What happened
During the final approach phase to San Francisco Airport, the aircraft experienced a sudden and severe loss of altitude. Within seconds, the plane dropped approximately 400 feet before nosing down sharply. The aircraft ultimately impacted the water in San Francisco Bay, coming to rest roughly two miles short of the intended runway. This accident resulted in the deaths of all 11 occupants on board, including the pilot, copilot, one stewardess, and eight passengers.
Findings
The official Accident Board determined that the crash was caused by an accidental jamming of the elevator controls. The investigation concluded that a microphone had been inadvertently dropped inside the cockpit. It lodged in a position that restricted control movement, preventing the crew from arresting the rapid descent of the airplane.