scope:

Abstract:

On the afternoon of June 17, 2004, there was a request to implement an approved Configuration Change Request to increase the left wing-fuselage clearance of the X-43A research vehicle. To accomplish this required some trimming to the left wing leading edge. In order to perform this modification, the avionics technician positioned the left wing leading edge up by halting an incomplete ground Built-in-Test (BIT) that allowed access for the work. Power was removed from the vehicle to allow the work to be performed safely. Contractors then completed the modification to the wing. The technician restored power to the vehicle and attempted to lower the wing by repeating the surface BIT. The rudder swept into the (still raised) wing causing minor structural damage to the rudder and the wing as the surfaces impacted. The BIT was stopped and power to the vehicle was removed.