Muhammad AdnanEngineering & designIdeas engineered. Solutions delivered.

Aerospace & UAVs

Engineering project

ICD — Avionics System Interface Control Document

Comprehensive Interface Control Document defining all electrical, data bus, mechanical, and environmental interfaces for 14 avionics LRUs.

ICDInterface DesignAvionicsSystems Engineering
ICD — Avionics System Interface Control Document — engineering scope diagram Enlarge image
Project-specific scope and deliverables, illustrated from the engineering brief.
ICD — Avionics System Interface Control Document — architecture diagram Enlarge image
Explanatory system architecture: inputs, engineering model and outputs.
ICD — Avionics System Interface Control Document — workflow diagram Enlarge image
Explanatory workflow for the engineering analysis and validation process.

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Project brief

Interface Control Document (ICD) defining all interfaces between 14 Line Replaceable Units (LRUs) in a regional aircraft avionics suite. The document establishes the authoritative reference for all electrical connector pin assignments, data bus protocols and message definitions, mechanical mounting interfaces, environmental classifications, and EMC interface requirements for the avionics system integration.

The document serves as an integration reference across the avionics suite. The explanatory architecture represents information ownership and exchange rather than an actual system wiring drawing.

The engineering challenge

Prevent integration ambiguity across electrical, data, mechanical, and environmental interfaces.

Engineering approach

  1. Organize each LRU's interface definitions around a controlled reference.
  2. Specify connector, message, timing, and mounting information in a consistent format.
  3. Maintain the stated change process so downstream teams can track interface revisions.

Features & capabilities

  • 14 LRU interface definitions: connectors, pin assignments, signal characteristics
  • ARINC 429 message set: label list, data range, refresh rate for 320 parameters
  • ARINC 664 (AFDX): virtual link definitions, bandwidth allocation, latency budgets
  • MIL-STD-1553B remote terminal address assignments and message definitions
  • Discrete I/O: 180 discrete signals — logic level, protection, filtering specifications
  • RS-422/RS-232 port definitions: baud rate, format, protocol, connector type
  • Mechanical: tray dimensions, connector types, alignment pin specifications
  • Change management: interface change request process and configuration control

Software & engineering tools

Microsoft Word, Visio interface diagrams, DOORS NG requirements management, ARINC specifications

More engineering to explore.

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