SAE AS5498A

This document is being revised to address new airworthiness authority rulemaking and guidance since the original issue of the document and to provide more comprehensive coverage of the subject, with a focus on the following areas: Requirements for CS-25/14 CFR Part 25, Appendix (App.) O and CS-25, App. P/14 CFR Part 33, App. D, associated regulatory changes, and means of compliance, New FIDS FUNCTIONS in relation with App. O and/or App. D/P conditions, Rationale between the FIDS response time requirements and the time requirement to annunciate presence of ice accumulation or icing conditions to ensure safe Aircraft operations, Comprehensive test conditions to verify the compliance of the FIDS FUNCTIONS with functional requirements, Guidance to analyze local FIDS conditions Vs Aircraft critical surfaces conditions e.g., critical temperature, freezing fraction, local installation factors, etc. Process/Guidance to verify FIDS performance when Installed on A/C Considerations for revised certification and qualification requirements, Specific considerations for the installation of FIDS on ROTORCRAFT.