Air India said on Tuesday that a passenger aircraft operating from Hong Kong to Delhi was grounded for further investigation after its auxiliary power unit (APU)—located in the tail of the aircraft—caught fire.

The runway and aircraft suffered minor damage as Air India's Kochi-Mumbai flight skidded off the runway at Chhatrapati Shivaji Maharaj International Airport during heavy rain.

An Air India flight from Kochi to Mumbai veered off the runway during landing on Monday amid heavy rainfall, damaging the aircraft's engine and briefly shutting down the airport's main runway. The Airbus A320neo,