Plan for Hardware Aspects of Certification
PHACSection 09: Hardware Certification (DO-254)
Definition
The primary planning document for DO-254 hardware certification, establishing the agreement between the applicant and the certification authority on the hardware design assurance approach. The PHAC identifies the hardware items requiring design assurance, their design assurance levels, the lifecycle processes to be applied, the standards and guidance to be followed, and any deviations or alternative methods of compliance.
Where This Shows Up
The PHAC is typically one of the first documents submitted to the certification authority and serves as the roadmap for all subsequent hardware certification activities. It must be agreed upon with the certification authority before significant design work begins. Key content includes hardware item identification and classification (simple vs. complex), DAL assignment justification, DO-254 process tailoring for each DAL, identification of previously developed hardware or COTS components, tool assessment strategy, and the planned certification liaison activities. The PHAC is a living document updated as the project evolves.
Primary Sources
Section 10.1 — Planning Process, defines the PHAC as the vehicle for certification planning and authority coordination.
Provides FAA-specific expectations for PHAC content and the certification coordination process.
Artifacts Produced
Planning document agreed with the certification authority that defines the scope, approach, and tailoring of the DO-254 design assurance process for the project.
Across Jurisdictions
FAA AC 20-152, FAA Order 8110.105A
The PHAC is reviewed and agreed upon through the FAA certification project, typically involving the ACO or ODA unit. It may be submitted as a standalone document or integrated into the certification plan.
EASA AMC 20-152
EASA expects a PHAC equivalent, often reviewed as part of the certification programme. The scope and expectations are consistent with ED-80 and EASA AMC 20-152.
TCCA AC 20-152
TCCA follows the PHAC concept as defined in DO-254/ED-80 and coordinates through the TCCA regional office during the certification project.
Related Terms
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