Nov 5 (Reuters) - The international airport in

Louisville, Kentucky reopened for air traffic early Wednesday,

more than 12 hours after a UPS wide-body cargo plane

crashed and erupted into a fireball moments after takeoff,

killing seven people.

Investigators from the National Transportation Safety Board

will be on site Wednesday to begin the process of finding out

what went wrong when the 34-year-old MD-11 cargo plane caught

fire around 5:13 p.m. ET Tuesday and then crashed, igniting

fires in an industrial corridor adjacent to the airport.

The first flight - an American Airlines ( AAL ) passenger jet -

arrived from Dallas shortly before 8 a.m. ET. The runway where

the accident plane departed is expected to remain closed for

another 10 days.