A United Boeing 777-300, registration N2748U performing flight UA-48 from Newark,NJ (USA) to Mumbai (India), was enroute at FL330 about 130nm northnortheast of Gander,NL (Canada) when the crew decided to return to Newark due to problems with the right hand main electrical bus, which indicated disconnected several times. The aircraft descended to FL320 for the return and landed safely back in Newark about 5 hours after departure.

A replacement Boeing 777-300 registration N2749U reached Mumbai with a delay of 14.5 hours exciting Mumbai planespotters due to the aircraft carrying the new United livery.

https://flightaware.com/live/flight/UAL48/history/20200312/0054Z/KEWR/VABB