A Germanwings Airbus A319-100, registration D-AGWT performing flight 4U-7460 from Hamburg (Germany) to London Heathrow,EN (UK), was enroute at FL380 about 10nm west of Amsterdam (Netherlands) when the crew initiated an emergency descent to FL100 due to a cracked windshield and decided to return to Hamburg where the aircraft landed safely about one hour after leaving FL380.
A replacement A319-100 registration D-AGWU reached London with a delay of 4 hours.