Answer:
May 7, 1964
San Ramon, California
Pacific Air Lines, Flight 773
Fairchild F-27A
N2770R
Francisco Gonzales, a passenger, who had told several people he was going to kill himself,
shot both the pilot and copilot. The aircraft went into a steep dive and crashed killing all 44 aboard.
F/O = First Officer
F/O Skipper's shot! We've been shot. I was trying to help.