Crash of a Douglas DC-6 off Mobile: 46 killed

Date & Time: Feb 14, 1953 at 1710 LT
Type of aircraft:
Operator:
Registration:
N90893
Flight Phase:
Survivors:
No
Schedule:
Miami – Tampa – New Orleans
MSN:
43057
YOM:
1947
Flight number:
NA470
Location:
Crew on board:
5
Crew fatalities:
Pax on board:
41
Pax fatalities:
Other fatalities:
Total fatalities:
46
Captain / Total flying hours:
17000
Captain / Total hours on type:
4110.00
Copilot / Total flying hours:
4485
Copilot / Total hours on type:
184
Aircraft flight hours:
15994
Circumstances:
Flight 470 departed Tampa at 1543LT. Its flight plan, filed previously at Miami, specified a cruising altitude of 14,500 feet according to Instrument Flight Rules and an estimated elapsed tune of two hours for the direct 498 statute miles to New Orleans. Included among the weather data attached to the captain's copy of the flight plan was a forecast of thunder-storms attended by moderate to severe turbulence in the vicinity of New Orleans, the destination. The CAA Air Route Traffic Control cleared the flight at the 14,500-foot level direct to New Orleans. Flight 470 passed over NA-3 at its cruising altitude of 14,500 feet at 1614, estimating over NA-2 at 1642, and so reported to Radio-Tampa one minute later. At that time the flight also gave the local weather: broken clouds at 6,000 feet, broken clouds at 20,000 feet and temperature 4 degrees Centigrade. Meanwhile, Flight 917 landed at New Orleans at 1612. It reached the ramp at 1617 and at 1624, its captain sent the following message to Miami flight Control and to all company stations between New Orleans and Jacksonville, Florida, including Pensacola, Florida: "Flight 917 advises extreme turbulence all altitudes just east of New Orleans." At 1636, the captain sent the following message to the same stations: "Reference extreme conditions stop at present time severe turbulence No. 1. check (NA-1) to New Orleans weather looks better to west of New Orleans." At 1649, Flight 470 reported passing over NA-2 at 1645 at 14,500 feet, and estimated being over NA-l at 1710. It also reported, "Thunderstorms all quadrants . . ." Pensacola radio received and acknowledged this message, and advised the flight of "severe turbulence" between NA-l and New Orleans as reported by Flight 917. Flight 470 acknowledged, asked what altitude Flight 917 reported turbulence, and was informed "severe turbulence at all altitudes." Again Flight 470 acknowledged. At 1654, the flight advised Pensacola that it was reducing power because of turbulence and five minutes later requested Air Route Traffic Control clearance to descend from 14,500 feet to 4,500 feet. This was granted within a minute or so, with the provision that descent between 10,000 feet and 8,000 feet be visual. At 1703, the Flight advised Pensacola of passing through 10,000 feet, and at 1712 (recorded), advised that it had reached 4,500 feet at 1710. Pensacola repeated this message back to the flight and gave it the 1648 New Orleans special weather. This was: measured 800, overcast, visibility 10 miles, wind north-northeast 25 m.p.h., with gusts to 34, the altimeter 29.61; barometer unsteady. The flight acknowledged and there were no further radio contacts. An attempt by New Orleans at 1718 to contact Flight 470 was unsuccessful, as were subsequent attempts by several other stations, and at 1840 the Coast Guard's air-sea rescue service was alerted. Low clouds and heavy seas hampered the search both by air and sea. However, on the following day (February 15) floating debris and 17 bodies were recovered from a fairly localized area in the Gulf of Mexico at about 30 degrees 38' North Latitude and 87 degrees 46' West Longitude. This position is approximately 38 miles to the right of the aircraft's direct course and is about 20 miles southeast of Mobile Point at the easterly mouth of Mobile Bay. Two wrist watches on bodies were impact stopped at 1710LT.
Probable cause:
The Board determines that the probable cause of this accident was the loss of control followed by the in-flight failure and separation of portions of the airframe structure while the aircraft was traversing an intense frontal-wave type storm of extremely severe turbulence, the severity and location of which the pilot had not been fully informed. The following findings were pointed out:
- After passing the NA-2 check point, the flight reported thunderstorms in all quadrants,
- The flight requested and was granted clearance to descend to 4,500 feet due to turbulence,
- Its last message reported reaching 4,500 feet at 1710LT,
- The aircraft penetrated a storm system of unusual severity,
- Tornadic conditions including high winds, violent gusts, and possible waterspouts were occurring in the storm system,
- The storm's movement had not been adequately anticipated in current weather forecasts,
- Although a special Severe Weather Bulletin issued at Washington, D.C., was received by National Airlines and the Weather Bureau at Miami and New Orleans, no U. S. Weather Bureau advisory weather reports were issued to ARTC to report the unexpected development and movement of the storm to en route flights; nor did National Airlines attempt to relay this information to Flight 470,
- Flight 470 entered the storm system without full knowledge of its severity,
- The aircraft's structure failed at a moment when, in all probability, gusts loads combined with violent maneuvering loads were being imposed to maintain or regain control,
- The main wreckage was located in the Gulf of Mexico 3.8 miles offshore and about 52 miles to the right of course; the left wing was found 2,100 feet from the main wreckage,
- Examination of the recovered parts revealed no indication of malfunctioning control, fatigue failure, fire, explosion, or lightning strike while in flight.
Final Report:

Crash of a Consolidated PBY-5A Catalina off George Town

Date & Time: Jan 2, 1952
Type of aircraft:
Operator:
Registration:
VP-JAW
Flight Phase:
Survivors:
Yes
Schedule:
George Town – Tampa
MSN:
187
YOM:
1941
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Shortly after takeoff from George Town Airfield, while climbing, the seaplane went out of control and crashed into the sea few dozen yards off shore. All occupants were rescued while the aircraft, partially submerged, was considered as damaged beyond repair.

Crash of a Curtiss C-46 in Newark: 56 killed

Date & Time: Dec 16, 1951 at 1509 LT
Type of aircraft:
Operator:
Registration:
N1678M
Flight Phase:
Survivors:
No
Schedule:
Newark – Tampa
MSN:
22572
YOM:
1945
Crew on board:
4
Crew fatalities:
Pax on board:
52
Pax fatalities:
Other fatalities:
Total fatalities:
56
Captain / Total flying hours:
8679
Captain / Total hours on type:
2600.00
Copilot / Total flying hours:
1224
Copilot / Total hours on type:
234
Aircraft flight hours:
4138
Circumstances:
The aircraft arrived at Newark following a non-stop flight from Fort Smith, Arkansas, on December 15 at about 2330. During this flight of about five and one quarter hours, there was no reported malfunctioning of the aircraft or its powerplants with the exception of both cabin heaters which were inoperative. This was reported to the Babb Company, a CAA approved repair station at the Newark Airport, and instructions were issued to repair the heaters. Mechanics worked during the night and the following morning with the result that one of the cabin heaters was believed to be repaired. This, however, could not be positively determined without test flying the aircraft; this was not done. During the morning of December 16 the aircraft was serviced. The left engine required five gallons of oil and the right engine required 10 gallons to bring the respective tanks to a total of 34 gallons each. Fuel was added in the amount of 767 gallons, which filled the front and center tanks in each wing. The aircraft was loaded with 52 passengers including two infants in arms. The crew consisted of Captain Albert C. Lyons. Copilot John R. Mason, and Stewardess Doris Helm. A fourth company employee who was deadheading to Miami occupied the jump seat. The aircraft's center of gravity was located Within prescribed limits. Actual takeoff weight of the aircraft was about 117 pounds over the prescribed maximum of 48.000 pounds. A flight plan was made out and signed by both the captain and copilot. It specified VFR (Visual Flight Rules) direct flight at a cruising altitude of 4,000 feet to Tampa, Florida. After the aircraft was loaded both engines were run up. The right me was run up longer than the left engine, and a number of nearby persons saw smoke continuously coming from that engine. This spoke was variously described as being "white," "grey" and "light" in color. The Newark Control Tower then gave the aircraft taxying instructions and advised the captain that he had a choice of Runway Nos. 24 or 28 for takeoff. The captain chose No. 28. The flight was then cleared for takeoff at 1502 and immediately started down the runway. The tower recorded that the aircraft left the ground at approximately 1503. Immediately after becoming airborne, the landing gear was seen to retract. At this point tower personnel for the first time observed a trail of White smoke from the right side of the aircraft and the tower supervisor, fearing a fire, pressed the airport crash alarm button. The tower then advised the flight as follows: "1678M, you can land any my possible, any way you wish, cleared back to the field." This was not acknowledged. 'The takeoff run was normal but the subsequent climb was slow. The right engine emitted a continuous smoke trail as previously described. A captain employed by Miami Airline witnessed the takeoff. Believing that the source of the smoke was an overheated right brake, he immediately telephoned the control tower and asked that the flight he advised of his impression, suggesting that the landing gear not be raised and that it he extended if it had been raised. The tower complied, the flight acknowledged, and the landing gear was seen to extend. The tower then sent the following message: "1678M the wind is west at 20, Runway 6, the airport is yours, you're cleared to land, Runway 6." There was no acknowledgement. The aircraft continued straight ahead in the direction of takeoff for a distance of approximately four miles, slowly gaining an altitude of approximately 800 to 1,000 feet. The smoke continued to increase in volume and shortly before the four-mile point was reached black smoke and actual flame were seen coming from the underside of the right nacelle as the landing gear was lowered. Shortly after the landing gear was extended, a large, "ball of fire" was seen coming from underneath the right nacelle. 3 The aircraft then started a gradual left turn banked at an estimated 10 degrees. This turn and subsequent flight continued for an additional distance of approximately 4 1/2 miles with altitude continuously being lost, until the aircraft was approximately 3 miles Southwest of Runway 28 of the Newark airport. During this period of the flame from the right nacelle appeared to go out for a period of a few seconds, and then start again. It was indicated that the speed of the aircraft throughout the entire flight had been somewhat slow and that during the latter portion of the flight the speed became progressively slower, and the right propeller was turning slowly. The aircraft at this time was over the City of Elizabeth, New Jersey, and was nearly 60 degree from alignment with and approximately two and one-fourth miles distant from Runway 6 of the Newark Airport. At this point and at an estimated altitude of about 200 feet the aircraft's then low left wing dropped about vertically downward with the right wing coming vertically upward and the aircraft fell with relatively little forward speed. Just before striking the ground the aircraft's left wing tip struck the gabled roof of a vacant house near its ridge. The aircraft continued ahead and down, struck a brick building used by the City of Elizabeth as a storage for water supply department materials, damaged this building and plunged a few feet ahead to the bank of the Elizabeth River, where it came to rest. The wreckage was in a generally inverted position and partially submerged in shallow water. A severe gasoline fire developed instantly, spreading to and damaging the storage building. Nearby fire fighting apparatus arrived quickly and about 17 minutes later, the fire was extinguished. All aboard were killed and one person on the ground was seriously injured.
Probable cause:
The Board determines that the probable cause of this accident was a stall with the landing gear extended following a serious loss of power from the right engine. This loss of power was caused by the failure of the hold-down studs of the No. 10 cylinder, precipitating a fire in flight which became uncontrollable. The following findings were pointed out:
- The aircraft was loaded above its maximum allowable takeoff weight,
- An abnormal amount of smoke trailed from the right engine during runup, takeoff and climb,
- The hold-down studs of No. 10 cylinder were sound metallurgically,
- The failure from fatigue of No. 10 cylinder's hold-down studs, due to improper installation of their nuts, caused the cylinder to separate completely from the crankcase during or shortly after takeoff,
- A fire started at the base of No. 10 cylinder, rapidly becoming uncontrollable,
- The flight was cleared by the tower to return and land at Newark Airport using any runway,
- The wheels were lowered upon advice from the ground, relayed by the tower, by a company employee, acting in his best considered judgment,
- The right propeller was partially feathered in flight,
- The right wing did not fail in flight,
- While attempting to return to the Newark Airport, the aircraft stalled at an altitude of approximately 200 feet, fell sharply to its left, struck buildings, and crashed on the bank of the Elizabeth River,
- The carrier's pilot training program on emergency procedures was informal, irregular, and therefore inadequate.
Final Report:

Crash of a Lockheed 18 LodeStar in Lakeland: 2 killed

Date & Time: Oct 5, 1945 at 0105 LT
Type of aircraft:
Operator:
Registration:
NC18199
Survivors:
Yes
Schedule:
Miami – Fort Myers – Sarasota – Saint Petersburg – Tampa – Lakeland
MSN:
2265
YOM:
1942
Flight number:
NA016
Crew on board:
3
Crew fatalities:
Pax on board:
12
Pax fatalities:
Other fatalities:
Total fatalities:
2
Captain / Total flying hours:
4800
Captain / Total hours on type:
851.00
Copilot / Total flying hours:
5247
Copilot / Total hours on type:
409
Aircraft flight hours:
1798
Circumstances:
Flight 16 departed Miami at 2112 October 4, 1945, one hour and 15 minutes late due to rerouting of the aircraft from a previous schedule. The flight from Miami progressed uneventfully with routine stops being made at Fort Myers, Sarasota, St. Petersburg and Tampa. The aircraft was refueled at Tampa and under contact flight rules was cleared to Lakeland 33 Miles away. Departure was made at 0045 with a crew of three and twelve passengers. The flight climbed to an altitude of 1500 feet and continued towards Lakeland. At the time of departure the weather at Tampa was unlimited while Lakeland was reporting 9 miles visibility and scattered clouds at 500 feet. At 0058, when seven miles from the field, the first officer called Lakeland and made an “in-range” report to which the Lakeland tower replied, “In range, wind NE 7-8 mph, NE runway”. Although the pilots observed scattered stratus clouds over the lighted city of Lakeland, the airport was clearly visible. A descent was established for a straight-in approach to the NE runway and when at an altitude of about 900 feet and approximately three or four miles from the field the captain extended the gear, put the mixture in automatic rich and reduced the manifold pressure to 20 inches. At an altitude of 700 feet the propellers were placed in low pitch and the landing lights were turned on. When about 2 miles from the field at 600 feet the flaps wore extended fully. Shortly thereafter, according to the testimony of the pilot, the aircraft entered a cloud, however, ground witnesses at no time lost sight of the flight during its approach indicating that the cloudiness was not extensive. This cloud was above dark terrain and had not been seen by the pilots as were others above the lighted city. Because of the unexpected presence of a cloud during the approach, the captain remarked to the first officer that he was going around again and retracted the wheels. Some power was applied and, according to statements of the captain, the flaps were started up at that time. A number of witnesses on and near the airport observed the aircraft continue down the runway at a uniform altitude of 30 or 40 feet. As it passed beyond the runway, the captain stated that the throttles were opened to 45 inches of manifold pressure but that the plane settled rapidly into the lake. The plane struck the surface of the water approximately 1000 feet beyond the runway shedding some fuselage covering and apparently skipped an additional 1000 feet where it sank in 10 feet of water. The occupants of the aircraft, with the exception of two passengers, escaped from the wreckage and were rescued by local residents approximately thirty minutes later.
Probable cause:
On the basis of the foregoing the Board determines that the probable cause of this accident was faulty execution of a missed approach procedure resulting in settling of the aircraft into a water area beyond the landing runway.
Final Report:

Crash of a Martin B-26A-1 Marauder off Tampa

Date & Time: Oct 20, 1942
Type of aircraft:
Operator:
Registration:
41-7473
Flight Phase:
Flight Type:
MSN:
7473
YOM:
1941
Location:
Crew on board:
0
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
0
Circumstances:
Crashed in unknown circumstances into the Tampa Bay, two miles north of the Gandy bridge. Crew fate unknown.

Crash of a Pitcairn PA-5 Mailwing in Tampa: 1 killed

Date & Time: Jul 30, 1929
Type of aircraft:
Operator:
Registration:
NC6617
Flight Phase:
Flight Type:
Survivors:
No
Schedule:
Tampa - Tampa
MSN:
28
YOM:
1928
Location:
Crew on board:
1
Crew fatalities:
Pax on board:
0
Pax fatalities:
Other fatalities:
Total fatalities:
1
Circumstances:
The pilot was taking part to an airshow in Tampa. While performing aerobatic manoeuvres, he lost control of the aircraft that crashed, bursting into flames. The pilot, sole on board, was killed.