Event Details

Title:Midair collision, Continental Air Lines, Inc., Flight 712, Boeing 707-320C, N47330, Floyd Flying Service, Cessna 150J, N61011, Compton, California August 4, 1971
Micro summary:This Boeing 707-320C had a midair with a Cessna 150, receiving significant leading edge damage and destroying the Cessna. The occupants of the Cessna survived.
Event Time:1971-08-04 at 2123 PDT
File Name:1971-08-04-US.pdf
Publishing Agency:National Transportation Safety Board (NTSB)
Publishing Country:USA
Report number:NTSB-AAR-72-5
Site of event:3950 over Compton 9 miles ESE of LAX
Departure:Hilo International Airport, Hilo, Hawaii, USA
Destination:Los Angeles International Airport, Los Angeles, California, USA
Airplane Type(s):Boeing 707-320C
Flight Phase:Approach
Operator(s):Continental Airlines
Type of flight:Revenue
Serious Injuries:2
Other Injuries:0
Executive Summary:On August 4, 1971, at 2123 Pacific daylight time, Continental Air Lines, Inc., Flight 712 (CO 712), a Boeing 707-320C, N47330, on a regularly scheduled flight from Hilo, Hawaii, to the Los Angeles International Airport, Los Angeles, California, and a Cessna 150J, N61011, collided in midair. The collision occurred at an altitude of approximately 3,950 feet over Compton, California, approximately 9 miles east-southeast of the Los Angeles International Airport.

There were 87 passengers, a flightcrew of three, and six cabin attendants aboard the Boeing. There were no injuries. Two persons were on board the Cessna, a pilot-instructor and a student pilot. The instructor received serious injuries and the student received minor injuries. The Cessna was destroyed by the midair collision and subsequent ground impact. The Boeing received substantial damage to the outer right-wing panel.

The National Transportation Safety Board determines that the probable cause of this accident was the minimum opportunity for the flightcrews to see and avoid the other aircraft due to the background lights behind the Cessna and the decrease in the Cessna pilots' visual field resulting from the aircraft's wing while turning.

The Safety Board believes that it is an unsafe practice to engage in student familiarization flights in high-density traffic areas at night. Prior to any such flight , the student and the instructor should familiarize themselves with traffic flow patterns in the area in which they intend to fly. Midair collision accidents can be avoided only by the exercise of extreme vigilance on the part of flightcrews.

The Board recommends that the Federal Aviation Administration disseminate this report to all pilot schools and bring this message to the attention of all flight instructors.
Learning Keywords:Operations - Airspace - Air Traffic Control
Operations - Airspace - See & avoid
Operations - Training Flight
Consequence - Hull Loss


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