1. Japan Airlines Flight 123 (1985)
Single-aircraft disaster with the maximum fatalities, the Japan Airlines Flight 123 crashed into mountains after suffering from an explosive decompression caused by a faulty repaired aft pressure bulkhead. The pilots lost control of the Boeing 747 after all its hydraulic lines were severed and vertical stabilizers destroyed mid-flight. The crash that happened on August 12,1985, took the life of all 15 crew members and 505 passengers, leaving only 4 survivors who were fortunate enough to be rushed to hospital on time.
2. Tenerife Airport Disaster (1977)
March 27, 1977, will always be remembered for one of the most disastrous airlines crashes ever. The accident was caused by the pilot's negligence and irresponsible act. The pilot of KLM Boeing 747 struck the runway for the takeoff without clearance from air traffic control authorities and rammed into Pan Am 747 that was taxiing at the Los Rodeos Airport on the Canary Island of Terrine, Spain. Dense fog was also blamed for this mishap that left a total of 583 people dead and holds the record for highest number of airline passenger fatalities.