Four months after an Indian MiG-27 fighter bomber crashed, and all Indian MiG-27s were grounded, the aircraft have been cleared to fly again. The long delay was caused by fears that all the Russian made engines in these aircraft might have a common problem. This is not a new problem. The MiG-27, and Cold War era Russian warplanes in general, do not age well. India only has about a hundred MiG-27s still operational, and all of them were grounded for over a year (2005-6) when serious problems were discovered with the MiG-27s Russian designed engines. Things have since gotten better,...