While the KI 256 installation manual is essential today, note that Honeywell no longer manufactures new units. Repair costs have risen (typical bench repair $1,200–$2,500). Several aftermarket options exist, but they require new installation manuals:
If you plan to keep the KI 256, download and print the manual now—digital copies may become harder to find as avionics OEMs purge legacy documents.
The KI 256 is a precise, analog-era instrument that demands respect during installation. Skipping steps in the KI 256 installation manual—especially the gyro nulling and synchro phasing—will result in degraded autopilot performance, uncommanded pitch oscillations, or a failed inspection. ki 256 installation manual
Whether you’re a weekend warrior or a career avionics technician, keep a copy of 006-10593-0000 in your hangar library. Your autopilot will thank you.
Location:
Mount within ±5° of aircraft longitudinal and lateral axes. Maximum angular misalignment: 2° in pitch and roll. While the KI 256 installation manual is essential
Procedure:
Manual No.: 006-18256-00
Revision: 1.2
Applicability: KI 256 Flight Director Indicator (Electric Attitude Gyro) If you plan to keep the KI 256,
Before diving into the ki 256 installation manual, you must understand what this unit is—and what it is not.
If you are holding a KI 256 installation manual (paper or PDF), pay special attention to the Section 2: Unpacking and Inspection. These gyros are sensitive to shock; the manual mandates inspection of the shock mounts on the tray.
Unlike modern AHRS units, the KI 256 requires mechanical and electrical rigging. Section 5 of the ki 256 installation manual details the following procedure: