Ok crew - lets have the Airbus / Antonov A390 pre-departure sing song;
18 smokey engines working on our wings, 18 smokey engines working on our wings & if one smokey engine accidentally quits there'd still be 17 smokey engines working on our wings.
17 smokey engines working on our wings, 17 smokey engines working on our wings & if one smokey engine accidentally quits there'd still be 16 smokey engines working on our wings.
(I think you know the rest of the song
)