The System FiftyFiveX is a high-performance, two-axis autopilot system ideal for IFR conditions with capabilities such as heading mode, VOR/LOC/GS intercepts, GPS Roll Steering for hands-off navigation, and Control Wheel Steering for manual flight transitions. Integrated into the aircraft radio stack, it boasts an LCD display, compatibility with various cockpit setups, and supports both traditional and advanced EFIS displays. Its features range from nav and glide slope for precision approaches to HDG mode and heading preselect. With hundreds of STCs, options like altitude preselect, electric trim, and yaw damper, it's suitable for light singles to piston twins.

The System FiftyFiveX is a two-axis roll and pitch autopilot which includes heading mode, VOR/LOC/LOC back course intercept and tracking, a gain enhancement feature for tracking GPS Navigation analog left/right deviation signals, glide slope (GS) capture and track, vertical speed command for climb and descent control, altitude hold, pitch trim indicator, control wheel steering (CWS) and VOR/LOC/GS off course deviation warning.

• HDG (heading) mode & heading preselect and hold.* When HDG & NAV are activated simultaneously, enables dual mode Intercept. Autopilot operates in heading mode to automatically intercept and track selected course or localizer; at which point HDG extinguishes.
• Control wheel steering (CWS). Allows you to hand-fly the aircraft and then let the autopilot take over to hold the existing turn rate and vertical speed.
• NAV mode (coupled navigation). Automatically intercepts and tracks enroute NAV signals (VOR/GPS), or LOC (REV for backcourse). 3-level gain selection for NAV mode is automatic. When APR is lit (simultaneous with NAV), indicates high gain localizer mode for high sensitivity coupled approach. Flashing NAV or REV annunciates course deviation by a needle deflection of 50% or more. Selecting APR increases gain sensitivity for VOR or GPS approaches.
• GPSS (GPS Steering). Integrates A/P with GPS Navigator function, which outputs roll steering commands. GPSS does not follow a CDI needle movement; it acts on direct roll steering commands from the Navigator for extremely accurate, hands-off GPS navigation. See separate GPSS data sheet for details.
• TRIM and up/down arrows. Annunciate motion of auto trim or manual electric trim, if equipped; if not equipped, annunciates out-of-pitch-trim condition.
• Pitch Modes. VS, indicating vertical speed control has been selected; ALT indicating altitude hold is engaged, capturing existing altitude when activated; and GS, indicating glide slope coupling is armed and/or active. In altitude hold mode, altitude can be adjusted (trimmed) in 20’ increments using VS knob.