Quick fix ( temporary solution )

　　Hit the book:

　　Subtle

　　Glide

　　Shudder

　　Backfiring

　　Pressurization

　　Precautionary

　　Construe

　　Droll

　　Subtle noises are not the ones to worry aboutComplete silence—suggesting all/both the engines have failed—would probably concern most. But even then, all is not lost—if the engines can't be restarted, planes can actually glide for a remarkable distance. After Air Transat Flight 236 lost power on August 24, 2001, it managed an emergency landing in the Azores after gliding for 120km.