The ordeal began after the Delhi-bound flight with 236 passengers on board including CPI(M) General Secretary Sitaram Yechury suffered a technical problem.
Even a change of aircraft did not mitigate the suffering of the stranded passengers, with some of them accusing the state-run airline of misinforming them on the actual departure of the delayed flight.
"Latest from @airindiain 701: flying 6:45 am - after 13 hrs spent on 2 diff aircraft with 2 diff boarding passes & a lot of lies," a passenger tweeted today after the flight AI 701, which was scheduled to take off for Delhi at 5.30 pm last evening.
Air India, however, said that it tried every possible step to fly the stranded passengers to their destination at the earliest.
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"AI 701 (Kolkata-Delhi) had push back at 5.30 pm and after push back there was a snag. Engineers tried to rectify the snag. However, since the problem could not be resolved, the aircraft was declared grounded at 10.10 pm," an Air India spokesperson said here.
He said the airline deplaned all the passengers as another Air India flight was landing at Kolkata airport at 1030 pm and it was decided to operate this incoming aircraft to Delhi.
Since the flight was was to leave only at 6.30 am, passengers were requested to deplane and move to the terminal building, the spokesperson said.
Sources said of the 236 passengers, 105 including Pakistan High Commissioner Abdul Basit took other flights yesterday itself while others spent several hours on board the two airplanes before being taken to the terminal building past midnight. Some preferred to stay inside the aircraft itself.
However, some passengers decided to stay in the aircraft itself till its departure at 6.30 am this morning. These passengers were also served dinner and the airconditioning was kept on for their comfort while passengers who stayed in hotels or at home also boarded the flight in the morning, the statement said.
Yechury, however, preferred to go the party office before returning in the morning to catch the flight along with the stranded passengers and other regular passengers.
Air India said that it is unfortunate that due to the technical problem the passengers were put to inconvenience but safety is paramount for the airline.
"We deeply regret the inconvenience caused to the passengers, however, safety is paramount and hence the delay," the spokesperson said.