A Spicejet Boeing 737-800, registration VT-SYA performing flight SG-6480 from Mumbai to Guwahati (India) with 183 people on board, was enroute at FL330 about 180nm east of Kolkata (India) when the crew decided to divert to Kolkata reporting they suspected a fuel leak. The aircraft landed safely on Kolkata's runway 01R about 40 minutes later.

A replacement Boeing 737-800 registration VT-SLH reached Guwahati with a delay of 5 hours.

The airport reported the occurrence aircraft was inspected, no fuel leak was found, however, a water tank was leaking.

The occurrence aircraft returned to service after 5 hours on the ground.