Age restrictions on aircraft
Hi
Age restrictions on aircraft is different for countries. I dont think 15 yrs to 18 yrs is the limit . The aircraft age is actually measured by ycles. Usually this means the number of take offs and landings it makes. Some airlines have very high utilzations rate. Which means they may be only 10yrs old but may may have done lots of cyclles.
According to Boeing and Airbus their aircraft are built for a 20 year service life. Provided it is utilized normally. Some airlines airlines prefer to have a young fleet. Singapore Airlines keep aircraft only for 15 years.
I dont think any nation would ban aircraft that are ove18 yrs old. how ever i think they many restrict aircraft that are over 20 yrs old.