Capital Airlines Flight 75
| Accident summary | |
|---|---|
| Date | May 12, 1959 |
| Summary | Weather-induced loss of control In-flight structural failure |
| Site |
Chase, Maryland 39°20.5′N 76°23.0′W / 39.3417°N 76.3833°WCoordinates: 39°20.5′N 76°23.0′W / 39.3417°N 76.3833°W |
| Passengers | 27 |
| Crew | 4 |
| Fatalities | 31 (all) |
| Survivors | 0 |
| Aircraft type | Vickers 745D Viscount |
| Operator | Capital Airlines |
| Registration | N7463 |
Capital Airlines Flight 75 was a domestic scheduled Capital Airlines flight operating between La Guardia Airport and Atlanta Airport. A Vickers Viscount flying the route crashed in Chase, Maryland, on May 12, 1959, with the loss of all on board. The crash was the second of three involving a Capital Airlines Vickers Viscount in as many years; the other two were Capital Airlines Flight 20 and Capital Airlines Flight 67.
The flight left the terminal at La Guardia at 3:20 in the afternoon, 20 minutes after it was scheduled to begin, and took off at 3:29. It then climbed to 14,000 feet before coming onto the assigned airway, Victor 3. By 4:02 the crew contacted Washington Center, reporting over Westchester and estimating Westminster at fifteen minutes away. In the same message they noted that there were thunderstorms along the assigned course, and requested permission to stay in the clear a little south of Westminster. The air traffic controller acknowledged the message and gave the go-ahead. At 4:10 the flight called again, the pilots noting that they had slowed somewhat to account for turbulence. This was the last message sent by the flight crew; three minutes later, the plane entered an area of severe turbulence, lost control, and entered a steep descent.
It is believed that the craft reached an airspeed of 335 knots, fully 15 percent more than the Viscount's never-exceed speed, and about 5 percent in excess of the maximum speed demonstrated when the plane was certified. Consequently, at about 5000 feet both of the horizontal stabilizers failed at once, separating downard. The separation caused the plane to pitch violently downward; the gyroscopic loads combined with inertia to cause all four engine nacelles to break upward. Both wings were then subjected to extreme downloads. Under the pressure the right wing separated, and the integrity of the left was completely destroyed.
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