The 238 passengers on board were safe, but left stranded at the airport for several hours, The Times of India reported.
"Around 1 am, the pilot sought permission for an emergency landing. The pilot informed us that supply of fuel from the tank to the engine was not steady. As a result, there was not enough power in the engine," a senior air traffic controller told The Times.
"Pilots have to be careful in case of such a problem. If faults are not detected on time, the aircraft can even run out of fuel. This can eventually lead to a crash," said a senior engineer.
Passengers were eventually sent to a hotel. They could later continue their travel on a scheduled Kolkata-Bangkok flight.
"Ten technicians were flown in from Thailand. Till late on Thursday, they were fixing the snag," an airline official said.
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