Title: Navigating the Complexity: An Overview of the King KI 256 Installation Manual
| Pin | Signal | Wire Color (King harness) | Notes | |------|-----------------------------|----------------------------|---------------------------------------------------| | 1 | +28V DC Erection | Red/White | Powers the vertical erection circuits. | | 2 | Gyro Spin Motor (115V AC) | Brown/Black | 400Hz from inverter or alternator. | | 3 | Gyro Neutral (AC return) | Black | Must be isolated from DC ground. | | 4 | Roll Syncro Stator S1 | Blue | To KI 525A or autopilot computer. | | 5 | Roll Syncro Stator S2 | Yellow | | | 6 | Roll Syncro Stator S3 | Green | | | 7 | Pitch Syncro Stator S1 | Orange | | | 8 | Pitch Syncro Stator S2 | White/Orange | | | 9 | Pitch Syncro Stator S3 | White/Green | | | 10 | DC Ground | White/Black | Also connects to gyro case ground. | | 11 | Flag Output (Normally Open) | Gray | Opens on gyro fail, triggers warning flag. | | 12 | Flag Common | Black/White | | | 13 | +28V DC (Aux) | Red | For lighting (if dimmer not used). | | 14 | Lighting Dimmer Bus | Violet | 0-5V DC typical. |
is a critical flight command indicator that integrates a self-contained vertical gyro to provide pilots with essential pitch and roll attitude data. Because it serves as the primary attitude source for various BendixKing Flight Control Systems—including the KFC-150, KFC-200, and KFC-250—following its installation and maintenance protocols is vital for flight safety and autopilot reliability. Core Technical Overview
Step 1: Unpacking and Inspection