19990317002449A

(.4)The CFI indicated that during the flight he was to provide the owner-pilot any needed instruction while the pilot practiced landings. Also, the CFI planned to further familiarize himself with the pilot's airplane. The owner-pilot performed the first landing, the CFI performed the second landing, and the owner-pilot performed the third approach and attempted landing. The CFI reported that the pilot's final approach was flown a little faster than normal. The touchdown occurred nose wheel first, and during rollout the airplane began porpoising. After the third or fourth oscillation, the CFI took the controls and applied full engine power to stabilize the airplane and to take off. According to the CFI, he maintained control of the airplane as it became airborne, and he partially retracted the wing flaps. The airplane climbed, impacted several trees, and came to rest within 1/4-mile south of the airport. Neither pilot asserted that any mechanical malfunction occurred with the airplane during the accident flight. Ranchaero's runway 15 is 2,280 feet long, and its landing threshold is displaced by 200 feet. Trees are located near both the approach and departure ends of the run way. Touch-and-go landings are prohibited. (-23)owner and instructor were practicing takeoff and landings when an attempted go around from an aborted landing resulted in the aircraft not maintaining flying speed and colliding into a tree. The runway is surrounded on all sides by an almond orchard.