This document supersedes EUROCAE ED-103 Minimum Operational Performance Specification for INFLIGHT Icing detection Systems Issued July 2001 and SAE AS5498 Issued 2001-10 documents. The document has been updated to address: a.SUPERCOOLED Large Drops (SLD) ICING CONDITIONS of CS-25/14 CFR part 25, Appendix O. b.ICE Water (ICE CRYSTALS and Mixed-Phase) ICING CONDITIONS of CS-25, Appendix P/14 CFR part 33, Appendix D. c.CS-25/14 CFR part 25, Appendix O and CS-25, Appendix P/14 CFR part 33, Appendix D and associated regulatory and regulatory compliance means changes on FIDS equipment design, tests and demonstration.