All 133 passengers and six crew had boarded the flight when it was found the three toilets were not functioning, AIE sources said.
Technicians were immediately called in and the problem was rectified, the sources said.
Joy Joseph, a passenger, said they had all boarded the flight which was to take off at 5.55 PM when it was announced the flight had been postponed due to 'technical reasons.'
The flight left at 9.00 PM, the sources said.