The Air India flight (AI 121D/127) to Chicago via Frankfurt had taken off from Frankfurt for Chicago and was flying over Romanian airspace when the cargo door warning went off in the cockpit.
"Sensing the urgency, the pilot made a technical landing at Bucharest at around 10.25 AM (Indian Time). All the passengers and crew onboard are safe," an Air India spokesperson said.
Soon after the landing, the Boeing-777 aircraft was subjected to checks but nothing was found wrong, probably it was a false alarm, he said, adding the plane has been cleared for take-off.
"Since our arrival slot at Chicago airport has lapsed, we are awaiting airport clearance from there. As soon as we get the clearance, the flight will take off," the spokesperson said.