The fuselage or body of Boeing 737 aircraft which was carrying 136 passengers was extensively damaged, and officials stated it was a potentially unsafe situation. The flight was approaching Muscat when it was redirected to Mumbai.
Photographs and videos show a chunk of the airport's almost five-foot perimeter wall missing.
Another official in Delhi informed that the aircraft's wheels had hit the wall and it is looking into whether a technical snag or pilot error led to the incident.
"The pilots reported all operations normal". The impact tore a hole in the body of the plane but the pilots reported all systems were operating normally and continued to climb to cruising altitude. The aircraft landed at around 5.30 am and taxied to its parking spot even as emergency personnel stood by.
The passengers of the aircraft came to know about this landing only after they were alighted from the aircraft at Mumbai Airport, he said.
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According to the airline, the pilot in command, Captain D Ganesh Babu, has a flying experience on the B737 aircraft of 3,600 hours.
The airport authorities have started a probe into the freak accident while technicians in Mumbai are examining the damaged aircraft. "The two pilots have been derostered pending investigation", the airline said adding that the matter had been reported to the regulator Directorate General of Civil Aviation.
Civil aviation minister Suresh Prabhu on Friday said the government had recently ordered an independent "airline safety" review of Air India.
All passengers were deboarded and an alternative flight was arranged to take them to Dubai with a fresh set of crew.
On hearing about the incident Tamil Nadu Tourism Minister N. Natarajan visited the airport and inspected the damage. Safety of the passengers is of paramount importance for us.