On May 6, 1964, a Pacific Air Lines Fairchild F-27, N2770R, experienced a catastrophic accident during a flight from Reno, Nevada to Stockton, California. The flight was cleared by Oakland Air Route Traffic Control Center (ARTCC) to climb to 6,000 feet, and maintain that altitude. During the climb, the aircraft left 2,000 feet and was instructed to maintain 5,000 feet by Stockton tower. At 06:43, the flight controller instructed it to turn left, heading 235 degrees, for a final approach course to San Francisco. Subsequently, the flight reported reaching its assigned altitude of 5,000 feet. At 06:45:10, the controller instructed the flight to turn left, heading 235 degrees, for a vector to the San Francisco final approach course. Shortly after, a high-pitched message was received ? ?Skippers shot. We?re been shot. (I was) Try ?in ta help.? ? indicating a gunshot. The flight descended and struck a 800-foot hill, resulting in significant damage. A search revealed a Smith and Wesson Model 27 Magnum revolver containing six empty cartridges, which belonged to a passenger, Mr. Gonzales, who had purchased it on May 6, 1964. Gonzales had advised his friends and relatives that he would die on the 6th or 7th of May. He boarded Flight 756 on the 6th with a return reservation for Flight 773 on the following morning. Gonzales displayed the gun to numerous people at the airport and indicated he intended to shoot himself. He also purchased two insurance policies totaling $105,000. Investigation revealed Gonzales was disturbed and depressed, and he was found to have shot both pilots. The probable cause is that a passenger during flight shot the pilots.On May 6, 1964, a Pacific Air Lines Fairchild F-27, N2770R, experienced a catastrophic accident during a flight from Reno, Nevada to Stockton, California. The flight was cleared by Oakland Air Route Traffic Control Center (ARTCC) to climb to 6,000 feet, and maintain that altitude. During the climb, the aircraft left 2,000 feet and was instructed to maintain 5,000 feet by Stockton tower. At 06:43, the flight controller instructed it to turn left, heading 235 degrees, for a final approach course to San Francisco. Subsequently, the flight reported reaching its assigned altitude of 5,000 feet. At 06:45:10, the controller instructed the flight to turn left, heading 235 degrees, for a vector to the San Francisco final approach course. Shortly after, a high-pitched message was received ? ?Skippers shot. We?re been shot. (I was) Try ?in ta help.? ? indicating a gunshot. The flight descended and struck a 800-foot hill, resulting in significant damage. A search revealed a Smith and Wesson Model 27 Magnum revolver containing six empty cartridges, which belonged to a passenger, Mr. Gonzales, who had purchased it on May 6, 1964. Gonzales had advised his friends and relatives that he would die on the 6th or 7th of May. He boarded Flight 756 on the 6th with a return reservation for Flight 773 on the following morning. Gonzales displayed the gun to numerous people at the airport and indicated he intended to shoot himself. He also purchased two insurance policies totaling $105,000. Investigation revealed Gonzales was disturbed and depressed, and he was found to have shot both pilots. The probable cause is that a passenger during flight shot the pilots.