Why is tape being applied to this jet engine? When I read this question asking for identification of the aircraft, my immediate question was:

What is that duck tape for?

Whether you call it duck tape or duct tape, why is it being applied to the nacelle?
It's not duct tape. It's speed tape.


  Speed tape is an aluminum pressure-sensitive tape used to do minor repairs on aircraft and racing cars. It is used as a temporary repair material until a more permanent repair can be carried out.


Probably just got a bit of a gap around the cowling or perhaps a loose fastener or two. It's common practice for sealing minor gaps and things until it's next in the hangar for work.

Whilst I was Googling for speed tape, I also found these:

http://www.askthepilot.com/duct-tape/

This is how the wonderful British "tabloid" press deal with aviation stories.  Top marks for getting the "shocked passenger" phrase in.