Shortly after 0100 hrs this morning #Truck33 was alerted to the area of the 900 blk of Minna Ave as the search company on Box 38-02. The crew completed primary searches throughout and overhauled before returning to service. Back at the Landover firehouse, the crew cleaned all tools and equipment used and replaced cylinders. Just before 0300 hrs, Co. 28 filled the box assignment for an AC unit on fire with extension into the plenum space. Truck 33 arrived and opened up the roof to help extinguish the fire, they remained on scene for just about an hour before returned to service.