalities:
8
Captain / Total flying hours:
9060
Captain / Total hours on type:
1253.00
Copilot / Total flying hours:
2244
Copilot / Total hours on type:
526
Circumstances:
Shortly after takeoff, while in initial climb, the left engine exploded. The crew attempted to return when, during the last turn at 115°, at a speed of 80 knots, the left wing stalled and hit the ground. The aircraft cartwheeled and crashed some 600 metres from the runway end, bursting into flames. The stewardess and seven passengers were killed.
Crew:
Claude H. Seaton, pilot,
Malcolm Wallace, copilot,
Louise Zarr, stewardess.
Probable cause:
A stall, induced by a violent yaw, resulting in loss of control from which the pilot was unable to recover.
Contributing factors are:
Failure of hold down studs on the number six cylinder of the left engine which resulted in the cylinder being forced off, carrying with it the lower third of the engine ring cowling. Displacement of the remaining portion of the left engine ring cowling, which caused buffeting, as a result of disturbances of the air flow over the tail surfaces, and increased the drag on that side of the aircraft. Severe vibration induced by the continued rotation of the propeller. Lack of individual propeller pitch controls which would have permitted the pilot to increase the pitch of the propeller on the inoperative engine, thereby reducing the speed of rotation and consequently the vibration from the effect of "windmilling".
Final Report:

Crash of a Lockheed 10A Electra in Dallas: 6 killed

Date & Time: Dec 23, 1936
Type of aircraft:
Operator:
Registration:
NC14905
Flight Type:
Survivors:
No
Schedule:
Dallas-Love Field - Dallas-Love Field
MSN:
1018
YOM:
1934
Crew on board:
2
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
6
Circumstances:
The crew (two pilots and four engineers of the company) were conducting a local post maintenance flight out from Dallas Love Field. On final approach, the captain elected to make a go around when an engine failed while trying to climb. The aircraft went into a spin and crashed on the north shore of the Bachman Lake, short of runway. All six occupants were killed and the aircraft was destroyed by impact forces and a post crash fire.
Probable cause:
Engine failure for unknown reasons at a critical phase of flight.

Crash of a Lockheed Vega 5C in Fort Worth: 1 killed

Date & Time: Nov 9, 1935 at 0445 LT
Type of aircraft:
Operator:
Registration:
NC980Y
Flight Type:
Survivors:
No
Schedule:
Dallas – Waco
MSN:
191
YOM:
1932
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
On November 9, 1935, at approximately 0445LT within the city limits of East Fort Worth, Texas, a commercially owned airplane, while being flown without passengers, crashed with resultant death of the pilot and the complete destruction of the aircraft. The airplane, a Lockheed Vega, model 5C, was owned and operated by Braniff Airway Inc., Oklahoma City, Oklahoma, and bore Department of Commerce licence n° NC980Y. At the time of the accident it was being ferried from Dallas to Waco, Texas, via Fort Worth, and no passengers were permitted to be carried. The pilot, William C. Maus of Waco, Texas, held a Department of Commerce transport pilot's licence and a scheduled air transport rating. The take-off was accomplished at 0410LT, the airplane carrying a 5-hour gasoline supply. The ceiling at Dallas was 1,000 feet with 8 miles visibility. Fort Worth at the time had a ceiling of 500 feet with 7 miles visibility. It had not been the intention of the pilot to land at Fort Worth but to fly beyond it to a lighted airway leading into Waco, Texas, his destination. By the time Fort Worth was reached the ceiling had dropped to about 75 feet and the visibility was zero. This change in weather was broadcast to the pilot from Fort Worth with instructions that he return to Dallas. Whether or not the pilot received this broadcast is not known inasmuch as his airplane was not equipped with two-way radio. However, he had plenty of fuel and could have easily returned to Dallas, where the weather had remained constant, or have flown on to Houston, where the ceiling was practically unlimited. Reports from various people who heard the airplane overhead and saw the accident indicate that the pilot was attempting to get under the 75-foot ceiling, presumably to locate the airport. He was heard flying around for some time and made two complete circles at a low altitude in the immediate vicinity of the accident. Immediately preceding the crash the airplane appeared diving out of the mist. The engine was heard to accelerate as through the pilot had just caught sight of the ground and was making an effort to pull the airplane out of the dive before striking. The aircraft was destroyed by impact forces and the pilot was killed.
Probable cause:
It is the opinion of the Accident Board that the probable cause of this accident was poor judgment on the part of the pilote for attempting to land at Fort Worth under existing weather conditions.

Crash of a Lockheed 5B Vega in Columbia: 1 killed

Date & Time: Dec 8, 1934 at 0520 LT
Type of aircraft:
Operator:
Registration:
NC106W
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Kansas City – Chicago
MSN:
123
YOM:
1930
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
The pilot was performing a night mail flight from Kansas City to Chicago. While approaching Columbia, he encountered icing conditions and decided to make an emergency landing. The airplane went out of control and crashed in a open field near a road. The pilot, sole on board, was killed.
Probable cause:
It is the opinion of the Accident Board that the probable cause of this accident was unexpected icing conditions which made proper handling of the aircraft impossible.

Crash of a Lockheed 5C Vega in Kewanee: 2 killed

Date & Time: Dec 5, 1931
Type of aircraft:
Operator:
Registration:
NC433E
Survivors:
Yes
Schedule:
Kansas City – Chicago
MSN:
49
YOM:
1929
Crew on board:
2
Crew fatalities:
Pax on board:
4
Pax fatalities:
Other fatalities:
Total fatalities:
2
Circumstances:
En route from Kansas City to Chicago, the crew encountered poor weather conditions with snow falls. The crew decided to divert to Kewanee for an emergency landing. On approach, the airplane impacted the roof of a barn and crashed. Two passengers were killed and four other occupants were injured.

Crash of a Lockheed DL-1B Vega in Chicago: 2 killed

Date & Time: Jul 12, 1931
Type of aircraft:
Operator:
Registration:
NC8497
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Chicago – Detroit
MSN:
154
YOM:
1930
Crew on board:
2
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
2
Circumstances:
After takeoff from Chicago Airport, while climbing to a height of 700 feet, the engine failed. The crew elected to return and initiated a turn to the right when the airplane stalled and crashed, bursting into flames. The aircraft was destroyed and both crew members were killed.
Probable cause:
Engine failure during initial climb.