This advisory circular (AC) provides guidance for powerplant fire testing and recognizes the Society of Automotive Engineers (SAE) Aerospace Standard (AS) 6826, Powerplant Fire Test Standards, as an acceptable Means of Compliance (MoC) for demonstrating compliance to the applicable regulations specified in Appendix A.

This advisory circular (AC) describes an acceptable method for demonstrating compliance with title 14, Code of Federal Regulations (14 CFR) 33.28, 33.68, 33.75,33.89, a nd 33.91, concerning mixed phase, ice crystal icing (ICI), and other icingconditions for engine inlet sensors.

This advisory circular (AC) describes an acceptable method to demonstrate compliance with Title 14, Code of Federal Regulations (14 CFR) §§ 23.2620(a)(1), 25.1583(b)(1), 27.1583(b)(1), 29.1583(b)(1), 33.7(b)(2), and 33.7(c)(2) regarding the requirements for the approval and use of Fuel System Icing Inhibitors (FSII) in engines and aircraft.