The aircraft was grounded on Monday afternoon after it operated from Nagpur to New Delhi. The sources said oil chips were detected in the engine, a problem responsible for grounding other IndiGo neo aircraft earlier as well.
Confirming the snag, the airline in a statement said "post normal completion of a flight, an IndiGo aircraft was proactively grounded for a routine engine replacement yesterday. There was no impact on our flight operations".
IndiGo and GoAir, both budget carriers, have been grappling with P&W engine problems for several months.
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