Connect the primary vacuum supply hose to the intake port on the rear of the unit.
The is a foundational piece of avionics, serving as both a primary attitude indicator and a command bar flight director for many general aviation aircraft. As part of the KFC 150/200 autopilot systems, the KI 256 (P/N 060-0017-00, etc.) requires precise installation to ensure accurate flight guidance and gyro performance.
Air-driven internal gyro requiring a vacuum/pressure source delivering 4.5 to 5.2 inches of mercury (in. Hg) . ki 256 installation manual
After completing the installation of the KI 256, perform the following checks:
: Engage the autopilot on the ground. Manually tilt the aircraft's attitude gyro slightly (if using a test stand) or apply control column pressure to ensure the flight surfaces respond in the correct direction to counteract the simulated attitude changes. Share public link Connect the primary vacuum supply hose to the
: Units are manufactured for either 0-degree or 8-degree instrument panels. Verify the part number suffix (-00 for 0° panels; -01 for 8° panels) to ensure correct attitude display.
: A single-box autopilot computer system common in high-performance singles. Manually tilt the aircraft's attitude gyro slightly (if
With engine running and gyro powered, vacuum gauge at KI 256 case must read steady 5.0 ±0.2 inHg after 5 minutes.
Use MIL-W-22759/16 wire. Shielded twisted pairs must be used for the 26VAC 400Hz excitation lines and the pitch/roll analog outputs to prevent EMI (electromagnetic interference) from leaking into the audio panel or GPS lines.