| Symptom | Manual Reference | Likely Cause | Solution | |---------|----------------|--------------|----------| | Autopilot rolls left constantly | Section 6.3.2 | Rate gyro drift | Re-zero gyro voltage (adjust R22 on SC-55x) | | No NAV capture | Section 5.2.7 | Missing “Valid” signal from GPS | Verify GPS output (Pin 12 voltage >4V) | | Pitch oscillation (“porpoising”) | Section 8.1.4 | Pitch gain too high | Adjust gain pot (clockwise decreases gain) |
A guide to common issues that might arise and steps to resolve them. S-tec 55x Installation Manual
Descriptions and diagrams of the components of the autopilot system, including the control unit, servos, and any sensors or antennas. | Symptom | Manual Reference | Likely Cause
The S-Tec 55X autopilot system consists of the following components: including the control unit