Wichita ? Investigators are recovering the remaining aircraft wreckage off the roof of a flight safety training facility in Kansas.

Wichita Battalion Chief Stuart Bevis said Monday crews are using a crane to remove the fuselage and other large aircraft pieces from the roof of the building where a small plane crashed on Thursday at Wichita’s Mid-Continent Airport, killing four people.

Bevis says that the National Transportation Safety Board wants to finish its work at the site on Monday.

The twin-engine Beechcraft King Air drifted left of the runway after taking off, then made a steep left bank before plunging into the Flight Safety International Learning Center at the airport.

The pilot and three people inside flight simulators in the building were killed. Five others were injured.