In the next few minutes, several warning lights on the overhead panel in the cockpit illuminated. The alert sound is similar for both warnings. As they passed 12,040 feet (3,670 m), the cabin altitude warning horn sounded. The warning was supposed to have prompted the crew to stop climbing, but the crew mistook it for a take-off configuration warning, which signals that the aircraft is not ready for take-off, and can only sound on the ground. During these checks, the flight crew failed to notice the incorrect setting. The aircraft took off at 9:07 with the pressurisation system still set to "manual", and the aft outflow valve partially open.Īs the aircraft climbed, the pressure inside the cabin slowly decreased. However, the engineer failed to reset it to "auto" after completing the checking.Īfter the aircraft was returned into service, the flight crew overlooked the pressurisation system state on three separate occasions: during the pre-flight procedure, the after-start check, and the after take-off check. In order to carry out this check without requiring the aircraft's engines, the pressurisation system was set to "manual". They requested a full inspection of the door. The inspection was carried out by a ground engineer who then performed a pressurization leak check. That morning, the aircraft arrived from London and the previous flight crew had reported a frozen door seal and abnormal noises coming from the right aft service door. He has 7,549 flight hours throughout his career, with 3,991 of them on the Boeing 737. The first officer was Pampos Charalambous, a 51-year-old Cypriot pilot who had flown exclusively for Helios for the past five years. The captain of the flight was Hans-Jürgen Merten, a 59-year-old German contract pilot hired by Helios for holiday flights, who had been flying for 35 years (previously for Interflug before 1990) and had accrued a total of 16,900 flight hours, including 5,500 hours on the Boeing 737. It was the deadliest aviation accident in Greek history. The aircraft was left to fly on autopilot until it ran out of fuel and crashed near Grammatiko, Greece. It crashed on 14 August 2005, following loss of pressure that incapacitated the crew, killing all 121 passengers and crew on board. These are accessible by car and are clearly signposted.Helios Airways Flight 522 was a flight from Larnaca, Cyprus to Prague, Czech Republic with a stopover to Athens, Greece. The wreckage of the aircraft was removed from the site and a large cross and a church have been built in the memory of the victims of Helios Airways Flight 522. Helios Airways flight 522 was featured on the documentary series Air Crash Investigation (or Mayday in some markets) in the episode called Ghost Plane The chief purser was Louisa Vouteri, 32 years old, a Greek national living in Cyprus. He had accrued 7 549 flight hours during his career. The first officer - Pampos Charalambous, 51 years old, was a Cypriot pilot who flew for Helios for the last five years. He had 16 900 flight hours accumulated during a 35 year old career which included flying for Interflug before 1990. The captain was a 58 years old German contract pilot - Hans Jürgen Merten who had a contract with Helios Airways for the duration of the holiday season. On the day of the fatal flight the aircraft arrived from London Heathrow Airport LHR EGLL at 01.25 AM in the morning and was scheduled to depart Larnaca Airport, Cyprus at 09.00 AM local time for Prague Airport with a stopover at Athens Airport. At the time of the accident Helios Airways had another three leased planes, two Boeing 737-800s and an Airbus A319. Later on 16 April 2004 Helios Airways leased the plane registered it as 5B-DBY and gave the name Olympia to the aircraft. The incident aircraft performed its maiden flight on 29 December 1997 and was operated initially by DBA starting with 1998. It is also the fourth-deadliest crash involving a Boeing 737-300. The aircraft that operated the flight was a Boeing 737-31S. All the 121 people on board (115 passengers and 6 crew) were killed in the crash - this being the deadliest aviation disaster in Greece. The accident was caused by lack of oxygen that incapacitated the crew and passengers, although the airplane kept flying on autopilot and performed holding patterns it eventually run run out of fuel and crashed near Grammatiko just 40 km (25 mi) from Athens. Helios Airways Flight 522 (Flight numbers: HCY 522 or ZU522) was a scheduled passenger flight operated by Helios Airways which crashed into a mountain on the 14 August 2005, just nort of Marathon, Greece while enroute from Larnaca Airport to Prague Airport with scheduled stopover at Athens Airport
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