DO-326A evidence
PSecAC scope and consistency review for security special condition or cri on the basis
For security lead, certification manager, systems engineer, the trigger is Security special condition or CRI on the basis with a psecac scope and consistency review package that must withstand specialist review. EE indexes PSecAC, connectivity scope, security activity plan, risk assessment plan and tests whether the package supports the claim being made at the current configuration. Unsupported claims are logged with the source record needed. The output gives owners a practical closure sequence.
When this review is needed
- The next milestone depends on psecac scope and consistency review evidence that came from more than one source.
- A matrix, summary, or plan cites records that document control cannot readily retrieve.
- Engineering needs to know which exceptions are technical and which are file control issues.
- The team wants to correct source records before a finding, payment, or delivery decision is requested.
The problem
The risk in psecac scope and consistency review sits in small mismatches: a revision, serial, category, rate source, or assumption that changed after the summary was written. Manual folder checks rarely expose all of those relationships.
What gets reviewed
- Confirm the decision being supported by PSecAC and the evidence standard expected.
- Test whether connectivity scope still agrees with security activity plan after recent changes.
- Check risk assessment plan for unsupported methods, unverified assumptions, and copied closure text.
- Tie PSAC and PHAC interfaces to the responsible engineering or certification owner.
- Prepare a ranked discrepancy list for psecac scope and consistency review.
What gets validated
- The package is complete only when PSecAC, connectivity scope, and security activity plan all support the same review decision.
- Missing rationale fails the check where a classification, category, rate, or method changed between documents.
- Source pedigree is verified for risk assessment plan; unsupported values or untraceable summaries are rejected.
- A reviewer must confirm each flagged issue before it moves into the closure plan.
- Final release is blocked for evidence that cannot be tied to the current article or configuration.
Evidence normally required
Common discrepancies
- Failure modes: maintenance and data-loading interfaces excluded from scope with no rationale.
- security activities that duplicate or contradict the safety process.
- no defined trigger for reassessing threats after entry into service.
What is at stake
A weak trail can make valid engineering work look unsupported. The cost is usually schedule pressure, repeated reviewer questions, and uncertainty about which related documents also changed.
Move from findings to resolution
Identify gaps against the means of compliance.
How the work runs
Frame Psecac Review
Confirm the exact event, affected file set, buyer role, and decision standard before any psecac is treated as sufficient.
Trace Consistency Security
Walk the named evidence from index entry to source artifact and mark where the trail supports, conflicts with, or fails to answer the page-specific question.
Sort Condition Cri
Group exceptions by closure route: document retrieval, data correction, engineering disposition, authority response, or contractual decision.
Package 326a Evidence
Deliver the exception list, evidence map, and owner sequence in a form that can move directly into remediation, submittal cleanup, or transaction negotiation.
What the buyer receives
- Ranked discrepancy register
- Configuration and citation map
- Missing evidence list for psecac scope and consistency review
- Owner action tracker
- Management summary for the next gate
Who uses the output
- security lead separates technical gaps from document control cleanup.
- certification manager briefs management on schedule exposure.
- systems engineer prepares reviewer answers from source records.
How the work fits into the transaction or program
Does the Plan for Security Aspects of Certification scope the right assets and interfaces and commit to activities the program can evidence. The evidence set centers on the security scope definition against actual connectivity (data loading, maintenance ports, wireless, SATCOM), the security development and risk assessment activities promised, interfaces to the PSAC and PHAC, and the refresh commitments for threat model changes. The likely weak points are maintenance and data-loading interfaces excluded from scope with no rationale, security activities that duplicate or contradict the safety process, and no defined trigger for reassessing threats after entry into service. The output gives the security lead a cleanup register for PSecAC scope and consistency review for security special condition or cri on the basis before security special condition or CRI on the basis.
Start with a single asset
Confirm requirements trace through verification.
Regulatory limits
EE's role is limited to reviewing records, mapping evidence, and documenting discrepancies. Final compliance findings, approval decisions, and regulatory acceptance remain with the applicant, authorized persons, and authorities.
What this review does not cover
- Commercial milestone approval
- Engineering redesign
- Formal certification credit acceptance
- Maintenance program approval
Specific to this review
- PSAC and PHAC interfaces can change the meaning of an otherwise accurate report when the method, category, classification, or assumption has moved.
- Repeated wording across rows is a warning sign only after it is compared with the underlying requirement and evidence.
- The review is most useful before formal findings are requested, while source records can still be corrected.
- Human disposition is the control that turns a flagged inconsistency into a usable engineering action.
- The scope uses the Psecac Review Scope Consistency question as the control point, so the review stays tied to Security special condition or CRI on the basis and the buyer decision behind it.
- The evidence starts with PSecAC and follows Security Special Condition Cri references until every exception has a source location and a reason code.
- The finding logic separates missing paperwork, conflicting status, stale revision data, and unsupported disposition because each class closes through a different owner.
- The timing matters for security lead: the output is useful only if the unresolved items are visible before acceptance, submittal, handback, or negotiation pressure fixes the sequence.
- The boundary control keeps Basis 326a Evidence Certification questions in the records or certification lane and sends technical acceptance issues to the authorized people who own them.
- The handoff value comes from Ranked discrepancy register; it gives the next reviewer a precise map instead of another broad request for a better file.
Sources
RTCA. Airworthiness security process objectives for aircraft systems exposed to intentional unauthorized electronic interaction.
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
Frequently asked questions
What makes this evidence review different from a general file audit?
The scope is tied to psecac review scope consistency and to the decision named in the request. A general audit can list weak records; this pass ranks the gaps by whether they block security special condition or cri on the basis or can be closed later without changing the decision.
What evidence has to be available before this work starts?
The starting point is psecac, the current status source, and any index or matrix that tells reviewers where the supporting artifact should live. Missing inputs are logged as findings rather than filled with assumptions.
Who decides whether an open item is acceptable?
The review explains what the evidence supports and gives security lead a closure path. Acceptance remains with the buyer, operator, authority, delegated engineer, or authorized person responsible for the underlying airworthiness or certification decision.
Relevant glossary terms
Related pages
Where this fits
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