Ki 256 — Installation Manual

is a critical flight instrument, installation must be performed by an FAA-approved mechanic .

Are you performing a or a replacement of an existing unit?

The KI 256 is designed to display computed flight director commands through a single-cue command bar. Rather than functioning solely as a passive display, its internal, vacuum-driven or electrically driven rotor provides the stabilization needed to output synchro/pickoff pitch and roll signals directly to the autopilot computer.

| Pin | Function | Wire Gauge | |-----|----------|-------------| | 1 | +14V/28V DC | 22 AWG | | 2 | Ground | 22 AWG | | 3 | Gyro motor power (from KA 51B pin 6) | 22 AWG | | 4 | Synchro rotor R1 | Shielded 24 AWG | | 5 | Synchro rotor R2 | Shielded 24 AWG | | 6 | Synchro rotor R3 | Shielded 24 AWG | | 7 | Flag drive (to KI 525A) | 24 AWG | | 8 | Panel light hot (5V AC/DC or 14V/28V per dimmer) | 22 AWG | | 9 | Panel light ground | 22 AWG | | 10 | Not used | – | | 11 | Not used | – | | 12 | Shield drain (case ground) | – |

Cause: Incorrect lighting or invalid flag voltage logic from the computer. ki 256 installation manual

: After installation, a complete functional test must be performed according to Section VI of the maintenance manual to verify gyro erection, flag behavior, and command bar movement.

Are you using a or an alternative 400 Hz power supply?

: Requires a dedicated circuit path to power the warning flag, which drops instantly from view when internal operational parameters are satisfied. System Calibration and Alignment

8.14 inches (20.68 cm) including connectors Weight: 3.4 lbs (1.54 kg) Mounting: Standard 3-inch ATI panel cutout Electrical Power is a critical flight instrument, installation must be

user wants a long article about the "ki 256 installation manual". I need to provide comprehensive information. I suspect "KI 256" refers to an avionics product, likely a flight instrument. I should search for the manual and related information. I'll search for "KI 256 installation manual" and also for "KI-256" and "KI 256 avionics". search results show various references, but not the dedicated installation manual. I need to gather more specific information. I'll search for "KI 256 installation manual PDF" and "Bendix/King KI 256 installation manual". search results for the dedicated installation manual are not directly available. I need to gather information from other sources to create a comprehensive article. I'll open some of the relevant pages to extract details about the KI 256, its installation, and related procedures. have gathered information from various sources. Now I need to write a comprehensive article. I'll structure it with an introduction, sections on product overview and operational notes, removal and installation, integration with other systems, troubleshooting, replacement options, and a conclusion. search for a dedicated, standalone "KI 256 Installation Manual" can be challenging because the KI 256 is almost always installed as a core component of a larger BendixKing flight control system, such as the KFC 150 or KFC 200. Consequently, the most detailed installation instructions are found within the comprehensive system manuals. This article synthesizes the key installation and integration information for the KI 256, pulling from system manuals, maintenance handbooks, and pilot guides to provide a complete resource.

Connect the command bar steering signals (from the autopilot computer) to the rear connector. Lighting: Connect dimmable 14V or 28V lighting circuit. 3. KI 256 Wiring Diagram Basics

During initial power-up, a distinct "whine" from the gyro's power supply should be audible, indicating the internal motor is spinning up to operational speed.

Use shielded MIL-W-22759/16 wire. Connect to aircraft via MS3112E14-18P (mating connector: MS3116F14-18S). Rather than functioning solely as a passive display,

Once installed, the system requires precise calibration to ensure the autopilot and manual flight director cues are synchronized.

All disassembly and assembly must occur at a static-safe workstation . Components removed from the unit should be stored in static-safe bags to prevent electrostatic discharge damage.

Engine-driven vacuum pump or regulated pressure system Operating Vacuum: 4.5 to 5.2 inches of mercury (in. Hg)

+14VDC or +28VDC at 0.7 Amps maximum (internal lighting); 10VAC at 430Hz with 0.2 Amps maximum (excitation voltage for pick-offs).