On May 11, 1997, at 1830 hours Pacific daylight time, a Robinson R-22 helicopter, N83795, impacted terrain while maneuvering after takeoff at Santa Margarita, California. The aircraft was substantially damaged. The commercial pilot and one passenger received minor injuries. Visual meteorological conditions prevailed for the personal flight. A witness reported that, immediately after liftoff, the aircraft made an abrupt left turn and departed the area at a low altitude in an easterly direction. Shortly thereafter, the helicopter made a low altitude, high speed, flyby in the opposite direction. After the flyby at 2 to 3 feet above the ground, the aircraft climbed to about 40 feet and made a "hard" right turn. It remained in the turning banked attitude until it descended and impacted the ground. In a sketch attached to his statement, the witness indicated that the bank angle was approximately 90 degrees. In his statement the pilot reported that, during the turn, the cyclic pitch control felt "mushy" and slow to respond and he recalled that the low rpm warning horn sounded prior to impact. In his report to the NTSB, the pilot reported that there were no mechanical malfunctions with the aircraft. The density altitude was approximately 4,000 feet.