A Transavia Airlines Boeing 737-800, registration PH-HSA performing flight HV-6003 from Amsterdam (Netherlands) to Porto (Portugal), was climbing through FL200 out of Amsterdam's runway 24 when the crew stopped the climb advising they had a minor technical problem. The crew decided to return to Amsterdam telling approach they had an anti-ice problem. The aircraft landed safely on runway 18R about 30 minutes after departure.
The aircraft returned to service 24 hours after landing.