Ghost plane | Why was this plane SILENT for hours before crashing? | Helios 522

On August 14, 2005, Helios Flight 522 tragically crashed near Athens, Greece, killing all 121 people on board. The flight, which originated in Larnaca, Cyprus, was en route to Prague with a stopover in Athens when it experienced a series of critical failures. The aircraft, a Boeing 737-300, was in radio silence for over two hours, prompting the Greek military to scramble fighter jets to intercept it. Upon visual contact, the pilots reported seeing a lone figure in the cockpit, while passengers were found unresponsive, wearing oxygen masks.

Investigations revealed that the aircraft's pressurization system had not been correctly configured, leading to hypoxia among the crew and passengers. The captain and first officer failed to notice that the pressurization mode selector was set to manual, a mistake that went unchecked during multiple safety checks. As a result, the cabin altitude rose dangerously high, causing the pilots to lose consciousness. A flight attendant, Andreas Prodramou, who had entered the cockpit later, attempted to communicate but was unable to transmit distress calls due to the effects of hypoxia.

Following the accident, safety recommendations were made to improve training and procedures related to cabin pressurization and emergency responses. The aviation industry has since implemented these measures, resulting in a significant reduction in similar incidents. The crash of Helios Flight 522 remains a somber reminder of the critical importance of adherence to safety protocols in aviation.

Learn more about your ad choices. Visit megaphone.fm/adchoices