Crash of a Lockheed 18-56 LodeStar near Tyrone: 3 killed

Date & Time: Dec 20, 1956 at 1923 LT
Type of aircraft:
Operator:
Registration:
N1245V
Flight Phase:
Survivors:
No
Schedule:
Pittsburgh – New York
MSN:
2470
YOM:
1943
Crew on board:
2
Crew fatalities:
Pax on board:
1
Pax fatalities:
Other fatalities:
Total fatalities:
3
Captain / Total flying hours:
10615
Captain / Total hours on type:
498.00
Copilot / Total flying hours:
2315
Copilot / Total hours on type:
424
Aircraft flight hours:
3715
Circumstances:
N1245V departed Greater Pittsburgh Airport, Pittsburgh, Pennsylvania, at 1850, December 20, 1956, on an IFR flight plan via airways V-35, V-6, V-168, V-30, and V-1 to New York International Airport. Jamaica, New York. The crow consisted of Captain Roy E. Rollo and Copilot Lewis Thomas Williams. Mr. Alden Roach, President of Columbia-Geneva Steel Company, was the only passenger. At the time of takeoff from Pittsburgh, the gross weight of the aircraft was 19,421 pounds (maximum allowable gross load 19,500 pounds) and the weight was properly distributed. The purpose of the flight was to transport Mr. Roach to New York International Airport. The flight reported to Pittsburgh Air Route Traffic Center at 1905 when it was over New Alexandria, Pennsylvania, altitude 7,000 feet. A revised routing clearance to New York International Airport was issued to the flight at 1906 by ARTC to proceed via airways V-35, V-6, V-168, and Blue 18, and to climb to and maintain 9,000 feet. 2 Accordingly, N1245V reported leaving 7,000 and 8,000 feet at 1907 and 1909, respectively. At 1921 the Civil Aeronautics Administration Communications Station at Philipsburg, Pennsylvania, received a call from the flight giving its position as over the Coalport intersection at 1916, estimating Philipsburg at 1930. Philipsburg radio then requested N1245V to change over to the frequency of the New York Air Route Traffic Control Center and this message was acknowledged. This was the last radio contact with the flight. At 1928 Philipsburg radio received a telephone call, from a location 24 miles east of the Coalport intersection and approximately 12 miles south-southwest of the Philipsburg Airport, to the effect that an aircraft, later identified as N1245V, had crashed and was burning in a nearby mountainous wooded area. The Philipsburg 1928 weather sequence was: Ceiling measured 400 feet, overcast; visibility 2 miles; fog; temperature 40; dewpoint 40; wind calm; altimeter 30.04.
Probable cause:
The Board determines that the probable cause of the accident was the loss of control for reasons unknown resulting in a rapid descent during which structural failure occurred. The following findings were reported:
- Meteorological conditions at the aircraft's cruising altitude were conducive to the formation of carburetor or induction system icing,
- During an uncontrolled descent the aircraft failed structurally as a result of airloads in excess of design strength,
- There was no aircraft or engine fire prior to ground impact.
Final Report:

Crash of a Martin 404 in Pittsburgh: 22 killed

Date & Time: Apr 1, 1956 at 1920 LT
Type of aircraft:
Operator:
Registration:
N40403
Flight Phase:
Survivors:
Yes
Schedule:
Pittsburgh – Harrisburg – Reading – Allentown – Newark
MSN:
14103
YOM:
1951
Flight number:
TW400
Crew on board:
3
Crew fatalities:
Pax on board:
33
Pax fatalities:
Other fatalities:
Total fatalities:
22
Captain / Total flying hours:
12000
Captain / Total hours on type:
2200.00
Copilot / Total flying hours:
7145
Copilot / Total hours on type:
204
Aircraft flight hours:
9177
Circumstances:
Flight 400 was regularly scheduled between Pittsburgh, Pennsylvania, and Newark, New Jersey, with stops at Harrisburg. Reading. and Allentown, Pennsylvania. Captain Raymond F. McQuade, First Officer Harlan V. Jesperson, and Hostess Vary Jane Fanning, comprised the crew. Prior to departure the pilots were briefed on the en route weather and received the sequence and forecast reports. Although the en route weather was generally good the night was dispatched to Newark on an IFR flight plan via airways as is customary. Upon departure the gross weight of the aircraft was 41,822 pounds (the certificated allowable takeoff gross is 44,900 pounds and TWA's own limit is 43.,650 pounds) and the center of gravity of the loaded aircraft was located within the prescribed limits. Scheduled departure time was 1915; the flight asked for and received taxi clearance at 1916, was then given the wind as calm, and was cleared to runway 23. Takeoff clearance was requested and granted at 1919. About one minute later tower personnel observed a seemingly normal takeoff and initial climb immediately followed by a left turning descent, crash, and erupting fire just beyond the southwest boundary of the airport. Passengers extricated themselves from the jumbled wreckage through and ahead of the fire as best they could; some helped others while a few found themselves thrown out through tears and rents in the shattered fuselage. Although airport based fire fighting equipment was dispatched with no loss of tune some 20 minutes elapsed before it reached the site because of the necessity of traversing circuitous country lanes. Once there, the conflagration, which by that time had nearly consumed the wreckage, was quickly smothered. The stewardess and 21 passengers were killed while 14 other occupants were injured. The aircraft was totally destroyed.
Probable cause:
The Board determines that the probable cause of this accident was uncoordinated emergency action in the very short time available to the crew, which produced an airplane configuration with unsurmountable drag. The following findings were reported:
- At the time of the first power reduction the first officer saw the left engine zone 1 fire warning light come on and retarded the left throttle to a point where autofeathering was deactivated,
- The first officer then reached for the left manual feathering button but was dissuaded from using it by the captain, who, not knowing that the autofeathering was inoperative, attempted futilely to obtain it by pulling back the left mixture to idle cutoff,
- This action did not comply with the emergency procedures prescribed by the carrier for powerplant fire or failure,
- Although these were not the most desirable procedures, compliance without delay would have feathered the left propeller,
- The windmilling left propeller, the extended landing gear, and the takeoff flaps produced sufficient drag to make the airplane lose altitude and strike the ground,
- The cause of the fire warning was a failed exhaust connector clamp in the left engine which triggered an adjacent fire detecting unit,
- After the accident the carrier revised its emergency procedures for powerplant fire or failure.
Final Report:

Crash of a Fairchild C-119B-12-FA Flying Boxcar in Pittsburgh

Date & Time: Mar 8, 1955
Operator:
Registration:
49-0114
Flight Type:
Survivors:
Yes
MSN:
10351
YOM:
1949
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed on landing for unknown reason. There were no casualties.

Crash of a Northrop Alpha 4 in Pittsburgh

Date & Time: Jan 10, 1933 at 0405 LT
Type of aircraft:
Operator:
Registration:
NC992Y
Flight Phase:
Flight Type:
Survivors:
Yes
Schedule:
Pittsburgh – Columbus
MSN:
12
YOM:
1931
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Shortly after a night takeoff from Pittsburgh Airport, the airplane went out of control and crashed, bursting into flames. The pilot, sole on board, was seriously injured.