An Air India flight traveling from Tokyo to Delhi was diverted to Kolkata on Sunday after passengers and crew reported experiencing uncomfortably high cabin temperatures.

The airline confirmed that the Boeing 787 Dreamliner, flight AI357, was rerouted as a precautionary measure, and the aircraft landed safely in Kolkata where it is currently undergoing technical inspections.

“Flight AI357 from Haneda to Delhi on June 29, 2025, was diverted to Kolkata due to persistent high cabin temperatures. The aircraft landed without incident and is being examined,” an airline spokesperson stated.

Passengers are being assisted by ground staff in Kolkata, and arrangements are underway to transport them to Delhi. Air India apologized for the inconvenience and assured passengers that support is being provided.

This incident follows a similar occurrence on June 27, when Flight AI639 from Mumbai to Chennai experienced a mid-air return due to a burning smell detected onboard. The aircraft safely returned to Mumbai, and a replacement flight was organized to complete the journey.

“The crew of AI639 took precautionary action after detecting a burning smell. Our ground team in Mumbai supported passengers to minimize disruption,” the airline said.

These back-to-back technical issues have heightened concerns over aircraft maintenance and passenger safety amid ongoing fleet upgrades under Tata Group ownership. The Directorate General of Civil Aviation (DGCA) is expected to investigate both incidents thoroughly and request detailed reports as part of routine safety oversight.