The pilot of an IndiGo aircraft operating from Bengaluru to Mumbai declared an emergency on Monday following a caution warning about the air-system.
There was no accident or injury reported in the incident.
The aircraft is being inspected by a maintenance team of the airline carrier.
"IndiGo A320 (6E-6449) operating Bangalore-Mumbai had an air-system indication caution during flight. Pilot followed laid down procedure which required him to prioritise landing at Mumbai. Aircraft is being inspected by the maintenance team. It was not a NEO engine-related concern," IndiGo's statement read.