Pratt & Whitney (P&W) President Robert F. Leduc has said that the grounded aircraft belonging to IndiGo and GoAir over engine related safety concerns will be back in operation by April-end.

"You may have seen that the Indian authorities took a decision to ground the fleet in India that have engines of this that had the design escape. We're disappointed with that decision, but I can tell you that by the end of April, that fleet will be back up in the air flying in India," Leduc said during a recent UTC investors' call.