A senior government official told PTI that there are at least 25 aircraft each of IndiGo and Go First that are on the ground due to P&W engine problems, and the engine maker is not able to ensure timely deliveries on account of supply chain disruptions. However, according to flight tracking website flightradar24.com, as many as 39 aircraft of IndiGo, comprising 28 A320 neo and 11 A321 were on ground as on February 26.