Quality Systems, Traceability & Documentation: Bringing an FAA PMA Submission Together
This is the final installment of a three-part series documenting Ergoseal's FAA Parts Manufacturer Approval process in real time. Part 1 — Inside the Process of Qualifying Aircraft Seals for FAA Approval — covered what PMA is and why Ergoseal is pursuing the test and computation path. Part 2 — Defining Performance Requirements & the Case for Test and Computation — covered how requirements are derived and validated without OEM data.
In Part 2, we described the phase where design intent becomes defined, measurable performance requirements. This installment covers what happens next: how formal validation comes together, the quality system and traceability disciplines that support production approval, the documentation package the FAA actually reviews, and what separates a submission that moves smoothly through review from one that doesn't.
In This Blog:
- From Requirements to Formal Validation
- The Quality System Behind Production Approval
- Traceability: Following a Seal from Raw Material to Aircraft
- The Documentation Package: What the FAA Actually Reviews
- What Separates a Smooth Submission from a Stalled One
- Closing Out the Series
From Requirements to Formal Validation
Everything described in Part 2 exists to make this phase meaningful. Formal validation is where independently derived requirements are put to the proof: testing and analysis conducted against documented acceptance criteria, under controlled conditions, producing evidence the FAA can review.
The distinction between early analysis and formal validation matters. Early analysis builds confidence internally. Formal validation builds a record. Test plans define what will be demonstrated and how. Test articles must be traceable and representative of the production design. Results are documented against the requirements they were designed to verify, so that every performance claim in the eventual submission traces back to specific, reviewable evidence.
For a seal qualified under test and computation, this is where the absence of OEM data is felt most. There is no certified baseline to point to. The validation program itself has to carry the full weight of demonstrating airworthiness, which is why the requirements work that preceded it had to be right.
The Quality System Behind Production Approval
In Part 1, Lazarus Adamidis, Ergoseal Business Operations Manager, explained why the FAA requires both design approval and production approval: a good design made poorly is as dangerous as a well-made but unsafe design. This phase of the program is where the production half of that equation is demonstrated in practice.
The regulatory foundation is 14 CFR Part 21, which requires PMA holders to operate under a quality system covering the full life of the part. The required elements read like an inventory of everything that can drift between a drawing and a delivered component: design data control, document control, manufacturing process control, supplier control, inspection and testing, calibration, records, control of nonconforming product, and corrective action.
For sealing components, these controls carry particular weight. Elastomer and polymer parts are sensitive to variables that never appear on a drawing: compound batch variation, cure conditions, tooling wear, storage environment, and shelf life. A quality system for a PMA seal has to control all of them, repeatably, for as long as the part is produced. The FAA is not approving the ability to build one excellent seal. It is approving the ability to build the ten-thousandth seal to the same standard as the first.
That standard is also where the real meaning of production approval lives, and it's the distinction Adamidis draws for buyers evaluating suppliers.
“PMA should reduce technical and regulatory risk, but the quality of the supplier's operating discipline determines how much risk it actually removes. A supplier that genuinely stands behind its production approval should be able to demonstrate that accountability through its processes, records, people, supplier controls, and willingness to address problems. It is not as simple as pointing to an FAA approval number,” he explains.
“For a buyer, that should signal more than regulatory authorization; it should provide confidence that the supplier has the systems, resources, and accountability to consistently sustain compliance and product quality after the approval is issued.”
Traceability: Following a Seal from Raw Material to Aircraft
Traceability is the thread that ties the quality system together, and for seals it deserves its own discussion.
A certified aircraft seal is not just a shape in a material. It is a specific compound, from a specific lot, processed under defined conditions, verified against documented acceptance criteria. Traceability means any individual part can be traced backward through that entire chain: the material lot it came from, the certifications that accompanied that lot, when and how it was processed, who inspected it, and against what criteria it was accepted.
For elastomeric materials, this is a genuine airworthiness control rather than a paperwork formality. Cure dates matter. Batch-to-batch variation in compounding is real. If a material lot is ever found to have a problem, traceability is what makes it possible to identify exactly which parts are affected, and only those parts.
Traceability also runs forward. PMA parts carry required markings identifying the part and the approval holder, so that a technician holding the part years later can verify what it is and who stands behind it.
The Documentation Package: What the FAA Actually Reviews
When people picture FAA review, they often picture a test report. What the FAA reviews is broader: the complete body of approved design data and the system that produced it.
That package includes the requirements and the engineering basis behind them, drawings and material specifications, the analyses and test results that substantiate performance, the process specifications that govern manufacture, and the quality system records that demonstrate conformity. Review addresses both halves of the approval. Design data is evaluated for engineering substantiation, and the production side is evaluated for the ability to consistently reproduce the approved design, which can include conformity inspections and quality system audits.
Documentation is also where the earlier phases of the program converge. The requirements defined during design become the acceptance criteria in inspection. The assumptions documented during analysis become the baseline for evaluating any future change. A PMA is not a one-time event; design changes, material substitutions, and process improvements all have to be evaluated against the approved data for the life of the part. A program with weak records does not just struggle at initial review. It struggles every time anything changes.
There is a reason experienced aerospace buyers ask about documentation before they ask about price. In a regulated environment, the paperwork is part of the part.
What Separates a Smooth Submission from a Stalled One
Across this program, a consistent pattern has shaped how we work: the submissions that move are the ones where the questions were answered before they were asked.
That means requirements with a documented engineering basis rather than inherited assumptions. Test results that map cleanly to the requirements they verify. Configuration control tight enough that every document, drawing, and test article reflects the same revision of the design. And a quality system that was built into the program from the beginning rather than assembled at the end to satisfy review.
The common failure mode is treating the FAA submission as a documentation exercise performed after the engineering is done. In a well-run program, the documentation is the engineering, captured as it happens.
“The key is keeping the design, documents, and evidence aligned. A strong PMA can still encounter problems if records are scattered, revisions don’t match, or the supporting evidence doesn’t clearly back up the engineering decisions,” Adamidis says.
“Good control makes the FAA review smoother and gives the manufacturer confidence that it can stand behind the approval after it’s issued.”
Closing Out the Series
This series set out to document what pursuing PMA actually involves, from the inside, while the work was underway. Part 1 laid out the regulatory landscape and why we chose the test and computation path. Part 2 went deep on deriving performance requirements without OEM data. This final installment covered the validation, quality systems, traceability, and documentation that turn that engineering into an approvable, producible part.
If there is one theme across all three, it is this: PMA is not a checkbox. It is a body of evidence, built requirement by requirement and record by record, that a replacement part is airworthy and will stay that way in production. That is what the approval represents, and it is what buyers should look for when evaluating any PMA supplier.
Questions about PMA seal sourcing or what approval really requires for your program? Contact the Ergoseal engineering team.
About this series: Ergoseal is documenting our FAA PMA process in real time. This three-part series provides aerospace engineers, MROs, and program managers with practical insight into what it takes to qualify a replacement aircraft seal for FAA approval — and why that level of rigor matters to program reliability and supply chain resilience.
