CDG-DTW went mechanical
Was also on the flight. Rear cargo door would not latch. They removed all of the ULD's and tried to get it closed manually. This worked so they opened it up again to re-load the ULD's and found out that the whole system that moves the ULD's around was out of service and not just the latching motor. Thus they cancelled the flight.
Getting everybody to 2E check-in 10-11 for re-booking was a bit of a herding cats event with various staff stationed en route but only providing information when asked. Once in the check-in pens, a multitude of staff provided chairs and water to those who wanted and after 15min or so some service carts showed up with chips and various refreshments.
Most of the Delta passengers slowed things down by ringing Delta in the US which caused chaos as multiple agents were working on the same pax at the same time. It took about 45min to an hour and we were rebooked on AF6 to JFK the next day and headed to the hotel.
Multiple mails from AF, poor communication by ground staff and maybe not enough staff to re-book 315 passengers. It wasnt a disaster, but it shows that there is still a fair amount of progress needed.