FAI vs PPAP: When Aerospace Suppliers Need First Article Inspection, PPAP, or Both

The question lands in every dual-cert shop sooner or later. An automotive customer flows down PPAP. An aerospace customer flows down AS9102 First Article Inspection. A new prime asks for both. A program manager who came up through automotive looks at the AS9102 forms and says "this is just PPAP with different paperwork." The aerospace SQE looks at the PPAP submission and says "where is the FAI binder." The quality engineer in the middle has to decide whether the two submissions are the same thing in different forms, two completely different deliverables, or a Venn diagram that needs careful staffing.

The short answer is the third one. FAI and PPAP are both formal first-piece approvals that prove a supplier can build a production part to a released design. They share evidence at the characteristic level, and a disciplined shop can feed both from the same source data. They diverge in what they require around the characteristic data, what governance they sit inside, and which standards the customer audits against. Treating them as interchangeable is how supplier audit findings get written.

This guide covers what each one actually requires, where they overlap, where they don't, which customers ask for which, and how a platform that owns the document trail lets one part run through both lanes without doubling the work.

What FAI Is

A First Article Inspection is a one-time verification, governed by AS9102, that a production process on production tooling in a production location produces a part that conforms to the released design record. The standard is published by SAE International and the IAQG. The current revision is Rev C, released 2023-06-23.

The FAI deliverable is a three-form binder.

• Form 1 is the cover sheet. It carries the part number, drawing number and revision, supplier, FAI type, and the signature that makes the FAI record official under Rev C.
• Form 2 lists materials, special processes, functional tests, and outsourced operations with their certifications.
• Form 3 lists every design characteristic with its requirement, measured result, and measurement method, mapped one to one to the ballooned drawing.

FAI is a process verification. It does not formally require a PFMEA or a capability study. It does formally require evidence that every characteristic on the drawing was measured, that every material and special process was certified, that the ballooning maps one to one to Form 3, and that the binder is signed.

The four triggers for an FAI under AS9102 Rev C are new part introduction, engineering change, process or location change, and a production lapse of two years or shorter if the customer flows it down. Triggers two and three can land as partial re-accomplishments. We covered the form structure and the Rev C delta in AS9102 First Article Inspection: How Form 1, Form 2, and Form 3 Fit Together Under Rev C, the ballooning discipline in Characteristic Accountability in AS9102, and the partial re-accomplishment workflow in AS9102 Partial FAI Re-accomplishment.

What PPAP Is

PPAP, the Production Part Approval Process, is governed by the AIAG PPAP manual, currently 4th Edition. It is the contract that proves a supplier can produce a production part at the required quality level and run rate. PPAP is required by IATF 16949 and is flowed down by every automotive OEM and most Tier 1s.

The PPAP deliverable is a package of up to 18 elements.

The submission is filed at one of five levels. Level 1 sends only the Part Submission Warrant. Level 3 is the most common and sends the warrant with product samples and full supporting data. Level 5 keeps the entire package at the supplier for customer review on site. The level is set by the customer.

PPAP is a system verification. It requires the design FMEA, the process FMEA, a finished control plan, MSA studies on the gauges that prove the dimensional results, and a capability study on every Significant or Critical characteristic. It carries dimensional data, but the dimensional data sits inside a much larger evidence stack about how the process was designed, how the gauges measure, and how the controls catch a drift before the part ships nonconforming.

We covered the full element walkthrough in What is PPAP? A Complete Guide for Quality Engineers and the platform side in PPAP Software: How Purpose-Built Tools Reduce Submission Rework.

Where They Overlap

The two submissions overlap in three places.

Design record and engineering change documents. FAI Form 1 carries the part number, drawing number, and revision. PPAP Element 1 is the design record itself, and Element 2 is the change package that drove the current revision. The same drawing release, the same ECN package, the same revision letter. If your document control system is clean for one, it is clean for the other.

Material and process certifications. FAI Form 2 lists every material, special process, and outsourced operation with certifying documents. PPAP Element 10 carries material and performance test results, and Element 17 carries customer-specific requirements that often include flow-down certifications. The same mill certs, heat treat certs, plating certs, and NDT certs feed both. If a special process source changes, both submissions need an update.

Dimensional results. FAI Form 3 is dimensional results in row form, one row per characteristic. PPAP Element 9 is dimensional results, usually in the same row form. Both are driven from the same ballooned drawing, the same measurement plan, and the same gauge data. A characteristic that was measured for FAI Form 3 was measured. The same measurement satisfies PPAP Element 9 if the measurement system meets the gauge requirements PPAP imposes.

The overlap is real and significant. On a disciplined program, the ballooning, the measurement plan, the dimensional capture, and the certification stack can serve both. The differences sit on either side of that shared spine.

Where They Don't Overlap

The divergence comes from what each standard cares about around the characteristic data.

PPAP requires formal MSA on the gauges. FAI does not. PPAP Element 8 is a Measurement System Analysis study, typically a Gauge R and R, on the gauges that produced the dimensional results. AIAG MSA has acceptance criteria. We walked through those in Gauge R and R Acceptance Criteria. AS9102 expects the measurement method to be identified per row on Form 3 and the gauge to be calibrated, but it does not require a Gauge R and R for FAI signature. An aerospace shop that lifts an MSA study from a sister automotive program saves work. A shop that has never run MSA finds that PPAP exposes measurement uncertainty that FAI never asked about.

PPAP requires a Process FMEA and a Control Plan. FAI does not. PPAP Elements 6 and 7 are the PFMEA and the control plan, and the cascade between them is the spine of the submission. We covered the PFMEA mechanics in Process FMEA (PFMEA): A Practical Guide and the control plan structure in Control Plan in Manufacturing. FAI does not require either deliverable in the binder. Aerospace shops still build a PFMEA because AS9100 Clause 8.1.1 requires operational risk management for production realization, but the PFMEA is not a Form 1 prerequisite and does not get filed inside the FAI package.

PPAP requires a capability study on Significant and Critical characteristics. FAI does not. PPAP Element 11 is the initial process study, typically reported as Ppk on Significant and Critical characteristics with an AIAG-standard acceptance criterion. We covered the underlying statistics in Cpk vs Ppk. FAI requires that the characteristic was measured and conforms. It does not require a Ppk run, does not require thirty consecutive parts, and does not gate the Form 1 signature on a capability number.

FAI requires the ballooned drawing in the binder. PPAP does not require it as a named element. PPAP carries dimensional results in row form, but the AIAG manual does not name a ballooned drawing as a required element. Most automotive customers want one anyway, and Significant or Critical characteristic flow-down requires marking the drawing, but the formal AS9102 requirement that every characteristic on the design record receives a numbered balloon mapped one to one to Form 3 is an aerospace artifact. The discipline carries over to PPAP submissions cleanly. The PPAP standard does not require it.

FAI carries Form 2 line items PPAP does not formalize. Form 2 captures every material, every special process, every functional test, and every outsourced operation as a discrete row, each with its own certification. PPAP carries the same evidence inside Elements 10 and 17, but the row-form Form 2 itself is an aerospace artifact. Automotive customers do not expect Form 2 in a PPAP package.

Governance is different. PPAP sits inside IATF 16949 Clause 8.3.4.4 as the production part approval requirement. The submission level, the documentation retention, and the change resubmission rules are governed by IATF and AIAG. FAI sits inside AS9100D Clause 8.5.1.3 as the production process verification requirement, with detailed mechanics in AS9102 Rev C. The two standards do not reference each other. A customer second party audit that scopes against IATF will not accept "we did the FAI" as evidence for the PPAP. An aerospace SQE auditing against AS9100 will not accept the PPAP package in place of the FAI binder.

Which Customers Ask for Which

The default pattern, simplified.

Automotive OEMs and their Tier 1 supply chains flow PPAP. Ford, GM, Stellantis, Toyota, Honda, Volkswagen, and their Tier 1s flow PPAP. The submission level is per customer. The level 3 default is common. Customer-Specific Requirements in Element 17 vary by OEM. PPAP is the only first-article-style submission the automotive supply chain formally recognizes.

Aerospace primes and their Tier 1 supply chains flow AS9102 FAI. Boeing, Airbus, Lockheed Martin, Northrop Grumman, Raytheon, GE Aerospace, Pratt and Whitney, Honeywell, Collins, Spirit, and their Tier 1s flow AS9102. The standard is the same across the industry because the IAQG harmonizes it. Customer flow-downs add to AS9102 but do not replace it.

Medical device, ISO 13485, and FDA-regulated programs do not formally use either. Design controls under ISO 13485 Clause 7.3 and FDA 21 CFR 820.30 own the first-article-equivalent verification. Suppliers serving Cirtec, Integer, or other contract medical manufacturers run a process validation that resembles PPAP and FAI in spirit but follows a different standard. A medical customer asking for "PPAP" usually wants the evidence stack, not the AIAG warrant.

Defense programs split. Mil-Spec parts that pass through aerospace primes carry AS9102. Mil-Spec parts that pass through automotive-style ground vehicle integrators sometimes carry PPAP. DLA contracts often defer to whichever standard the manufacturing source uses.

Dual-cert shops carry both. Tier 2 machining houses, plating houses, and casting houses that serve both automotive Tier 1s and aerospace primes get asked for both. The same family of parts may ship under PPAP to one customer and FAI to another. The submission lanes are separate and have to stay separate. The underlying source data does not.

The Dual-Submission Case

The shop that runs both lanes well treats the part as the source of truth and the submission as a view.

The part has one design record, one revision, one ballooning, one BOM, one set of special process callouts, one production routing, one set of gauges, one inspection plan, and one set of measurement results. The PPAP submission and the FAI binder are projections of that data into the two standards' required formats. The PPAP-only artifacts, the design FMEA, the process FMEA, the control plan, the MSA study, and the capability study, sit in the part record and feed Element 4 through Element 11. The FAI-only artifacts, the ballooned drawing, Form 2, and Form 1, sit in the part record and feed the binder.

The pattern fails when those projections are built by hand twice. The dimensional capture goes into the FAI Form 3 template and again into the PPAP Element 9 template. The certification stack goes into Form 2 and again into Element 10. The drawing revision lives in the FAI binder filename and again in the PPAP Element 1 filename, and the day one of them updates, the other goes stale.

The pattern works when one platform owns the part record, the ballooning, the measurement results, the certifications, the PFMEA, the control plan, the MSA, the capability study, and the document control. The PPAP package and the FAI binder are generated against the same underlying revision. A change to the drawing revision propagates to both. A new measurement result updates both. A new special process source updates Form 2 and Element 10 in the same write.

This is the document cascade pattern we covered in APQP Software vs Spreadsheets and PFMEA Software vs Templates. It applies the same way here. The first-piece submissions sit on top of the part record, and the part record is one thing.

Where the Platform Helps

QualityEngineer.ai uses Blueprint Intelligence to extract characteristics, tolerances, GD and T, surface finish, and weld symbols from the drawing automatically. The ballooning is generated against the same extraction. The same characteristic list drives FAI Form 3 and PPAP Element 9 dimensional results. The measurement plan is one plan. The measurement capture is one capture.

The PPAP submission lane is in Package, which carries all 18 elements with cross-document validation. The FAI lane uses the same underlying characteristic record and produces Form 1, Form 2, and Form 3 in the AS9102 Rev C format. A drawing revision update touches both lanes from one source. A special process source change touches both lanes from one source. A new measurement result touches both lanes from one source.

The shops that do both well do not do it twice. They do it once and project it twice. The platform exists so the projection is mechanical.

Related Reading

• What is PPAP? A Complete Guide for Quality Engineers for the 18 elements and the AIAG submission levels
• PPAP Software: How Purpose-Built Tools Reduce Submission Rework for the platform side of PPAP submissions
• AS9102 First Article Inspection: How Form 1, Form 2, and Form 3 Fit Together Under Rev C for the Rev C form mechanics
• Characteristic Accountability in AS9102 for the ballooning discipline that feeds both submissions
• AS9102 Partial FAI Re-accomplishment for what changes when a drawing revision lands
• AS9100 Internal Audit Checklist for the AS9100D clause structure that surrounds the FAI evidence trail