A KLM Cityhopper Embraer ERJ-190, registration PH-EZD performing flight KL-1601 from Amsterdam (Netherlands) to Rome Fiumicino (Italy), was enroute at FL370 about 90nm southeast of Amsterdam, already in German Airspace, when the crew decided to turn around and return to Amsterdam reporting an "anti ice leak in the wing", they would not have been permitted to enter icing conditions or leave Rome after landing, hence they were returning. The aircraft landed safely in Amsterdam about 25 minutes later.
A replacement E190 registration PH-EZF reached Rome with a delay of 2:15 hours.
The occurrence aircraft is still on the ground in Amsterdam 14 hours after landing.