"IndiGo has only three such affected aircraft".
InterGlobe Aviation Ltd., which operates IndiGo, declined 0.6 percent in Mumbai.
February 09-Airbus warned Friday that Pratt & Whitney engines on some of its A320neo jets have another problem, and European air safety officials issued emergency restrictions, the Wall Street Journal reported online Friday.
"And, of course, we successfully implemented the engine improvements that we promised to customers in 2017", he said.
Pratt & Whitney and Airbus are working to resolve a new problem with some of Pratt's geared turbofan engines that resulted in the grounding of several Airbus A320neos in India over the weekend, company and European air safety officials said.
Last summer, Pratt & Whitney reported it had more than 8,000 GTF engines on order, not only for Airbus customers but for buyers of Bombardier and Embraer jets, too. "We look forward to adding the GTF-powered A320neo and A321neo to our fleet".
Airbus has stopped accepting new engines from Pratt following higher than normal engine in-flight shut-down (IFSD) and Rejected Take-Off (RTO) involving the PW1100G powered variants of A320neo, which started entering service from January 2016. "In this regard, DGCA, as a precautionary measure, had taken up this issue with the operator to take up the matter with M/s Airbus and M/s Pratt & Whitney", the spokesperson added.
"Pratt & Whitney implemented an engineering change in mid-2017 that was meant to improve the durability of the knife-edge seal for this engine", the company said.
In total, about thirty engines, one or two engines per plane, are affected, according to a source close to the problem. Customers can choose between the Pratt & Whitney model and a type built by the CFM joint venture between General Electric Co and France's Safran SA. The company is also working to assess an overall industrial and delivery plan to minimise customer disruption.
"Pratt & Whitney will be in a position to provide greater detail around the remediation plan and impact, if any, on its 2018 delivery plan, once the regulatory authorities address its proposed solution", it said.
InterGlobe says low-priced carrier IndiGo has since grounded three of its aircraft "in the interim", and that the issue impacts "a limited sub-population" of engines. It is also said extended-range, twin-engine operations (ETOPS) can online be performed with two unaffected engines.
If one engine fails, a twin engine aircraft can safely land with the other operative engine.