Helios Airways Flight 522- The Most Shocking Unsolved Plane Crashes

HELIOS AIRWAYS FLIGHT HCY522 BOEING 737-31S  AT GRAMMATIKO, HELLAS On August 14, 2005, Helios Airways Flight 522 crashed into a mountain while on a flight from Larnaca, Cyprus. All 121 passengers and crew were killed in the crash, making it the deadliest in Greek history.The Boeing 737-300 aircraft departed Cyprus with an improper pre-flight pressurization…