After installation or maintenance, a mandatory self-test and functional checkout must be completed. S-TEC 55 Wiring Installation Guide | PDF - Scribd
How cleanly does the autopilot join a localizer or GPS track? S-tec 55x Installation Manual
Final tuning must be done in the air. This involves setting the levels to ensure the aircraft doesn't "hunt" (oscillate) during altitude hold or navigation tracking. After installation or maintenance, a mandatory self-test and