I was on a BRU-AMS-LHR mid-afternoon itinerary last week when the E190 operating the AMS-BRU-AMS flight apparently went tech and returned to the Fokker Farm at AMS (caught its runway movement live). Started to look at reaccommodation as we'd miss the LHR connection (only 1:10) once I got the notification that we'd miss the connection. All the KL (and AF) app was only offering was itineraries the next day. I would have been tempted to take ta flight the next day and have an extra day in Brussels with hotel and meals and EU261 comp at KL's expense if I didn't have things to do with a tight schedule in London. As it was, I called KL and they couldn't do anything until the connection was definitely missed. Did call the PSL while waiting to board the delayed flight (another E190 was rustled up) who put me on the next LHR flight (delay was only 2 hrs).