1. Japan Airlines Flight 123 (1985)http://www.teluguwishesh.com/images/phocagallery/slideshows/Travel/Plane-Crashes/japan-airlines-flight-123.jpg
Single-aircraft disaster with the maximum deaths, the Japan Airlines Trip 123 crashed right into mountains after suffering from an explosive decompression brought on by a faulty repaired aft pressure bulkhead. The pilots lost control of the Boeing 747 after all its hydraulic lines were severed and also vertical stabilizers ruined mid-flight. The accident that happened on August 12, 1985, took the life of all 15 crew members and 505 passengers, leaving only 4 survivors that were fortunate enough to be rushed to hospital on time.
2. Tenerife Airport Disaster (1977)http://s2.dmcdn.net/ZB8qu/1280x720-w_N.jpg
March 27, 1977, will always be remembered in mind for one of the most disastrous airlines crashes ever. The crash was triggered by the pilot's oversight as well as 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 Flight Terminal on the Canary Island of Tenerife, Spain. Dense fog was also blamed for this problem that left a total of 583 people dead and also holds the record for highest number of airline passenger deaths.