KT 70 REAR CONNECTOR PIN INTERCONNECT (SIMPLIFIED) +---------------------------------------------------------------+ | [Pin 1] Aircraft Power (11-33 VDC) | | [Pin 2] Power Ground | | [Pins A-D, A1-D4] Parallel Gray Code Blind-Mate Inputs | | [Pin 15] Bidirectional ARINC 429 Data Input (Optional) | | [Pin 21] External Mutual Suppression Pulse Line | | [Pin 32] Remote IDENT Switch Input | +---------------------------------------------------------------+ 1. Power and Grounding
The core of the KT 70 Installation Manual revolves around the 24-pin edge connector (or D-sub connector depending on the mod status). Accurate wiring is critical for proper Mode A, C, and S operations. Critical Pin Assignments Pin Number Description Aircraft Power Connect to a 3A or 5A circuit breaker. Pin 2 / B Power Ground Connect to the central aircraft ground bus. Pin 3 Audio Output Provides traffic or system alerts to the audio panel. Pin 18 Suppressor In/Out Links to the DME/TCAS to prevent simultaneous transmission. Gray Code (Altitude Encoder) Inputs
: Digital interface requiring a simple twisted, shielded pair for cleaner routing and robust error checking on newer air data units. 3. Mutual Suppression Pulse
A: The controller isn’t sending speed signal. Check hall sensor wire or external speed sensor connection. Kt 70 Installation Manual
In the quiet corner of a bustling hangar, an avionics technician named Elias cracked open the , the "bible" for the day's upgrade. The task was simple in theory but surgical in practice: replacing an aging transponder with the sleek, digital display of the Mode S powerhouse.
The (Manufacturer Document Number: 006-00673-0001 ) is the authoritative technical reference required to safely mount, wire, configure, and certify the BendixKing KT 70 Mode S ATC Transponder . As a foundational panel-mounted unit in the classic Silver Crown series, the KT 70 relies heavily on strict adherence to its installation specifications to ensure proper Air Traffic Control Radar Beacon System (ATCRBS) and Mode S communication.
Mount the antenna on the bottom of the fuselage. Keep it at least 3 feet away from ADF loops, DME antennas, and the VHF COM antennas to minimize signal shadowing and interference. 5. Post-Installation Configuration and Checkout Pin 18 Suppressor In/Out Links to the DME/TCAS
Install the mounting tray (P/N 047-06368-0000) securely to the aircraft structure. It should be rigid to prevent vibration-induced damage. Clearance:
Adjust the aircraft instrument lighting bus and verify that the KT 70 display dims accordingly. FAA Certification Testing (FAR 91.413)
Ensure the rear connectors align perfectly with the tray backplate. Forced insertion can bend the fragile connector pins. Share public link Standby (SBY)
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Standby (SBY), Test (TST), Ground (GND), ON, and Altitude (ALT). 2. Installation Guidelines