Andreas banked the plane away from Athens towards a rural area. Final HopeĬrash site of helios flight 522 – Air Accident Investigation and Aviation Safety Board (AAISB)Īt approximately 08:49 h, during the tenth holding pattern, the F-16 pilot observed an individual who was identified to be Andreas Prodromou, in the cockpit trying to regain control of the aircraft with Haris Charalambous, his girlfriend, assisting him. There are no signs of terrorism and cabin oxygen is deployed. At 08:32 h, the F-16 pilot reported that the Captain’s seat was vacant and the First Officer slumped over the controls. At 08:23 h two F16 fighter aircraft of the Hellenic Air Force intercepted Helios 522 to investigate. Attempts to establish communication on the emergency frequency and other aircrafts were unsuccessful. No responseĪt 07:12 h, the Athinai Acc Controller contacted Helios flight 522 to issue a descent clearance. This was the last communication with the flight crew. Communication between the operations centre and flight crew ended at 06:20 h as the aircraft passes 28 900 ft. As the exchange continues, the passenger oxygen mask was automatically deployed as intended at 06:14 h at an altitude of 18 000ft. However, the captain, already experiencing the onset of hypoxia’s initial symptoms disregarded the question, and instead asked in reply, “Where are my equipment cooling circuit breakers?”. In one of the exchanges, the engineer asked the flight crew to confirm that the pressurization panel is set to AUTO. There was an exchange between an engineer and flight crew to try and rectify the issue. Communication with Company Operations Centre As a result, the crew contacted the company operations centre at 06:14 h to report “take-off configuration warning on” and “cooling equipment normal and alternate off line”. However, the crew misunderstood the alarm and identified the alarm as a takeoff configuration warning. Just 5 minutes after take-off, as the aircraft continue ascending, the cabin altitude warning horn sounded at an altitude of 12 040ft. Helios Airways Boeing 737-31S – Image Courtesy of Alan Lebeda Warning Horn Helios flight 522 departed Larnaca International Airport at 06:07 h (UTC). The aircraft was signed off and sent into service for the next flight HCY522 which was scheduled to leave Larnaca International Airport for Prague, the Czech Republic with a stopover at Athens. Upon completion of the test, the pressurisation system was not reset to ‘auto’ To perform this task, the pressurisation system has to be set to ‘manual’. An engineer proceeded to carry out a pressurization leak check. Prior to the flight, an inspection was done due to an issue on the right aft service door that was reported during its previous flight. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy Notice.The flight path of Helios Airways Flight 522 on 14 August 2005 – Courtesy of Oona Räisänen Maintenance You can change your choices at any time by visiting Cookie Preferences, as described in the Cookie Notice. Click ‘Continue without accepting’ or ‘Customise Cookies’ to decline these cookies, make more detailed choices or learn more. Third parties use cookies for the purposes of displaying and measuring personalised advertisements, generating audience insights, and developing and improving products. This includes using first- and third-party cookies which store or access standard device information such as a unique identifier. If you agree, we will also use cookies to complement your shopping experience across Amazon stores as described in our Cookie Notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements. We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences, and to provide our services, as detailed in our Cookie Notice.
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