(a) whether after a fatal crash of an MIG-27 fighter aircraft in the recent past near
Silliguri, the Indian Air Force has grounded its fleet of Russian-make MIG-27 fighter aircraft;
(b) if so, the details thereof and the reasons therefor;
(c) whether the defects had been reportedly noticed in the engines earlier;
(d) if so, the details thereof; and
(e) the details of the investigation conducted in the incident and outcome thereof?