Helios Airways Flight 522 crash near Grammatiko

121 fatalities • Grammatiko, Greece • Flight

A Boeing 737-300 operated by Helios Airways crashed in Greece after the crew became incapacitated during the climb, leading to a loss of control and engine flameout.

What happened

On 14 August 2005, a Boeing 737-300, registration 5B-DBY, departed from Larnaca, Cyprus, bound for Prague via Athens. During the initial climb, while passing 16,000 feet, the pilot notified the airline's operations center regarding an equipment cooling issue and a take-off configuration warning. Following a series of communications with the operations center, the aircraft reached 28,900 feet, after which all radio contact with the flight was lost. At approximately 18,200 feet, the passenger oxygen masks deployed within the cabin.

The aircraft continued its flight path, passing over Athens International Airport and entering a holding pattern near the KEA VOR. During the sixth circuit of this pattern, two Hellenic Air Force F-16 fighters intercepted the plane. Upon close inspection, the intercepting pilot observed that the captain's seat was empty and the first officer was slumped over the flight controls. The pilot also noted dangling oxygen masks and several motionless passengers in the cabin. Later, an individual was seen entering the cockpit and sitting in the captain's seat, but they failed to respond to visual signals from the intercepting aircraft.

As the aircraft's fuel supply was exhausted, the left engine failed at 08:50, followed by the right engine at 09:00 while at an altitude of roughly 7,100 feet. The aircraft entered a rapid descent and struck hilly terrain near Grammatiko, Greece, at 09:03. The accident resulted in 121 fatalities, comprising all 115 passengers and 6 crew members.

Findings

  • The aircraft experienced a loss of communication following reports of technical malfunctions.
  • The deployment of passenger oxygen masks occurred during the climb phase.
  • Fuel depletion caused the subsequent engine flameouts and the uncontrolled descent.

Probable cause

The aircraft crashed after the crew became incapacitated and the engines failed due to the exhaustion of fuel.

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Frequently asked questions

What happened in the 2005-08-14 Boeing 737-300 accident near Grammatiko, Greece?

A Boeing 737-300 operated by Helios Airways crashed in Greece after the crew became incapacitated during the climb, leading to a loss of control and engine flameout.

Were there any fatalities in the 2005-08-14 Boeing 737-300 accident?

The accident was fatal, resulting in 121 fatalities.

What aircraft was involved and where did it happen?

The accident on 2005-08-14 involved a Boeing 737-300, registration 5B-DBY, operated by Helios Airways, at Grammatiko, Greece.

What was the probable cause of the accident?

The aircraft crashed after the crew became incapacitated and the engines failed due to the exhaustion of fuel.

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