The fire started early morning near the Jinnah International Airport, where the engineering facility of Pakistan International Airline (PIA) is located.
Heavy contingents of police and Pakistan Rangers arrived at the scene and cordoned off the area.
A number of fire tenders arrived at the scene and were engaged in fire-fighting inside the PIA engineering complex.
PIA spokesman Danyal Gilani told media that fire had been controlled around 1 PM.
"No one was injured and the incident has not affected flight operations. There was no major damage to the facility," he said.
PIA's engineering complex termed as a sensitive area with high security, where the aircraft equipment are manufactured and repaired.