"Kindly note that after that none of these 23 aircraft, which does not have at least one LPT (low pressure turbine) modified engine on its wings, shall be allowed for commercial operation and their schedule will suitably be curtailed till this is accomplished," the DGCA said in a press note.
On Wednesday, one of the Pratt and Whitney engines of an IndiGo A320neo plane that was heading to Pune stalled mid-air, forcing the pilot to return to Kolkata.
On three consecutive days from October 24 to 26, IndiGo had three in-flight PW engine shutdowns, compelling the DGCA to visit the airlines' premises on Monday to review the maintenance and safety data.
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