20160126009479I

N4133D, a training flight, was holding short of kdvt RWY-7R. There were three individuals on board, a student pilot, a flight instructor (CFI), and a second student pilot in the back seat as observer. The tower issued a ?line up and wait? Clearance to N4133D, and the student pilot taxied into position on the runway. As the student pilot was taxiing/turning right onto the runway he turned beyond the runway centerline. This caused him to continue to turn further back to the right to correct his position. The student pilot was holding right rudder and the airplane was still in motion. Simultaneous to this the student began reviewing his checklist so his attention was divided. It was then the tower cleared N4133D for takeoff, and the student pilot responded on the radio which further divided his attention. The CFI indicated that the tower included ?no delay? As part of the takeoff clearance which caused the CFI to focus on the need to begin rolling immediately. The CFI immediately put his hand on the student?s right hand which was covering the throttle lever and pushed it fully forward. Neither the student pilot nor CFI had been covering the brakes. The airplane immediately began accelerating and turning to the right due to the deflected nose-wheel. The student pilot indicated in his statement that he was very startled by unexpected things happening at once. As the airplane traveled to the right side of the runway the student pilot applied left pedal to correct. The airplane then traveled left, across center, and toward the left side of the runway. Approximately 1,000? (Feet) from the starting point N4133D departed the left side of RWY-7R into a gravel area. It was at this time that the CFI took the controls and reduced the power. N4133D traveled a total of approximately 500? Off the side before returning back onto the runway. While off the runway the airplane passed through a gravel area, struck a runway light, passed over intersecting taxiway B3, and onto an adjacent gravel area where it struck a second runway light before returning onto the runway. The engine remained running.

No injuries were reported by any of the three airplane occupants with this incident. An inspection of the airplane revealed metallic gouges to the leading edges at both propeller tips, and a compressed lh-main landing gear strut. There was no other damage observed to the airplane. An inspection of the runway edge showed clear evidence of the path all three wheels made through both gravel portions, as well as the two broken runway lights which were in alignment with the path created by the wheels.