33 aircraft, according to Airbus and the European Aviation Safety Agency (EASA).
Airlines with A320neos that have the affected engines will have to ground some of their planes, the Journal said.
The issue is the latest in a string of problems that have bedeviled the GTF program.
'The recommendations are with respect to a certain sub-population of engines, with a particular engine configuration. Affected PW1100G variants include: the PW1127G-JM, PW1127GA-JM, PW1130G-JM, PW1133G-JM, and PW1133GA-JM engines having Engine Serial Number (ESN) P770450 or subsequent. But Airbus has still parked around 30 otherwise completed aircraft at its manufacturing sites in Toulouse and Hamburg awaiting engines.
According to the statement, the grounded aircraft are powered by Pratt & Whitney engines and the move follows a directive from European aviation safety regulator EASA.
Issued on Friday, February 9, the EAD said the measure was necessary after several A320neo Family jets reported In-Flight engine Shut-Downs (IFSD) and Rejected Take-Off (RTO) events. Eleven planes are now, according to the source, grounded the time to change the engines. Both A320neos and A321neos are affected. "IndiGo has only three such affected aircraft", the official said on Saturday. It is also said extended-range, twin-engine operations (ETOPS) can online be performed with two unaffected engines. "We are working with the engine manufacturer to replace the affected engines and to understand the longer-term implications of this situation".
The Directorate General of Civil Aviationofficial said IndiGo has three such aircraft, which have been grounded.
"We have identified the potentially affected engines and communicated with our customers", the Pratt spokesperson said.
A320neo operators with Pratt & Whitney engines have been plagued by reliability issues since they began flying passengers in 2016.
Pratt & Whitney, with the support of Airbus, is in close contact with the airline to address the results of a recent finding related to the issue, it added.