I’m a bit of an aviation nut. While it’s not a new plane, it’s certainly not the oldest one flying by far.

Aircraft have a rigorous maintenance schedule. Some components are replaced based on hours used, others are on a calendar schedule: replace it regardless of hours. There are also so-called C- and D-checks: the plane basically gets completely taken apart every 6 to 10 years.

IF DONE CORRECTLY - this means the aircraft will be in excellent condition, even if it reaches that age.

Now, this being Russia in wartime, I wouldn’t be surprised that proper maintenance wasn’t performed. Especially since the AN-24 has an excellent reputation as a rugged, dependable plane. They probably used those resources elsewhere.

Of course, even the best maintained planes can crash. We’ll see what any investigation reveals.