New Delhi: To avoid the technical glitches in the Pratt and Whitney (PW) engines, the aviation regulator the Directorate General of Civil Aviation (DGCA).on Tuesday said it has asked the IndiGo and GoAir to replace a total of 180 unmodified PW engines on their A320neo planes with modified ones. The DGCA said the whole process of replacing will be done by the end of May this year. Also Read - PW engine woes: IndiGo grounds A320 neo plane in Lucknow

The DGCA said that the IndiGo and GoAir have 106 and 43 such A320neo aircraft fitted with PW engines in their fleet, respectively. Also Read - Aviation Regulator DGCA Banned IndiGo, GoAir From Using PW Engines-powered A320 Neo Planes 

These old engines need to be replaced as there have been a number of incidents of snag in their PW engines after the induction of the aircraft into service. Also Read - IndiGo, GoAir conduct visual inspections of 50 PW engines post FAA directive, finds no abnormalities

The DGCA had asked the IndiGo in November last year to replace all unmodified engines in its fleet with modified ones by January 31 as there were more LPT (low pressure turbine) failure incidents in the aircraft in IndiGo’s fleet.

Later, the regulator had also extended the deadline to May 30. On the other hand, GoAir was also told by the DGCA to replace all unmodified engines by May 30.

On Tuesday, the DGCA stated that the PW is in the process of setting up a maintenance, repair and overhaul (MRO) facility in India in collaboration with Air India for replacement of 3rd stage LPT (low pressure turbine) at their Mumbai facility.

“This will significantly reduce the time taken for the upgrade. The facility is expected to be operational by the end of February,” the DGCA said.

The DGCA also stated that it involves procurement/replacement of approximately 180 engines, out of which about 90 engines are expected to be replaced by February-end and the rest by the end of May.