20011114032319A

(.19) On November 14, 2001, at 1421 hours mountain standard time, a sky international (pitts) S-2C, N4HV, departed the right side of runway 22R and struck a taxiway sign at Chandler, Arizona. Chandler air service was operating the rental airplane under the provisions of 14 CFR part 91. The certified flight instructor pilot and commercial pilot undergoing instruction were not injured; the airplane sustained substantial damage. The local instructional flight departed Chandler about 1330. Visual meteorological conditions prevailed, and no flight plan had been filed. The instructor stated they completed airwork in the local practice area and returned to the landing pattern. The student was high on the first approach and the instructor had him complete a go-around. The second approach was satisfactory during the approach and touchdown. During the rollout, the airplane veered to the right and struck a taxiway sign, which resulted in a broken lower spar on the right wing. (-23) pic/instructor stated that on initial approach for landing the student, r.j. jameson, was flying the aircraft under his direction. Following tou chdown the instructor/pic noticed the nose of the plane move to the left and right at which point he advised the student "I have the airplane" and straightened the nose out. As the plane slowed further during the landing roll the nose began to move to the right again. The instructor/pic began pumping the left rudder but the plane continued to turn to the right. The instructor then applied full left rudder pedal but the plane began to exit the runway. As the plane exited the runway the instructor released the rudder pedal with the intention of stopping on the dirt. As the aircraft exited the runway it struck a runway sign with the lower right wing then spun to stop with the engine still running. Right lower wing spar received substantial damage. Student stated that instructor was flying during the entire approach and landing, as they had briefed, while he observed. (.4) on November 14, 2001, about 1420 mountain standard time, an Aviat (pitts) S-2C, N4HV, departed the right side of runway 22R and struck a taxiway sign at Chandler, Arizona. Chandler air service was operating the rental airplane under the provisions of 14 CFR part 91. The certified flight instruc or pilot and commercial pilot undergoing instruction were not injured; the airplane sustained substantial damage. The local instructional flight departed Chandler about 1330. Visual meteorological conditions prevailed, and no flight plan had been filed. The instructor stated they completed airwork in the local practice area and returned to the landing pattern. The student was low on the first approach and the instructor had him complete a go-around. The second approach was satisfactory during the approach and touchdown. During the rollout, the nose of the airplane started to move to the left and the right, and the instructor advised the student that he was taking control of the airplane. The instructor straightened the nose and continued the rollout. As the airplane slowed, the airplane started to move to the right. The instructor pumped left rudder, but the airplane continued to the right. He applied and held full left rudder, but determined that the airplane would depart the runway. He released the left rudder pedal and intended to stop in the dirt. However, he did not see a runway sign, which collided with the lower right wing. The collision spun the airplane around and resultedin substantial damage to the lower wing.