Level the aircraft using jacks and a digital protractor across the primary leveling lugs.
The unit is installed from the rear of the panel. Use the specified mounting screws to secure the unit.
Choose the version that matches your aircraft’s instrument panel design. Using the wrong variant will result in incorrect attitude display and autopilot errors.
Bendix/King KI 256 Horizon Gyro: Comprehensive Installation and Maintenance Manual Guide ki 256 installation manual
Several modern avionics offer KI‑256 replacement:
The serves as the primary attitude source and single-cue flight director display for heritage automatic flight control systems like the KFC-150, KFC-200, KFC 225, and KFC 250. Because this unit houses an internal vacuum-driven vertical gyro while outputting highly sensitive analog electrical signals to your flight computer, following precise installation manual protocols is critical to prevent autopilot oscillations, signal degradation, or vacuum system failure.
Which (e.g., KFC 200, KFC 150) are you pairing it with? Level the aircraft using jacks and a digital
The KI‑256 is typically installed as part of a for a Bendix/King autopilot system, or as a direct replacement under a field approval . The original KFC‑150, KFC‑200, and KFC‑225 STCs specifically require the KI‑256 (and in some cases the KVG‑350) as the approved attitude indicator; substituting a different model generally requires new STC approval.
I can provide specific wiring schematics or troubleshooting steps for your exact configuration. Share public link
006-10565-00 Rev: C Applicability: KI 256 Electric Attitude Indicator (14V & 28V systems) Choose the version that matches your aircraft’s instrument
The KI‑256 requires an uninterrupted supply of filtered, regulated vacuum (or pressure) to spin its gyro rotor to between .
:
Please consult the manufacturer or authorized representative for any questions or concerns regarding the installation and operation of the KI 256.