Crash of a Douglas EC-47D in Philadelphia-Northeast: 3 killed

Date & Time: Oct 7, 1952 at 0205 LT
Operator:
Registration:
43-48870
Flight Type:
Survivors:
Yes
Schedule:
Niagara Falls - Mitchel
MSN:
14686/26131
YOM:
1944
Crew on board:
3
Crew fatalities:
Pax on board:
3
Pax fatalities:
Other fatalities:
Total fatalities:
3
Circumstances:
En route to Mitchel AFB in Long Island, the crew was forced to divert to LaGuardia Airport due to poor weather conditions. A landing in LaGuardia was also impossible due to foggy conditions so the captain decided to divert to the Philadelphia-Northeast Airfield. During a night approach, the airplane crashed in a swampy area located one mile short of runway. While all three passengers were rescued, all three crew members were killed.

Crash of a De Havilland DH.104 Dove 2A in York

Date & Time: Oct 2, 1952
Type of aircraft:
Operator:
Registration:
N1515V
Flight Phase:
Survivors:
Yes
Schedule:
York - Nantucket
MSN:
04336
YOM:
1952
Crew on board:
1
Crew fatalities:
Pax on board:
5
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Shortly after takeoff from York Airport, one of the engine failed. The pilot attempted an emergency landing when the aircraft crash landed in a field and came to rest, bursting into flames. All six occupants were injured.

Crash of a Douglas DC-4-1009 in Philadelphia: 7 killed

Date & Time: Jan 14, 1951 at 1413 LT
Type of aircraft:
Operator:
Registration:
N74685
Survivors:
Yes
Schedule:
Newark – Philadelphia – Norfolk
MSN:
43102
YOM:
22
Flight number:
NA083
Crew on board:
3
Crew fatalities:
Pax on board:
25
Pax fatalities:
Other fatalities:
Total fatalities:
7
Captain / Total flying hours:
6723
Captain / Total hours on type:
191.00
Copilot / Total flying hours:
4214
Copilot / Total hours on type:
158
Circumstances:
National Airlines’ Flight 83 departed Newark, New Jersey, at 1333, January 14, 1951, for Norfolk, Virginia, with a scheduled stop at Philadelphia. The crew consisted of Captain Howell C. Barwick, Copilot Edward J Zatarain, and Stewardess Mary Frances Housley. The aircraft’s total weight at takeoff was 58,601 pounds, which was within the allowable gross takeoff weight of 64,211 pounds, the load was properly distributed. Flight 83 was scheduled to leave Newark at 1300, but was delayed 33 minutes due to the replacement of a malfunctioning generator. The company flight clearance was filed at 1215 for the scheduled departure at 1300, and this clearance was also used for the delayed departure. Attached to it was the weather information for the flight, and a notice that the ILS (instrument landing system) glide path at Philadelphia was inoperative until further notice Immediately before taking off, the pilot requested and received from the tower the latest Philadelphia weather (reported on the 1328 CAA teletype sequence report and received at Newark after he boarded the aircraft), which was ceiling measured 1,000 feet, overcast, wind south-southwest at four miles per hour, and visibility 1 1/2 miles, with light snow and smoke Flight 83 was cleared by the New York Air Route Traffic Control to proceed to North Philadelphia range station via Amber Airway No 7, to maintain 4,000 feet, with Newark designated as the alternate airport. Thirteen minutes after takeoff, at 1346, Air Route Traffic Control issued the flight a new clearance to proceed to the Philadelphia ILS outer marker, to maintain 4,000 feet, and to contact Philadelphia Approach Control when passing the Northeast Philadelphia range station. At 1354 the flight reported over Northeast Philadelphia at 4,000 feet and was cleared by Approach Control to descend, crossing the Philadelphia range station at 3,000 feet, and to advise the tower when leaving the 4,000 and 3,000-foot levels. It was also advised that the altitude was unrestricted after passing the range station, and that it was cleared to make a straight-in approach to Runway 9 With the above clearance, local weather was given precipitation ceiling 500 feet, sky obscured, visibility 1, 1/4 miles, snow and smoke, and wind south-southwest two miles per hour. Following this clearance, the flight descended and reported over the Philadelphia range station at 3,000 feet, was again cleared for an approach to Runway 9, and was advised to report leaving thousand-foot levels. The flight acknowledged and reported leaving 3,000 feet at 1404, but no report of leaving 2,000 feet was received by Approach Control. According to the captain, they then proceeded to the outer marker and executed a procedure turn. At 1408 the flight reported over the outer marker, inbound, and stated that it was at 1,600 feet and descending. A clearance was immediately reissued to land on Runway 9, and the wind was given as south-southwest, three miles per hour. The flight was advised that the glide path was inoperative, that the frequency of the ILS localizer was 110 3 mc, that a 2,000-foot extension to the west end of the runway was under construction, and that braking action on Runway 9 was poor-to-fair. According to tower personnel this transmission was acknowledged. The crew, however, stated that they did not receive it. The flight continued its approach past the middle marker to the airport, and was first observed by ground witnesses beneath the overcast and directly over the intersection of Runways 4/22 and 9/27, located approximately 1,200 feet east of the threshold of Runway 9. Although the aircraft was first seen beneath the overcast and within the boundaries of the airport, the crew stated that they became contact at an altitude of approximately 500 feet, between the outer and middle markers. The aircraft was next seen to descend steeply, flare out for a landing in a normal manner, and float a considerable distance. After making contact with the runway the aircraft continued straight ahead, passed beyond the end of the runway, and crashed into a ditch at the east boundary of the airport. Fire immediately followed. Seven of the twenty-eight occupants did not evacuate the aircraft, and were fatally burned. The airport fire-fighting equipment was dispatched immediately to the scene, but efforts to extinguish the fire and rescue the remaining occupants were futile.
Probable cause:
The Board determines that the probable cause of this accident was the captain’s error in judgment in landing the aircraft too far down the slippery runway instead of executing a missed approach procedure. The following contributory factors were found:
- The runway was covered with wet snow and braking conditions were poor-to-fair,
- The landing was made too far down the slippery runway to permit stopping within its limits.
Final Report:

Crash of a Beechcraft AT-7 Navigator in Pittsburgh

Date & Time: Aug 13, 1950
Type of aircraft:
Operator:
Registration:
43-33313
Flight Type:
MSN:
5476
YOM:
1942
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crash landed for unknown reason.

Crash of a Curtiss C-46A-40-CU Commando in Harrisburg

Date & Time: Mar 1, 1950
Type of aircraft:
Operator:
Registration:
42-107320
Flight Type:
Survivors:
Yes
MSN:
27007
YOM:
1944
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
After touchdown in Harrisburg-Olmsted AFB, the aircraft went out of control, veered off runway and came to rest in flames. There were no casualties but the aircraft was destroyed by fire.

Crash of a Lockheed PV-2 Harpoon in Hershey: 3 killed

Date & Time: Jul 24, 1949
Type of aircraft:
Operator:
Registration:
37208
Flight Phase:
Flight Type:
Survivors:
Yes
MSN:
15-1174
YOM:
1944
Crew on board:
7
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
3
Circumstances:
An engine caught fire in flight, forcing the crew to attempt an emergency landing. The aircraft registered 37208 (VP-ML-6) crashed in flames in a field located in Hershey. Four crew members were injured while three others were killed.
Probable cause:
Engine fire.

Crash of a Douglas DC-6 in Mount Carmel: 43 killed

Date & Time: Jun 17, 1948 at 1241 LT
Type of aircraft:
Operator:
Registration:
NC37506
Flight Phase:
Survivors:
No
Schedule:
San Diego – Los Angeles – Chicago – New York
MSN:
42871
YOM:
1947
Flight number:
UA624
Crew on board:
4
Crew fatalities:
Pax on board:
39
Pax fatalities:
Other fatalities:
Total fatalities:
43
Captain / Total flying hours:
7310
Captain / Total hours on type:
30.00
Copilot / Total flying hours:
3289
Copilot / Total hours on type:
129
Aircraft flight hours:
1245
Circumstances:
The airplane arrived in Chicago at 0952LT, en route from Los Angeles to New York City. At Chicago, the airplane was given a routine station inspection, serviced, loaded, and the flight departed for New York with a new crew at 1044. Aboard were 39 passengers, a crew of four, 2,568 pounds of cargo and 1,800 gallons of fuel, all properly loaded. The resulting total airplane weight was within the certificated gross weight. The airplane climbed en route to its planned altitude of 17,000 feet, proceeding on course, and at 1155 the captain reported to the company radio at LaGuardia Field, that the airplane was mechanically "okay” for a return trip. A routine report was made over Phillipsburg, PA, approximately 500 miles east of Chicago, at 1223, and at 1227 the crew made a routine acknowledgment of a clearance to descend en route to an altitude between 13,000 and 11,000 feet. Four minutes later, at 1231, the company radio operator at LaGuardia Field heard a voice which did not identify itself calling loudly and urgently. Another United crew in a DC-3, flying over the same route behind Flight 624 and at a different altitude, heard what they termed “screaming voices” calling "New York." Then, after an unintelligible transmission, “This is an emergency descent." Inasmuch as all other air carrier flights in the vicinity at this time were accounted for, this transmission undoubtedly emanated from Flight 624. The airplane was first observed by ground witnesses 31 miles northwest of the scene of the accident flying a southeasterly heading toward Shamokin, PA. The airplane flew over the Sunbury Airport, at approximately 4,000 feet above the ground on a southeasterly heading. Immediately north of Shamokin the airplane, then only 500 to 1,000 feet above the ground, described a shallow left turn. The course was toward constantly rising terrain, the hills around Sunbury being 900 feet in elevation and the hills around Shamokin being approximately 1,600 feet in elevation. Five miles east or beyond Shamokin the airplane, flying only 200 feet above the ground, entered a right climbing turn. As it passed to the north of Mount Carmel, the climbing turning attitude increased sharply. The airplane then struck a hillside at an elevation of 1,649 feet. The aircraft disintegrated on impact and all 43 occupants were killed.
Probable cause:
The Board determines that the probable cause of this accident was the incapacitation of the crew by a concentration of CO2 gas in the cockpit.
The following factors were considered as contributing:
- A fire warning caused the crew to discharge at least one bank of the CO2 fire extinguisher bottles in the forward cargo pit (the forward underfloor baggage compartment),
- Six 15-pound CO2 bottles and six discharge valves were found in the wreckage, however, both the bottles and the valves (which had become separated from their respective bottles upon impact) were so damaged that no conclusions could be drawn as to how many of such bottles had been discharged prior to impact,
- At the time of impact, the emergency cabin pressure relief valves were closed, and the control mechanism for such valves was in the closed position,
- Except for the apparent failure of the fire detection instrument referred to in finding No. 5, supra, the investigation revealed no mechanical failure of the aircraft or fire in flight,
- The emergency procedure for the operation of the DC-6 fire extinguisher system was established after flight tests were conducted in a descent configuration of 300 miles per hour, with landing gear and flaps up, no flight tests were conducted prior to the accident in a descent configuration of 160 miles per hour with gear and flaps down, which configuration was also approved for DC-6 operations,
- At the time of impact the landing gear was in the “up" position, thus indicating that the aircraft had descended in the configuration of 300 miles per hour. The extensive breakage of the aircraft precluded any positive determination as to the position of the flaps,
- After the release of CO2 gas hazardous concentrations of the gas entered into the cockpit,
- Due to the physiological and toxic effects of high concentrations of CO2 gas in the cockpit, which would probably not have occurred had the cabin pressure relief valves been open, the members of the flight crew of the aircraft were rendered physically and mentally incapable of performing their duties.
The following comment was added to the conclusion:
A fire in flight permits little opportunity for the exercise of detached and thoughtful consideration of emergency procedure. Immediate action is required if a fire is to be controlled. Too little consideration has been given to the psychological and physical limitations of crew members in time of stress and danger as related to the complexity of emergency fire procedure. It is not safe to assume that the pilot and co-pilot, under emergency pressure, will always adhere rigidly to the sequence of steps outlined in the CAA Approved Airplane Operating Manual. The possibility of human error under great mental stress is well documented in air transport experience and the design of aircraft controls, especially those of an emergency character, should take into consideration the natural limitations of human nature. These limitations argue against involved procedures applicable in emergencies. In harmony with this objective, the Douglas Aircraft Company has designed and is testing a modified fire extinguishing system which will permit all necessary steps to be executed by the movement of one control. An additional vent is also being designed to reduce CO2 concentration in the cockpit. Seven days after the Mt Carmel accident, the Director of Aviation Safety of the CAA directed telegrams to all CAA regional administrators calling attention to his telegram of June 10, 1948, referred to above, and advising that further investigation had disclosed the existence of the CO2 concentration condition found in Constellation aircraft by the Chillicothe tests in other makes of aircraft. The telegram concluded "Hence, flight crews of all aircraft should be advised to wear oxygen masks and utilize emergency cockpit smoke clearance procedures when carbon dioxide is released into any fuselage compartment from other than portable extinguishers.” All scheduled U S air carriers operating DC-6s have equipped the airplanes with demand type full face oxygen masks for the use of the crew.
Final Report:

Crash of a Vultee V-1A near Somerset: 8 killed

Date & Time: Mar 20, 1948 at 0812 LT
Type of aircraft:
Operator:
Registration:
NC22077
Flight Phase:
Flight Type:
Survivors:
No
Site:
Schedule:
Providence – White Plains – Saint-Louis
MSN:
16
YOM:
1935
Crew on board:
1
Crew fatalities:
Pax on board:
7
Pax fatalities:
Other fatalities:
Total fatalities:
8
Captain / Total flying hours:
3200
Aircraft flight hours:
3500
Circumstances:
Aircraft NC 22077 departed from Providence, Rhode Island, for White Plains, New York, at about 0730 March 19, 1948. The aircraft carried the pilot, Herman F. Burlingame III, his wife Ruth L. Burlingame, their infant daughter Kathleen, and George H. Armitage, as well as four Chow dogs and personal baggage. Arriving at Westchester Airport, White Plains, one hour and 20 minutes later, aircraft NC22077 was serviced with 118 gallons of fuel. At 0935 the aircraft departed from White Plains, the pilot telling airport officials that he intended to fly either to Hadley Field, New Brunswick, New Jersey, or Solberg-Hunterdon Airport, White House, New Jersey. Two hours and 31 minutes later the aircraft returned to White Plains, Mr. Burlingame telling airport officials that he had not landed at either of the alternative destinations. The aircraft was parked for the night, after being serviced with 85 gallons of fuel. The following morning, March 20, 1948, at 0550 the flight departed from White Plains for St. Louis, Missouri. The aircraft carried an additional four persons who had joined the original group at White Plains. The take-off weight could not be precisely determined, but it was close to the maximum allowable. No flight plan was filed with CAA Airways Traffic Control, and though NC22077 was equipped with two-way radio, no transmissions were received from the flight after its departure from White Plains. Consequently the exact route over which the flight proceeded is not known. Shortly after 0800, witnesses in the vicinity of the west portal of the Laurel Hill Tunnel of the Pennsylvania Turnpike, approximately 45 miles southeast of Pittsburgh, Pennsylvania, observed an aircraft flying at a low altitude on a northwesterly heading. It was flying in and out of low-hanging cloud fringes, and therefore, was not continuously visible. However, the aircraft was observed to approach the tunnel, circle in front of the portal, and then disappear into the overcast. After losing sight of the aircraft, some of the witnesses stated that they heard a surge of engine power, followed by the sound of a crash. Others, more distant, noticed that sound from the aircraft ceased abruptly. Since no other aircraft was observed in the vicinity at that time, there is no doubt but what it was NC22077 that these witnesses saw.
Probable cause:
The Board determines that the probable cause of this accident was the failure from fatigue of the steel wrap-around plate of the steel attachment lower fitting at the rear spar of the right wing, causing the separation in flight of the right wing outer panel from the center panel.
The following factors were considered as contributory:
- The lower edge of the steel wraparound plate of the steel lug attachment fitting of the rear spar of the outer wing panel failed from fatigue,
- Evidences of fatigue in a wing attaching member would not be disclosed in the course of the usual inspection.
Final Report:

Ground accident of a Douglas DC-3A-197E in Philadelphia

Date & Time: Feb 24, 1947
Type of aircraft:
Operator:
Registration:
NC33646
Survivors:
Yes
MSN:
4125
YOM:
1941
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Ground accident. Exact circumstances unknown. No casualties but aircraft written off.