by the Sperry 2587400-844 air data computer and the co-pilot's altimeter by the Sperry ADC-2OO altitude computer. These altimeters are approved to TSO C9 and ClOb and have a maximum range of 50,000 feet. System wiring is shown on EAS drawings 180608 and 180609. 19. Installed an Aero Mechanism 8047-1