However, two possibilities were identified: an electrical malfunction that resulted in the opening of the outflow valve or the inadvertent opening of the aft service door. The Air Accident and Incident Investigation Board (AAIIB) of Cyprus investigated the incident but was unable to determine the exact cause definitively. The cabin crew informed the captain that there had been a loud noise from the aft service door and that a hole, roughly the size of a hand, was visible in the door’s seal. The Disturbing Incidents That Occurred Before the Helios Airways Flight 522 Crashĭuring a previous flight on 16 December 2004, the aircraft encountered a sudden loss of cabin pressure, prompting the crew to initiate an emergency descent. The accident’s negligent nature prompted legal action against Helios Airways and Boeing, and the government of Cyprus subsequently revoked the operating license of Helios Airways the following year. The subsequent investigation carried out by the Air Accident Investigation and Aviation Safety Board (AAIASB) determined that the flight crew had overlooked the crucial step of setting the pressurization system to automatic during the pre-flight checks.Ĭonsequently, the aircraft remained unpressurized throughout the flight, leading to generalized hypoxia among nearly all occupants and resulting in what is commonly known as a ghost flight. This incident is the most fatal aviation accident in the history of Greece. Tragically, the plane eventually crashed near Grammatiko, Greece, devastatingly losing all 121 passengers and crew on board. Helios Airways Flight 522, a regularly scheduled passenger flight with a planned route from Larnaca, Cyprus, to Prague, Czech Republic, including a layover in Athens, Greece, experienced a loss of communication between air traffic control (ATC) and the aircraft, named Olympia, shortly after take-off on August 14, 2005. The Truth Behind the Helios Airways Flight 522 The Lawsuit Against Helios by the Families of the Victims.Investigating the Terrifying Helios Airways Flight 522 Crash.What Caused the Horrifying Crash of the Helios Flight 522?.

Prelude to a Disaster: The Helios Airways Flight 522 Crash.The Disturbing Incidents That Occurred Before the Helios Airways Flight 522 Crash.The Truth Behind the Helios Airways Flight 522.

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