At the end of the check , the engineer failed to reset it to "auto" on completion of the test.Ĭockpit crew also failed to notice the "Pressurization mode change" at numerous occasions and continued with the take off after the aircraft was declared serviceable. The Ground engineer carried out inspection and performed a pressurization leak check using "manual mode" without the engines. The accident aircraft 'Olympia', registered as 5B-DBY arrived at Larnaca International Airport with a PIREP (Pilot Report) of "frozen door seal, and abnormal noises coming from the right aft service door". On that day ,the aircraft was flying from 'Larnaca, Cyprus' to 'Prague, Czech Republic', with a scheduled stopover at 'Athens, Greece', but that crashed on 14th August 2005, killing all 121 passengers and crew on board due to Hypoxia induced Crew incapacitation and Fuel Run out. The Boeing B737-31S aircraft belonged to the Helios Airways and unfortunate journey was Flight 522 on 14 August 2005 that crashed Killing all 121 passengers and crew on board near Grammatiko, Greece. ► Incapacitation of the crew due to hypoxia, ► Non-identification by the crew of the true nature of the problem, ► Non-recognition by the pilots that the pressurization system was set to "manual", The Hellenic Air Accident Investigation and Aviation Safety Board (AAIASB) concluded that below chain of events became the reason of the this Fatal accident.
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