Like Germany did from the US for the F-104, India too got nearly full tech transfer to assemble the MiG-21 from Russia. The Indian Air Force has operated around 1200+ MiG-21's (some of them with indian customisations) and has recorded 400 crashes, 200 pilot and 50 civilians deaths due to it.

> Danvir Singh, a military veteran and defence expert, points out that the Russians had designed the MiG-21 in order to intercept American surveillance aircraft. “They are basically manned missiles; their wingspan is narrow, and landing and take-off speeds are very high,” says the retired colonel. “We had no intermediate trainers initially, so our pilots had to jump into a supersonic aircraft. A majority of the accidents earlier happened because of lack of training. They’re still happening because of high speed, low manoeuvrability, and an old platform the maintenance of which has been a big issue.”

(Chequered history: Why the MIG-21 came to be called 'the flying coffin' - https://www.business-standard.com/india-news/chequered-histo... ).