On the 28th of March, 2018, the Lufthansa Flight LH542 Frankfurt to Bogota operated by an Airbus A340 -300 with the registration D-AIGN developed a serious problem with its flaps shortly after departure.
After completing a few holds over the Dutch coast to lower the landing weight, the Airbus A340 returned back to Frankfurt and landed safely without flaps at around 15:50 UTC.
High speed no flaps landing on a wet runway… these pilots have nuts!
I’m surprised they didn’t try and shoot for somewhere with a dry runway but I can’t fault them for executing a perfect flapless landing.