Delta Air Lines flight 9570
| Delta Air Lines flight 9570 | |
|---|---|
 The affected machine |
|
| Accident summary | |
| Accident type | Loss of control due to wake vortices |
| place |
Greater Southwest International Airport , Fort Worth , Texas , United States
|
| date | May 30, 1972 |
| Fatalities | 4th |
| Survivors | 0 |
| Injured | 0 |
| Aircraft | |
| Aircraft type |
Douglas DC-9-14
|
| operator |
Delta Air Lines
|
| Mark |
N3305L
|
| Departure airport |
Greater Southwest International Airport , Fort Worth , Texas , United States
|
| Destination airport |
Greater Southwest International Airport , Fort Worth , Texas , United States
|
| Passengers | 0 |
| crew | 4th |
| Lists of aviation accidents | |
The Delta Air Lines Flight 9570 was a training flight of Delta Air Lines , which on 30 May 1972, the Greater Southwest International Airport in Fort Worth , Texas with a Douglas DC-9-14 was conducted. During the flight, the aircraft lost control and crashed, killing all four occupants.
machine
The machine was a six and a half year old Douglas DC-9-14 final assembly at McDonnell Douglas' facility in Long Beach , California . The machine was rolled out on November 14, 1965, and the DC-9 was delivered to Delta Air Lines on November 26, 1965. The machine was certified with the aircraft registration N3305L and received the fleet number 205 . The aircraft had the factory number 45700, it was the 11th Douglas DC-9 from ongoing production. The twin- engined , narrow -body aircraft was equipped with two Pratt & Whitney JT8D-7 engines. By the time of the accident, the machine had had a total operating performance of 18,998 hours.
Inmates and flight plan
The flight plan provided for training flights to be carried out in the area of the Greater Southwest International Airport in Fort Worth , Texas . There were only four crew members on board the machine, three pilots from Delta Air Lines and a flight inspector from the Federal Aviation Administration .
the accident
In accordance with the flight plan, the crew carried out several approach and departure flights as training and test flights. When the machine approached runway 13 of the airport at 7:24 a.m., it began to oscillate around the longitudinal axis ( roll axis ) over the runway threshold. After a few pendulum movements, the machine suddenly rolled to the right at an extreme angle. The right wing touched the runway whereupon the machine fell to the ground, broke apart and went up in flames.
Victim
All four people on board the DC-9 were killed in the accident. Three of the victims died from the impact forces, the fourth from inhaling fire gases.
root cause
It turned out that the machine had crashed due to wake vortices generated by a Douglas DC-10 , which at the time was conducting American Airlines Flight 1114, also a training flight. A touch-and-go maneuver had just been carried out with the DC-10 immediately before the approach of the DC-9 . The pilots of the DC-9 lost control of their aircraft when it was caught in the wake vortex. The crew had been warned of the wake vortices by air traffic control, but the visual approach procedures at the time did not offer adequate protection. The investigating authority made a total of eight suggestions for improvement in its final report.
swell
- Accident report in the Aviation Safety Network
- Aircraft Accident Report Delta Air Lines, Inc., McDonnell Douglas, DC-9-14, N3305L, Greater Southwest International Airport, Fort Worth. Texas. May 30. 1972 (PDF), National Transportation Safety Board .
- Operating history of the machine on planespotters.net
Coordinates: 32 ° 49 '48.7 " N , 97 ° 2' 56.3" W.