01 Jul 2020 Certification Specification (CS) Official Publication Certification Specifications group CS-APU Auxiliary Power Units Regulation group Initial Airworthiness and Environmental Protection Read MoreGet notified via email alerts Read More CS file [pdf] CS-APU Amendment 1 Related ED Decision ED Decision 2020/006/R Explanatory Note [pdf] Explanatory Note to Decision 2020/006/R Change Information [pdf] Change Information — CS-APU Amendment 1