Kolkata-Chennai AI flight delayed after co-pilot reports sick

The Air India Kolkata-Chennai flight was today delayed for almost five hours after the co-pilot reported sick, airport sources said.
The flight carrying 82 passengers was scheduled to depart from the Netaji Subhash Chandra Airport at 6.30 pm but the co-pilot reported sick.
The flight finally took off at 11.20 pm after the co-pilot was replaced.