May 30, Tracy, Calif. / Aero Vodochody L-39

At 1914 Pacific time, an Aero Vodochody L-39 crashed while performing team aerobatic maneuvers in the vicinity of Tracy. The pilot was killed. A flight of three Aero Vodochody L-39s were practicing low-level team aerobatics in a designated aerobatic box area. Witnesses said the airplane had completed a series of aileron rolls at an altitude of approximately 1,300 to 1,700 feet agl when the accident airplane appeared to level off, then start to descend and wander to the left, eventually crashing at approximately a 60-degree nose down angle.