From The Sun via Gizmodo:
Airplane Caught In Duct-Taped Window Shocker
200 passengers got the shock of their lives when their plane was forced to do a U-turn and head straight back to the airport after their pilot's window, which had been 'patched up' with duct tape, came loose.
Apparently the mental-underachievers in the Ryanair maintenance crew thought that just taping the window down on a jetliner would be a good idea. But according to the Irish Aviation Authority the tape was there just as a precaution to secure a new window seal. One passenger told The Sun:
"We were kept in the dark, and were terrified. I could see guys taping in the windscreen with what looked like duct tape or gaffer tape."I'm surprised Ryanair didn't call the tape a 'cost-saving measure', or indeed charge the customers more for the thrill.