However, there was no injury to any one since the incident occurred around 2.30 am when movement of passengers was almost nil, airport sources said.
An inquiry is on by airport authorities to identify the cause of the incident, they added.
This is the second time that the false ceiling at the terminal has fallen down since it was formally inaugurated for passenger use in April last.
Three contract workers suffered bruises when a portion of a false ceiling caved in following heavy rains on May 13.