PSA Airlines, an airline involved in an aerial accident in Washington, ironically, the name of another airline involved in the two aerial collisions (the worst in the United States) Was saved, contributed to the safety reform of the airspace, and supported the spur. Advance the collision avoidance system.
Among the first discounted careers in the United States, Pacific Southwest Airlines was based in San Diego and was operated mainly as a service in California.
While climbing from San Francisco heading to Ontario in January 1969, the Pacifc Southwest Boeing 727 collided with a light CESSNA 182 aircraft in the control airspace. The aircraft was working at the same wireless frequency.
“Both pilots had equal opportunities to meet each other,” said the National Traffic Safety Commission, saying, “I couldn't see it.”
Despite maintaining the damage, both aircraft landed safely.
However, almost 10 years later, in September 1978, another Pacific Ocean southwest 727, which implements visually and visual approach to San Diego's Lindbergfield, has climbed from the airport in front of the jet. It collided with 172. 。
The 727 pilots were visually contacted with Cessna, but after that they lost sight of the aircraft, and when they were actually under them, they had clearly moved.
The crew did not inform Lindberg Tower that he could no longer see Cessna.
The dispute procedure at that time stated in a survey on accidents of the National Traffic Safety Commission, saying that it was not necessary to warn either aircraft.
When the 727 overtook the mountain climbing Cessna, the right wing of the jet attacked the light aircraft, destroyed it, causing a fire on the wings of 727 to lose control. The 727 dropped CRASH because there were no survivors among 135 residents. The accident caused seven deaths on the ground.
According to this survey, this accident is a terminal airspace where 727 crew members who have not seen Cessna are available, despite the requirements for maintaining visual separation. It was due to approval of the visual separation procedure.
As a result of the collision, US FAA has established a terminal radar service or terminal control area at several airports, but visual separation has been a concept that can be executed.
However, the FAA states that the crash can “increase” regulatory authorities to develop an independent air collision prevention device, and three years later, a program started in 1981 and avoided the traffic collision previously tested. Developed system TCA. Beacon interrogation as a foundation.
The southwestern Pacific Ocean was weakly performed in the US airline deregulation environment since 1978, and was passed on to USAIR, who tried to acquire a career in 1986.
In the same year, another fatal hollow collision in California occurred. This was compared to the accident in the southwestern part of the Pacific Ocean, including the Aeromexycomak Donella Glass DC-9 and the Piper PA-28 near Seritos.
The FAA is a “tool” of the development and implementation of both conflicts, and repeats previous recommendations for NTSB to promote development due to the Seritos accident, and repeated such systems. He states that he is obliged to transport.
The rules for this effect were launched in 1987 by the FAA.
The USAIR continued to integrate in the same year and took over Piedmont Airlines and its subsidiary Jet Stream International Airlines.
Strangely, in 1981, Pedo Mont participated in the TCAS early prototype test in 1981 and tried a more advanced version in the same aircraft type in 1987.
After the acquisition of Piedmont, Usair has saved the PSA brand of Pacific Southwest by renaming Jetstream to PSA Airlines. Following USAIR's merger with American Airlines, PSA airlines are operated as regional feeders for the eastern US flight route, despite the origin of the brand name.
