S-tec 55x Installation Manual Portable «VALIDATED - 2025»

Connects to the ARINC 429 or analog outputs of your GPS/NAV navigator (e.g., Garmin GTN or GNS series) to allow tracking of GPSS, localizers, and glide slopes.

Engage the autopilot on the ground. Press the Autopilot Disconnect switch on the pilot’s yoke. The system must instantly disengage, providing both an audible and visual warning.

Adjusted so the aircraft smoothly intercepts a heading bug without overshooting or sluggishly drifting.

The S-tec 55x autopilot system consists of several components, including: S-tec 55x Installation Manual

: Installation must be performed by an FAA-certified Avionics Technician or an A&P mechanic under direct supervision.

Wiring the S-TEC 55X requires meticulous attention to shielding, grounding, and pin-out configurations to prevent Radio Frequency Interference (RFI) and Electromagnetic Interference (EMI). 1. Wiring Harness Specifications Use only (or equivalent) Tefzel wire.

The mechanical portion of the S-TEC 55X installation manual requires meticulous attention to detail, particularly regarding servo orientation and bridle cable rigging. Servo Mounting Connects to the ARINC 429 or analog outputs

Protect the system using dedicated, trip-free, resettable circuit breakers. Use separate breakers for Autopilot Power (typically 5A) and Trim Power (typically 5A or 7.5A).

What are you installing this into?

Cable clamps must be torqued precisely and marked with torque seal to ensure they do not slip over time. 4. Electrical Installation and Wiring Diagrams The system must instantly disengage, providing both an

Mount the pressure transducer on a rigid surface to prevent signal "noise." 🧪 Post-Installation Ground Checks Once the hardware is secure, perform these tests:

The servos connect to the aircraft's primary flight control cables via bridle cables and cable clamps.

+--------------------------------------+ | S-TEC 55X Programmer/Computer | +-------------------+------------------+ | +-------------------------+-------------------------+ | | v v +------------------+ +--------------------+ | Roll Axis Loop | | Pitch Axis Loop | +--------+---------+ +--------+-----------+ | | |--> Turn Coordinator Input |--> Static Pressure Transducer |--> HSI/DG Heading Error |--> Internal Accelerometer |--> Roll Servo Output |--> Pitch / Trim Servo Output 2. Main Module Component Specifications

Requires a dedicated, trip-free, resettable circuit breaker (typically 5-amp).

Verify that the bridle cables move smoothly over their respective pulleys. 3. Ground Power-Up and Diagnostics Apply aircraft power and turn on the S-TEC 55X.