Following yet another trouble with Pratt and Whitney (PW) engine, an IndiGo Airbus A320 Neo safely returned to Mumbai on Thursday within an hour of taking off from there for Bengaluru. The Neo (VT-IVU) took off as 6E-236 at 9.38 am. During climb at about 13,000 feet, an older version of PW engine on this plane reportedly experienced heavy vibration.

source https://timesofindia.indiatimes.com/business/india-business/indigo-neo-safely-returns-to-mumbai-after-yet-another-pratt-engine-trouble/articleshow/72381646.cms