Acudata Systems Co. Inc., and two of its principal officers were indicted by a federal grand jury on eight counts of conspiracy to defraud the U.S. government and to make false statements in connection with the manufacture of missile cable assemblies, wiring harnesses and other tank fire-control system components. The Los Angeles subcontracting firm as well as its president, L. B. Jackson, and his nephew, Robert Jackson, vice president, were also accused of falsifying test documents. Assistant U.S. Atty. David W. Wiechert said the firm violated regulations of the Small Business Act by subcontracting more than 50% of the work to other firms while claiming it was done by Acudata. The indictment charged that the Jacksons created fraudulent records for missile test sets for the Dragon Missile and circuit boards for the M-60 tank by certifying that company technicians had completed required tests when they had not.