Pacific Southwest Airlines Flight 1771 was a scheduled flight along the West Coast of the United States, from Los Angeles, California, to San Francisco. On 7 December 1987, the British Aerospace 146-200A, registration N350PS, crashed in San Luis Obispo County near Cayucos, after being hijacked by a passenger.

All 43 passengers and crew aboard the plane died, five of whom, including the two pilots, were presumably shot dead before the plane crashed. The perpetrator, David Burke, was a disgruntled former employee of USAir, the parent company of Pacific Southwest Airlines. The crash was the second-worst mass murder in Californian history, after the similar crash of Pacific Air Lines Flight 773 in 1964.