Incident Overview
A former USAir employee, who had recently left his position, boarded Pacific Southwest Airlines (PSA) Flight 1771 after leaving a farewell message for friends. Exploiting FAA regulations that allowed airline personnel to bypass standard security checkpoints, the individual carried a borrowed .44 caliber pistol aboard the aircraft.
Event Sequence
During cruise operations, the pilot reported an emergency to Oakland Air Route Traffic Control Center (ARTCC), stating that gunshots had been fired inside the airplane. Within 25 seconds of this report, controllers observed the aircraft beginning a rapid descent from which it did not recover. Ground witnesses noted that the airplane remained intact with no visible fire prior to impact, striking the ground in a steep nose-down attitude.
Investigation Findings
Evidence recovered from the wreckage included a note threatening a former supervisor who was a passenger on the flight. The pistol was found with six expended rounds remaining. Cockpit voice recorder data revealed sounds of a scuffle and several shots fired in or near the cockpit area. The official determination attributed the accident to intentional control interference and sabotage by the passenger, resulting in the incapacitation of both the pilot in command and the copilot. Additionally, the investigation cited inadequate security management by the operator and insufficient standards within FAA operational requirements.