The Indian Directorate General of Civil Aviation (DGCA) has launched an extraordinary audit of the country's biggest LCC, IndiGo Airlines (6E, Delhi Int'l), related to the maintenance of Pratt & Whitney PW1000G engines, PTI has reported.

The authority has also served show-cause notices to the carrier's COO Wolfgang Prock-Schauer and head of engineering SC Gupta.

IndiGo confirmed that the DGCA is currently conducting an extraordinary audit in parallel with its scheduled annual check of the airline. The airline, however, denied the "reasons for the audit quoted in the news" and underlined that it exceeds the minimum prescribed safety standards for Indian airlines.

According to the ch-aviation fleets module, IndiGo currently operates seventy-four A320-200neo equipped with PW1127G engines and a single A321-200neo powered by PW1133G units. It is by far the largest operator of the type globally. IndiGo and its fellow Indian low-cost carrier GoAir (G8, Mumbai Int'l) faced problems with the engines in the past, which led to multiple groundings and ETOPS restrictions.