Maintenance Manual Revisions
March 2009
Part Number            Description                            Revision / Date
68S54                  Century IIB & III                      02-28-00 / Rev 6
68S73                  Century I                              01-28-93 / Rev 4
68S94                  1C709- ( ) Electronic Trim Amplifier   03-01-97 / Rev 5
68S304                 NSD 360A & NSD 1000 Manual             12-96 / Rev 2
68S652                 1C714 & 1D755 Gyro Slaving Amp         10-01-99 / Rev 3
68S653                 1C771 Programmer & 1C774               01-14-95 / Rev 1
                       Annunciator
68S1025 comprised of   Century 21 Autopilot System
    68S806               Part 1 (computer)                    02-01-82 / Rev 3
    68S804               Part 2 (system)                      02-01-82 / Rev 3
68S1026 comprised of   Century 31 Autopilot System
    68S912               Part 1 (computer)                    06-01-82 / Original
    68S911               Part 2 (system)                      01-01-82 / Original
68S1027 comprised of   Century 41 Autopilot System
    68S801               Part 1 ( system)                     03-15-95 / Rev 3
    68S659               Part 2 (computer)                    03-15-95 / Rev 3
68S1034 comprised of   Century 2000 Autopilot System          12-98 / Rev 6
    68S1032               Part 1 (system)                     12-98 / Rev 5
    68S1033               Part 2 (computer)                   12-98 / Rev 4
68S1072                1C753-100 & 200 Series Yaw Damper      06-06 / Rev 2
68S1201                Command & Automatic Trim Systems       11-24-98 / Rev