"The latest trouble had occurred this Wednesday when IndiGo was operating an Ahmedabad-Kolkata flight on a NEO (VT-ITK). In India, IndiGo and GoAir use A-320 NEO with P&W engines. As a result, the delivery schedule for airlines that ordered the combo of P&W-powered A-320 NEOs have gone haywire. Some airlines like Qatar Airways have even cancelled the order for the plane due to delayed deliveries.With 430 A-320 Neo family planes on order, IndiGo is Airbus's biggest customer globally for this aircraft. Less fuel burn was supposed to be the USP of the A-320 Neo, Earlier this year, the DGCA had ordered immediate examination of P&W on the A-320 Neos.P&W's A-320 Neo engines have been plagued with issues like slow engine startup times and erroneous software messages in the new engine.

Source: Times of India August 18, 2017 11:09 UTC