New Delhi, Apr 25 (IANS): National carrier Air India on Thursday said that no fire incident took place aboard one of its Boeing 777 aircraft stationed at the IGI airport here.

The airline's clarification comes after Indira Gandhi International Airport (IGIA) fire personnel on Wednesday saw "black fumes from the APU exhaust and believing it to be a fire hazard" sprayed the aircraft's Auxiliary Power Unit (APU) and a part of the fuselage with foam spray.

"Yesterday night at Delhi when an engineer was doing routine technical examination of an empty aircraft (777) APU auto shut down took place," the airline said in a statement.

"Airport fire personnel observed black fumes from the APU exhaust and believing it to be a fire hazard sprayed APU and part of the fuselage with foam spray.

"After this event, APU was examined by opening its cowlings and there was no traces of any burn or external damage noticed except for the minor oil leaks traces, which was normal."

The aircraft is deployed on the Delhi-San Francisco route.