FAQ Answer

FAQ Answer

What are the 'Chapter 2' and 'Chapter 3' aircraft noise classifications?

Certificated noise levels for larger aircraft are classified by the ICAO 'Standards and Recommended Practices – Aircraft Noise: Annex 16 to the Convention on International Civil Aviation' into a) Chapter 2 types, characterised by the noisier, low bypass turbofan aircraft and early high bypass turbofan aircraft, and b) Chapter 3 types, characterised by the modern, quieter, high bypass turbofan aircraft. Under European legislation, since 2002, 'Chapter 2' aircraft (of over 34 tonnes maximum take-off weight or with more than 19 seats) have no longer been allowed to operate at European airports. There are separate noise certification schemes for small propeller aircraft and for helicopters.