Latest News COVID-19 UPDATE ACS is still operating despite the COVID-19 pandemic. Please contact us on firstname.lastname@example.org if we can assist you with your IOSA inquiries, training and consulting services, etc Read more IOSA PROGRAM CHANGES DUE TO COVID-19 IATA has introduced changes to the IOSA program to allow for extenuating circumstances due to the COVID-19 pandemic. For more details, see: Read more IATA OPERATIONAL SAFETY AUDIT (IOSA) ACS was one of the very first organisations in the world accredited by IATA, through a rigorous process, as an IATA Accredited Audit Organisation (AO) to conduct IOSA audits. TRAINING SERVICES ACS can provide operators and other aviation service providers with customised, in-house courses to suit their needs. Contact us.