The CO2 metric value is determined during carbon dioxide certification of an aircraft. It is a specific air range (SAR)-based metric related with fuselage size. The CO2 metric value aims at measuring the technology performance of an aircraft type with respect to its fuel efficiency. During certification, it is compared to the applicable CO2 limit as defined in ICAO Annex 16 Volume III.
Certification to the ICAO CO2 standard is generally required for jet airplanes of greater than 5.7 t maximum take-off mass (MTOM) and propeller-driven airplanes of greater than 8.6 t MTOM, with applicability as follows:
- From January 1, 2020 for new designs of subsonic airplanes, including their derived versions, with the exception of jet airplanes with 19 seats or less;
- From January 1, 2023 for derived versions of non-CO2 certified airplanes, and new designs of jet airplanes with 19 seats or less;
- From January 1, 2028 for all in-production airplanes.
The publication of the EASA Aeroplane CO2 Emissions Database fulfils the requirement from ICAO Annex 16 Volume III, Part II, Chapter 1.9, and provides metric CO2 values for European Union aircrafts, as certified by EASA. For more information, visit the EASA Aeroplane CO2 Emissions Database here.