First Article Inspection (FAI): Ensuring PCB Manufacturing Quality

TL;DR: First Article Inspection (FAI) is a comprehensive verification process that confirms a manufactured product meets all design, material, and performance requirements before mass production begins. Required by AS9100 for aerospace manufacturing, FAI validates that production processes can consistently produce conforming products. The process includes dimensional verification, material certification review, functional testing, and traceability documentation – resulting in a First Article Inspection Report (FAIR) per AS9102 standard. FAI costs $2,000-$10,000 depending on product complexity but prevents costly production errors. One undocumented design change can cost $150,000+ in scrap and rework if discovered during production instead of FAI. For aerospace and high-reliability electronics, FAI isn’t optional – it’s the foundation of quality assurance.

You finalize a PCB design. Your contract manufacturer confirms they can build it. Production starts. Three weeks later, you discover a critical dimension is out of spec on 500 assembled boards. Total loss: $75,000.

This never happens with proper First Article Inspection.

I’m Jay Mendpara, CEO of Anzer USA with over 20 years overseeing manufacturing quality systems for aerospace and medical electronics. Our AS9100:2016 certification requires documented First Article Inspection for every new product, design change, and process modification. In my experience, FAI is the single most cost-effective quality investment in manufacturing – preventing problems before they become production disasters.

This guide explains what FAI actually verifies, why it’s mandatory for aerospace electronics, and how the process works from engineering data review through final FAIR documentation.

What Is First Article Inspection (FAI)?

First Article Inspection (FAI) is a formal, documented verification process performed on the first production unit(s) to confirm that all manufacturing processes, materials, components, and specifications meet design requirements before releasing the product for full-scale production. The goal is to catch any discrepancies between design intent and manufacturing reality while the cost of correction is minimal.

Think of FAI as a comprehensive audit of your manufacturing process. It answers critical questions:

• Can your supplier actually build what you designed?
• Are the materials and components correct?
• Do dimensions and tolerances match the drawing?
• Does the product function as specified?
• Is the documentation complete and accurate?

For PCB assemblies, FAI verifies everything from board fabrication tolerances to component placement accuracy, solder joint quality, functional performance, and traceability records. Nothing enters production until FAI proves the process works.

AS9100D Section 8.3.4 requires FAI for:

• New products or assemblies never manufactured before
• Products being manufactured after a period of inactivity (typically 2+ years)
• Design changes affecting form, fit, or function
• Manufacturing process changes (new equipment, relocated production, different operators)
• Sub-tier supplier changes (new PCB fabricator, different component distributor)

At Anzer’s AS9100 facility, we perform FAI on every new aerospace assembly. Even if we’ve built similar products, each unique design requires its own FAI. The AS9102 standard – which defines the FAI procedure – leaves no room for shortcuts.

Why FAI Matters: The Cost of Getting It Wrong

I’ve seen manufacturers try to skip FAI to save time and cost. It always backfires.

Real Example from Our Factory Floor: A customer brought us an aerospace avionics assembly after their previous manufacturer failed to perform proper FAI. The design specified a specific torque rating for mounting hardware. The manufacturer assumed standard hardware would work. It didn’t – vibration testing revealed loosening that could cause catastrophic failure. The customer had already received 200 units. All 200 were scrapped. Cost: $340,000 in materials, labor, and schedule delays. A $4,500 FAI would have caught the issue on unit #1.

Why FAI prevents disasters:

1. Catches Design-to-Manufacturing Mismatches: Designs that look perfect on paper sometimes can’t be manufactured as drawn. Component footprints might be too tight for hand placement. Drill holes might interfere with internal PCB traces. Test points might be inaccessible. FAI forces these conversations before production.
2. Verifies Supplier Capabilities: Just because a supplier claims they can hold ±0.001″ tolerances doesn’t mean they actually can. FAI proves capability with measured evidence.
3. Documents Component Traceability: FAI links specific component lot codes to the first article. This creates a baseline for future component traceability in production.
4. Establishes Inspection Criteria: Production inspectors need to know what’s critical and what’s acceptable. FAI creates the measurement baseline and defines acceptance limits.
5. Protects Against Process Drift: When production starts months after FAI, the FAIR documentation proves what was originally verified. Any deviations from the first article require investigation.

Industry data shows that FAI reduces production defects by 60-80% compared to manufacturers who skip the process. The investment is modest – typically $2,000-$10,000 depending on product complexity. Compare that to scrapping 200 units at $1,700 each because a critical dimension wasn’t verified.

The FAI Process: AS9102 Requirements

AS9102 defines the FAI procedure and documentation requirements. Here’s how we execute it at Anzer:

Step 1: Manufacturing Planning and Process Setup

Before building the first article, we review all engineering data:

• Complete bill of materials (BOM) with approved vendor list
• PCB fabrication drawings with all dimensional callouts
• Assembly drawings showing component placement and orientation
• Electrical schematics for functional verification
• Test specifications and acceptance criteria
• IPC class requirements (Class 2 or Class 3 workmanship standards)

We set up production processes as they’ll be used in volume manufacturing – same equipment, same operators, same procedures. The first article must represent actual production conditions, not a “lab build” with special handling.

Step 2: First Article Build

We manufacture the first article(s) following documented work instructions. For complex assemblies, we typically build 3-5 first articles to verify process repeatability.

During the build, we document:

• Actual component lot codes used
• Any process deviations or operator notes
• Assembly time and any difficulties encountered
• Special tooling or fixtures required

This isn’t about building a “perfect” unit with extra care. It’s about building a normal unit and measuring whether normal processes meet requirements.

Step 3: Dimensional Verification

Every dimension on the assembly drawing gets measured and recorded. For PCB assemblies, this includes:

• Board dimensions and edge clearances
• Component placement locations (X-Y coordinates for critical components)
• Component orientation verification
• Hole sizes and locations (mounting holes, test points)
• Clearances between components and board edges
• Critical heights (components that must fit within enclosure constraints)

We use calibrated measurement equipment – coordinate measuring machines (CMM) for critical dimensions, digital calipers for general measurements, optical comparators for fine-pitch component placement.

Every measurement is recorded in the FAIR with:

• Nominal dimension from drawing
• Tolerance specified
• Actual measured value
• Pass/Fail determination
• Measurement method and equipment ID

For a complex aerospace PCB with 2,000 components, dimensional verification might involve 200-300 individual measurements.

Step 4: Material and Component Verification

We verify that every component and material matches specifications:

• Component part numbers cross-checked against BOM
• Manufacturer lot codes and date codes recorded
• Certificates of Conformance (C of C) reviewed for all critical components
• Material certifications for PCB substrate, solder, conformal coating
• Any counterfeit detection testing performed per AS5553 or AS6496

This creates the component traceability baseline. We know exactly which lots were used in the first article. Future production must use equivalent approved sources.

Step 5: Functional and Performance Testing

The first article undergoes complete functional testing per the test specification:

• Power-on verification (all voltages within spec)
• Functional testing of all circuits
• Communication interface testing (SPI, I2C, CAN bus, etc.)
• Environmental stress screening if specified (temperature cycling, vibration)
• Burn-in testing if required
• Any customer-specific performance tests

Test results are documented with objective data – not just “pass/fail” but actual measured values. If the spec says output voltage should be 5.0V ±0.1V, we record the actual voltage (e.g., 5.03V) with the test equipment used and calibration due date.

Step 6: Workmanship Inspection

An IPC-certified inspector examines solder joints, component placement, cleanliness, and overall workmanship per IPC Class 2 or Class 3 standards.

For aerospace assemblies requiring Class 3 workmanship, this inspection is exhaustive:

• 100% visual inspection of all solder joints at 3-10x magnification
• X-ray inspection of hidden joints (BGAs, QFNs)
• Cleanliness verification (no flux residue, contamination, or particulates)
• Component damage inspection (no cracked bodies, lifted leads)
• Marking and labeling verification

Any workmanship defects discovered trigger root cause analysis and process correction before approving the FAI.

Step 7: FAIR Documentation

All FAI data compiles into a First Article Inspection Report (FAIR) per AS9102. The FAIR includes:

Form 1 – Part Number Accountability:

• Product identification, drawing revision, specification references
• Manufacturing location and date
• Reason for FAI (new product, design change, process change)

Form 2 – Product Accountability:

• Detailed dimensional verification results
• Material certifications and component traceability
• Special process certifications (soldering, coating, etc.)

Form 3 – Characteristic Accountability (for each measured feature):

• Drawing callout reference
• Nominal dimension and tolerance
• Actual measured value
• Measurement method and equipment
• Inspector signature and date

Supporting Documentation:

• Certificates of Conformance for all materials and components
• Functional test reports with actual data
• IPC workmanship inspection reports
• Photographs of critical features or areas of concern
• Engineering approval signatures

A typical FAIR for a complex PCB assembly might be 50-150 pages of documentation. This becomes the permanent quality record proving the first article met all requirements.

FAI Timeline and Cost

OEMs frequently ask: “How long does FAI take and what does it cost?”

Typical FAI Timeline:

• Simple PCB assembly (50-100 components, Class 2): 1-2 weeks
• Complex PCB assembly (500-2,000 components, Class 3): 2-4 weeks
• Box build with multiple PCBs and mechanical integration: 3-6 weeks

Time breakdown:

• Manufacturing planning and setup: 2-3 days
• First article build: 1-3 days depending on complexity
• Dimensional verification: 2-5 days (more for complex assemblies)
• Material/component verification: 1-2 days
• Functional testing: 1-3 days (longer if burn-in or ESS required)
• FAIR documentation: 2-4 days
• Customer review and approval: 1-5 days

Typical FAI Cost:

• Simple commercial assembly: $2,000-$4,000
• Standard aerospace/medical assembly: $4,000-$7,000
• Complex high-reliability assembly: $7,000-$10,000+

Cost drivers:

• Number of dimensions to verify
• Material certification requirements
• Complexity of functional testing
• IPC class (Class 3 inspection takes 3-5x longer than Class 2)
• Customer-specific requirements beyond AS9102 baseline

These costs include all labor, equipment, documentation, and material for the first article units. It’s a significant investment – but trivial compared to the cost of production defects.

One aerospace customer initially balked at our $6,800 FAI quote for a complex avionics assembly. We explained the alternative: build 100 units, discover a critical dimension issue, scrap all 100 units at $1,200 each = $120,000 loss. They approved FAI immediately.

AS9100 vs AS9102: Understanding the Standards

There’s often confusion between AS9100 and AS9102. Here’s the distinction:

AS9100 (Quality Management System Standard):

• Defines overall quality management requirements for aerospace manufacturers
• Based on ISO 9001 with aerospace-specific additions
• Requires FAI but doesn’t define how to perform it
• Section 8.3.4 states that “First article inspection shall be performed as specified by the customer or the organization”
• Certification is to AS9100; manufacturers are audited for compliance

AS9102 (First Article Inspection Procedure):

• Defines the specific procedure for performing FAI
• Specifies FAIR documentation format (Forms 1, 2, and 3)
• Not a certification standard – it’s the procedure manual for AS9100’s FAI requirement
• Referenced by AS9100 as the method for executing FAI

Think of it this way: AS9100 says “you must do FAI.” AS9102 says “here’s how you do FAI correctly.”

At Anzer’s AS9100:2016 certified facility, we follow AS9102 procedures for all aerospace FAI. Our quality management system (AS9100) requires it, and AS9102 defines the execution method.

FAI vs PPAP: Aerospace vs Automotive

If you’ve worked in automotive manufacturing, you’ve heard of PPAP (Production Part Approval Process). FAI and PPAP serve similar purposes but have key differences:

Both processes verify first production units meet requirements. PPAP is more comprehensive but designed for high-volume automotive production. FAI is streamlined for aerospace’s lower-volume, higher-complexity products.

If you’re manufacturing aerospace electronics, AS9102 FAI applies. If you’re building automotive electronics, IATF 16949 and PPAP apply. Some manufacturers serve both industries and maintain both processes.

When FAI Needs to Be Repeated

FAI isn’t a one-time event. AS9100 requires new FAI when:

Design Changes:

• Drawing revision that affects form, fit, or function
• Engineering change orders (ECOs) modifying specifications
• Material substitutions or component alternates

Process Changes:

• New manufacturing equipment introduced
• Process relocated to different facility or production line
• Significant process parameter changes (reflow profile, curing times)

Supplier Changes:

• New PCB fabricator
• Different component distributors or manufacturers
• Sub-tier process changes (plating vendor, conformal coating applicator)

Production Interruptions:

• Manufacturing inactive for 2+ years
• Operator or procedure changes affecting critical processes
• Loss of traceability or process documentation

Customer-Specified Triggers:

• Some aerospace customers require annual FAI verification
• Others require FAI after any process audit finding
• Contract specifications may add triggers beyond AS9100 baseline

At Anzer, we maintain a Product Change Notice (PCN) system that automatically flags when changes require new FAI. This prevents unauthorized changes from reaching production without proper verification.

The Anzer FAI Process: AS9100 Excellence

Here’s how we ensure every FAI meets aerospace quality standards:

Dedicated FAI Team:

• IPC-certified inspectors trained in dimensional verification
• Quality engineers experienced in AS9102 documentation
• Test technicians certified for functional verification
• Dedicated FAI workbench with calibrated measurement equipment

Customer Collaboration:

• Pre-FAI engineering review to clarify critical dimensions
• Real-time communication during FAI if issues arise
• Draft FAIR review before final submission
• Customer witness options for critical first articles

Comprehensive Documentation:

• Complete FAIR per AS9102 Forms 1, 2, and 3
• Photographic evidence of critical features
• All material certifications and component C of C
• Test data with equipment calibration records
• Digital FAIR delivery (PDF) plus hard copy archive

Post-FAI Support:

• FAIR retained for product lifetime per AS9100 record retention
• Production work instructions updated based on FAI learnings
• Inspection criteria communicated to production team
• First article unit retained as golden sample for comparison

In 33+ years of electronic contract manufacturing (starting as Western Reserve Controls), we’ve performed thousands of FAI submissions. Our AS9100 surveillance audits consistently show zero findings related to FAI – our process is that robust.

FAI: The Foundation of Aerospace Quality

First Article Inspection isn’t bureaucratic overhead – it’s the most cost-effective quality assurance investment in manufacturing.

For $2,000-$10,000, you verify that your product can be manufactured correctly before committing to production volumes. You document a quality baseline. You catch design-to-manufacturing mismatches. You prove supplier capabilities with measured evidence.

Skip FAI and you risk discovering problems 100, 500, or 1,000 units into production – at 100x, 500x, or 1,000x the cost of fixing them during FAI.

For aerospace, medical, and other regulated electronics manufacturing, FAI isn’t optional. AS9100 and ISO 13485 require it. Customers expect it. Smart manufacturers embrace it as competitive advantage.

If you’re an OEM evaluating contract manufacturers for aerospace electronics, ask about their FAI process. Can they show you example FAIRs they’ve completed? Do they have dedicated FAI inspection equipment? Are their inspectors IPC-certified and trained in AS9102 procedures? Do they understand when re-FAI is required?

At Anzer USA, First Article Inspection is built into our AS9100:2016 quality system. Our documented procedures, trained personnel, and calibrated equipment ensure every FAIR meets aerospace industry standards. We don’t release products to production until FAI proves the process works.

If your product requires proven aerospace quality and documented first article verification, let’s discuss how our FAI process protects your program from costly production errors.

Frequently Asked Questions About First Article Inspection (FAI)

Q: Can you skip FAI if you’re building a “simple” assembly or low quantities?

A: No, if AS9100 or customer contract specifications require FAI. The standard doesn’t exempt simple products or low volumes- in fact, low-volume products often have higher risk because there’s less opportunity to refine the process during production. A “simple” 20-component aerospace board still requires full FAI per AS9102 if it’s new to manufacturing. The complexity affects FAI cost and timeline but not the requirement. Some commercial (non-aerospace) manufacturers may choose to skip formal FAI for truly simple products, but they accept the risk of discovering manufacturability issues during production. For regulated industries, FAI is mandatory regardless of product complexity.

Q: Who approves the FAIR – the manufacturer or the customer?

A: Both. The manufacturer’s quality organization reviews the FAIR first, verifying all measurements are complete, within tolerance, and properly documented. Once internal review passes, the FAIR is submitted to the customer (or their designated representative) for approval. The customer reviews dimensional data, material certifications, test results, and supporting documentation. They may request clarifications, additional measurements, or process changes. Final customer approval signature on the FAIR authorizes release to production. For some aerospace programs, customers send their quality representatives to witness the FAI in person. The FAIR isn’t valid until both manufacturer and customer have approved and signed it.

Q: How long is a FAIR valid before you need to repeat FAI?

A: AS9100 doesn’t specify an expiration date – FAIRs remain valid indefinitely as long as the product, process, and suppliers remain unchanged. However, FAI must be repeated if: (1) design changes occur affecting form, fit, or function; (2) manufacturing processes change (new equipment, relocated production); (3) supplier changes affect materials or sub-tier processes; (4) production is inactive for 2+ years; or (5) customer specifications require periodic re-validation. Some aerospace customers mandate annual FAI verification even without changes – this ensures continued process capability. The FAIR documentation must be retained for the product’s lifetime plus retention period (typically 10+ years for aerospace) to prove the original first article met requirements.

Q: What happens if the first article fails FAI inspection?

A: The failure triggers root cause analysis and corrective action before production can proceed. Common FAI failures include: dimensions out of tolerance (requires tooling adjustment or drawing revision), component placement errors (requires fixture modification or operator retraining), functional test failures (requires circuit debug or component changes), or material certification issues (requires approved supplier substitution). After corrective action, a new first article is built and inspected – this becomes FAI Attempt #2. The FAIR documents all attempts, failures, corrective actions, and final success. Only when a first article fully passes all inspections does the FAIR get approved for production release. Rushing past FAI failures to “start production anyway” violates AS9100 and will result in major nonconformance findings during audits.

Q: Can you perform FAI on production units instead of dedicated first articles?

A: Yes, with conditions. AS9102 permits using actual production units as first articles, but they must be from the initial production run and fully traceable. The advantage is eliminating separate first article builds (saves time/cost). The disadvantage is that if FAI discovers issues, you may have additional production units built with the same problem before FAI completion. Best practice for complex or high-risk products: build 3-5 dedicated first articles, complete FAI, get approval, then release to production. For simpler products with established processes: build initial production lot, select samples for FAI, complete inspection while production continues (with hold on shipment until FAI approval). Either approach is acceptable under AS9102 as long as the inspected units represent actual production conditions and all documentation requirements are met.