Certification problem
Certification-basis items missing from the compliance matrix
This page is for avionics and equipment suppliers whose compliance matrix omits items that the certification basis requires. It triggers when the basis includes a regulation, special condition, or standard objective that no matrix row addresses. The review reconciles the matrix line by line against the established basis, including the applicable airworthiness paragraphs, special conditions, and referenced standard objectives, to surface what is required but uncovered. You get the list of basis items absent from the matrix and the means of compliance each one still needs assigned.
When this review is needed
- The certification basis was amended and the matrix was never expanded to match.
- A special condition or issue paper imposed a requirement that no matrix row picked up.
- A referenced standard carries objectives the matrix treats as out of scope without saying so.
- The team wants confirmation that nothing in the basis sits without a means of compliance.
The problem
Coverage is the question of whether everything the basis requires has somewhere to be answered. The basis is assembled from regulation, special conditions, and referenced standards, and the matrix is built to address it, but items slip through when the basis shifts or when a standard objective is assumed handled elsewhere. An uncovered item is invisible in the matrix because it simply is not there, so the team can review every row it has and still miss the requirement that has no row at all.
What gets reviewed
- The established certification basis: applicable regulations, special conditions, and issue papers
- Referenced standards and the objectives they place on the article
- Each basis item checked for a corresponding row in the compliance matrix
- Items the matrix marks not applicable and whether that rationale is stated and defensible
- Basis amendments that arrived after the matrix was first populated
- Objectives assumed covered by a parent system that were never confirmed
What gets validated
- Every regulation in the basis maps to at least one matrix entry or a stated not-applicable rationale
- Special conditions and issue-paper requirements each appear in the matrix
- Referenced-standard objectives that apply are represented rather than assumed
- Not-applicable determinations carry a written, defensible reason
- Basis amendments are reflected by matching matrix rows
- No applicable basis item exists without a means of compliance assigned
Evidence normally required
- The established certification basis and any issue papers or special conditions
- The applicable referenced standards and their objectives
- The current compliance matrix and means-of-compliance plan
- The amendment history of the basis since the matrix was built
Common discrepancies
- A basis regulation with no corresponding matrix row at all
- A special condition that was agreed but never carried into the matrix
- A standard objective marked out of scope with no rationale recorded
- A not-applicable call that does not hold once the installation is considered
- A basis amendment the matrix never absorbed
What is at stake
A basis item with no matrix entry is a requirement nobody is answering. It surfaces when a reviewer maps the basis against the submission and finds a regulation or objective with no corresponding claim, and at that point the means of compliance, the evidence, and the trace all have to be built from nothing under schedule pressure.
Move from findings to resolution
Identify the missing data behind the finding.
How the work runs
Inventory the basis
Assemble the regulations, special conditions, issue papers, and standard objectives that apply.
Map to the matrix
Check each basis item for a corresponding matrix entry or a stated not-applicable rationale.
Surface the gaps
List applicable items with no matrix row and not-applicable calls without a reason.
Assign coverage
Name the means of compliance each gap needs and order the closure work.
What the buyer receives
- The list of applicable basis items absent from the compliance matrix
- For each gap, the means of compliance that still needs to be assigned
- A review of not-applicable determinations that lack a defensible rationale
- A closure list ordered by the basis items most central to the article
Who uses the output
- Certification engineers extending the matrix to cover the gaps
- Certification leadership confirming basis coverage before submittal
- Compliance management documenting not-applicable rationales
How the work fits into the transaction or program
This pass answers coverage alone, whether every basis item has somewhere to be addressed. It pairs with checks on citation currency and evidence sufficiency once the matrix is confirmed complete against the basis.
Start with a single asset
Confirm each requirement maps to substantiating evidence.
Regulatory limits
Endeavor Elements compares the applicant's matrix against the established basis. It does not establish the certification basis, decide what is applicable on the authority's behalf, or guarantee that the resulting coverage will be accepted.
What this review does not cover
- Negotiating or establishing the certification basis with the authority
- Authoring the means of compliance or evidence for an uncovered item
- Issuing approvals or making official compliance findings
Specific to this review
- A coverage gap is structurally hard to spot because the missing item leaves no trace in the matrix, unlike a weak entry that is at least present to be questioned.
- Basis amendments and agreed special conditions are the two most frequent sources of uncovered items, because both arrive after the matrix is first populated.
- A not-applicable determination is a coverage claim too, and an undocumented one is itself a gap.
- Objectives assumed satisfied by a parent system are a recurring blind spot when no one confirms the inheritance.
Sources
U.S. Government (eCFR). Type certificates, STCs (Subpart E), TSO authorizations (Subpart O), PMA (Subpart K), and export airworthiness approvals (Subpart L).
SAE International. Development assurance process at aircraft and system level, including requirements capture and validation.
Federal Aviation Administration. FAA type certification process, certification basis establishment, and compliance findings.
Frequently asked questions
Does a not-applicable item still need to appear in the matrix?
Yes. A not-applicable determination is a coverage decision and belongs in the matrix with a written, defensible rationale, so a reviewer can see the basis item was considered and dispositioned.
Relevant glossary terms
Related pages
Where this fits
Talk to an engineer who has done this work
We will walk through your current state, the records or evidence involved, and a scoped first engagement.
Walk through your situation with an engineer who has done this work.