NAICS 336413 Quarterly Industry Report
Other Aircraft Parts and Auxiliary Equipment Manufacturing
Comprehensive industry research for valuation professionals, business owners, buyers, and lenders
NAICS Code: 336413Sector: 33Updated: Q1 2026
About This Report
This Fair Market Value industry report for NAICS 336413 draws on verified data from the U.S. Census Bureau[5], Bureau of Labor Statistics[6], and the Small Business Administration[7]. Our research team compiles establishment counts, employment data, and SBA eligibility criteria specific to other aircraft parts and auxiliary equipment manufacturing. Reports are updated quarterly to reflect new Census releases and regulatory changes.
Industry Snapshot
Key metrics for the other aircraft parts and auxiliary equipment manufacturing industry.
Industry Definition & Overview
Other Aircraft Parts and Auxiliary Equipment Manufacturing (NAICS 336413) encompasses establishments primarily engaged in manufacturing aircraft parts and auxiliary equipment not classified under airframe, engine, or guided missile codes. Products include landing gear assemblies, hydraulic actuators and flight control systems, fuel system components, environmental control systems (ECS), auxiliary power unit installations, aircraft seating, cargo handling systems, and a broad range of structural and mechanical subassemblies. The U.S. Census Bureau[5] classifies this industry under aerospace product and parts manufacturing.
Roughly 1,480 active businesses employ an estimated 78,400 workers in this industry. Production ranges from large Tier 1 suppliers manufacturing complete landing gear systems and flight control actuators to small machine shops producing precision-machined fittings, brackets, and detail parts as Tier 3 and Tier 4 suppliers. The aftermarket segment generates steady revenue through PMA replacement parts, DER repairs, and component overhaul services under FAA repair station certification.
Manufacturing processes include precision CNC machining of aluminum, titanium, and steel alloys; composite layup and autoclave curing for structural panels and fairings; hydraulic component assembly and testing; electrical wire bundle fabrication; and sheet metal forming for ducting and enclosures. All production must comply with FAA Production Approval requirements, AS9100 quality systems, and customer-specific manufacturing process specifications. Traceability documentation follows each part from raw material certification through final inspection. Material review board procedures govern disposition of nonconforming parts, and special process approvals (Nadcap accreditation) cover heat treatment, chemical processing, nondestructive testing, and welding operations throughout the supply chain.
What's Included in This Industry
- Landing gear assembly manufacturing
- Hydraulic actuator and valve production
- Aircraft fuel system component manufacturing
- Environmental control system production
- Aircraft seating manufacturing
- Cargo handling and loading system production
- Flight control surface actuator manufacturing
- Aircraft structural subassembly production
- Wire bundle and electrical panel fabrication
- Aircraft interior component manufacturing
NAICS Classification Hierarchy
| Level | Description | Code |
|---|---|---|
| Subsector | Transportation Equipment Manufacturing | 336 |
| Industry Group | Aerospace Product and Parts Manufacturing | 3364 |
| NAICS Industry | Aerospace Product and Parts Manufacturing | 33641 |
| National Industry | Other Aircraft Parts and Auxiliary Equipment Manufacturing | 336413 |
Related NAICS Codes
| Code | Description | Relationship |
|---|---|---|
| 336411 | Aircraft Manufacturing | Manufactures complete aircraft and airframe structures rather than the auxiliary equipment, landing gear, and subassembly components produced for installation on those airframes |
| 336412 | Aircraft Engine and Engine Parts Manufacturing | Produces aircraft engines and engine-specific parts classified under a dedicated propulsion code rather than the non-engine aircraft parts manufactured in this classification |
| 336414 | Guided Missile and Space Vehicle Manufacturing | Manufactures guided missiles and space vehicles as complete systems rather than the aircraft-specific auxiliary parts and equipment produced for conventional aviation platforms |
| 336419 | Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing | Produces other guided missile and space vehicle parts classified under defense and space manufacturing rather than the commercial and military aircraft parts produced here |
| 332912 | Fluid Power Valve and Hose Fitting Manufacturing | Manufactures fluid power valves and actuators for general industrial applications rather than the aviation-specific hydraulic components produced to FAA certification standards |
| 334511 | Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing | Produces search and navigation instruments including avionics classified under electronic instrument manufacturing rather than the mechanical and structural aircraft parts produced here |
Geographic Concentration
Top states by share of national establishments.
| # | State | % Est. | Total Est. |
|---|---|---|---|
| 1 | California | 20.4% | 182 |
| 2 | Washington | 9.2% | 82 |
| 3 | Florida | 9.1% | 81 |
| 4 | Kansas | 7.0% | 63 |
| 5 | Texas | 6.6% | 59 |
| 6 | Connecticut | 4.0% | 36 |
| 7 | Arizona | 3.4% | 30 |
| 8 | New York | 3.1% | 28 |
| 9 | Ohio | 2.7% | 24 |
| 10 | Missouri | 2.4% | 21 |
% Of Establishments
0%
20%
Source: County Business Patterns, U.S. Census Bureau[3]
SBA Lending Summary
88
Total SBA Loans
$103.2M
Total Loan Volume
$1.2M
Average Loan Size
13 yrs
Average Loan Term
9.04%
Average Interest Rate
1,120
Jobs Supported
Source: SBA 7(a) Program Data, U.S. Small Business Administration — FY 2025[4]
Key Insight: The SBA[7] sets the size standard for NAICS 336413 at 1,250 employees. Firms below this threshold qualify for small business set-aside contracts and SBA-backed lending programs. Federal procurement includes aircraft hydraulic components, landing gear parts, and ECS units for military aircraft maintenance and new production programs. The SBA's contracting programs[8] support manufacturers pursuing Air Force, Navy, and Defense Logistics Agency aircraft parts contracts. Eligible businesses can access SBA 7(a) loans[9] for working capital, equipment, and acquisition financing, while 504 loans[10] support major fixed-asset purchases including real estate and heavy machinery.
Top SBA Lenders
| # | Lender | Loans | Volume | Avg Loan |
|---|---|---|---|---|
| 1 | First Commonwealth Bank | 16 | $38.3M | $2.4M |
| 2 | City National Bank | 8 | $27.3M | $3.4M |
| 3 | Capital One, National Association | 8 | $9.1M | $1.1M |
| 4 | Equity Bank | 8 | $8.0M | $1.0M |
| 4 | GBC International Bank | 8 | $8.0M | $1.0M |
Frequently Asked Questions
Common questions about this industry.
What types of businesses are classified under NAICS 336413?
Manufacturers of aircraft parts and auxiliary equipment not classified under airframe or engine codes belong here. Products include landing gear, hydraulic systems, fuel components, environmental controls, aircraft seating, and cargo handling systems per the Census Bureau[5] classification.
How is the other aircraft parts industry structured?
Roughly 1,480 businesses employ an estimated 78,400 workers per Census data[11]. Large Tier 1 suppliers produce complete landing gear and flight control systems while thousands of smaller firms machine precision detail parts as Tier 3 and Tier 4 suppliers in the aviation supply chain.
What is the SBA size standard for NAICS 336413?
The SBA[7] sets the threshold at 1,250 employees. Businesses with fewer than 1,250 average employees qualify as small for federal contracting preferences and SBA-backed financing programs including 7(a) and 504 loans.
What NAICS codes are related to other aircraft parts manufacturing?
Related codes include 336411 (Aircraft), 336412 (Aircraft Engines), 336414 (Guided Missiles), 336419 (Space Vehicle Parts), 332912 (Fluid Power Valves), and 334511 (Navigation Instruments). Each covers either complete aircraft, engines, defense systems, or electronic instruments distinct from mechanical aircraft parts.
What industries interact with aircraft parts manufacturers?
Aircraft assemblers, commercial airlines, MRO facilities, engine manufacturers, and specialty foundries interact most directly. New aircraft production drives OEM demand while airline fleet maintenance and military sustainment programs generate aftermarket revenue through component overhaul and replacement parts procurement.
What activities are included in NAICS 336413?
Activities include manufacturing and assembling landing gear struts and actuators, producing hydraulic flight control components, fabricating aircraft fuel system assemblies, manufacturing environmental control system ducting and components, building aircraft seats and interior panels, assembling cargo handling systems, and performing component overhaul under FAA repair station certification.
Can aircraft parts manufacturers qualify for SBA loans?
Yes, firms below 1,250 employees qualify for SBA lending programs[8] including 7(a) and 504 loans. Five-axis CNC machining centers, composite autoclaves, hydraulic test stands, and Nadcap-accredited special process equipment represent capital investments suited to SBA 504 equipment financing.
Where are other aircraft parts manufacturers concentrated?
Production concentrates near major aircraft assembly operations in Washington, Texas, Kansas, and Connecticut. Southern California hosts a dense cluster of precision machine shops and specialty parts producers serving both commercial and military aviation programs. Smaller clusters exist in Florida, Arizona, and North Carolina near military aviation facilities. Proximity to prime contractors and access to skilled aerospace machinists influence location decisions across the supply chain.
Sources & References
Government datasets and editorial sources used in this report.
- [1]U.S. Bureau of Labor Statistics, Quarterly Census of Employment and Wages bls.gov
- [2]U.S. Census Bureau, Economic Census census.gov
- [3]U.S. Census Bureau, County Business Patterns census.gov
- [4]U.S. Small Business Administration, SBA 7(a) Loan Program Data data.sba.gov
- [5]U.S. Census Bureau census.gov
- [6]Bureau of Labor Statistics bls.gov
- [7]Small Business Administration sba.gov
- [8]SBA's contracting programs sba.gov
- [9]SBA 7(a) loans sba.gov
- [10]504 loans sba.gov
- [11]Census data naicslist.com
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