The Key Principles of the ARP4754A include:
Development Life Cycle
Concept Phase
This is the stage where overall aircraft performance and configuration parameters are defined (User Requirements) such as payload, range, size, number and location of engines, airfoil type, new technologies and new manufacturing techniques.
A top-down sequence of development with existing knowledge of intended aircraft function is a convenient method of ensuring the aircraft safety and system development are at the forefront of thought.
Development Phase
Similar to the V-Model, the ARP4754A describes an iterative development process which breaks down into discrete steps that are then referred back to previous steps to ensure compliance. From the figure above, it is clear to see that the “Function” comprises the main step to refer back to. This phase is only complete once:
- Build/test information is provided to a production facility(ies),
- Build Sequence Sheets
- Test Specification Sheets
- All regulatory compliance data is submitted and approved,
- Validation and Verification
- The design has met all internal compliance data (as required),
- User & System Requirements
- Limitations, maintenance and other operational information are provided to the aircraft operators.
- Operating Handbook