Aircraft Engine & Parts Mfrs NAICS 336412, 336413
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Industry Summary
The 296 aircraft engine and parts manufacturers in the US produce civilian and military aircraft engines, engine parts and accessories, other aircraft parts and subassemblies, and auxiliary equipment for aircraft. They may also provide design and development services for new engines and parts, as well as support and repair services for existing products.
Government Regulations and Policies
The aircraft industry is highly regulated by the Federal Aviation Administration in the United States, and equivalent regulatory agencies in other countries.
Availability of Raw Materials
Many expensive and sometimes rare specialty metals are used in the manufacture of aircraft engines and parts.
Recent Developments
Sep 25, 2025 - Delta Replacing Engines Leaking Fumes
- Delta is retrofitting more than 300 Airbus A320-series aircraft by replacing auxiliary power units (APUs) after a surge in “fume events,” where oil leaks or seal failures release toxic vapors into airplane cabins. The issue highlights design and maintenance challenges for APU manufacturers, pressuring suppliers such as Honeywell and Pratt & Whitney to accelerate fixes and upgrades. For the aircraft manufacturing industry, the problem raises regulatory and reputational risks, with airlines demanding higher safety standards and more reliable systems. It also adds costs across the supply chain as manufacturers face redesigns, potential litigation, and stricter oversight. Longer term, the industry may need to adopt new engineering approaches to air and ventilation systems to reassure operators and passengers, shaping how future aircraft are built.
- New orders for non-defense aircraft and parts rose 27.3% year over year in February 2025 - per the US Census Bureau - a slight recovery, but orders are still down 9.5% from January 2025. Seesawing new orders are due to a late 2024 strike by Boeing factory workers and slower orders from rival Airbus. The Boeing work stoppage halted production of the company’s 737 MAX airliner, as well as on wide-body 767s and 777s. Along with safety concerns after a string of high-profile in-flight aircraft mishaps, issues at Boeing cascaded down into the aircraft parts industry as a whole with shrinking commercial airliner demand in late 2024 and early 2025. On top of all that, Boeing is concerned that Trump’s tariffs will hamper parts availability from its suppliers and increase its costs at a tenuous time.
- Airlines experienced strong demand for flights headed into the 2025 summer travel season, but that good news is also shining a light on the shortage of available commercial jets due to production delays at the world’s largest airplane manufacturers - Boeing and Airbus. Both companies have fallen short of their deadlines for delivery of new aircraft to customers, resulting in industry-wide capacity boosts of only 1-3% for the summer season, according to EasyJet CEO Kenton Jarvis. Europe’s Airbus delivered 56 jets in April 2025, an 8% drop year over year. Boeing, which has been consumed with safety crises and production problems for several years, is slowly improving this year and delivered 45 jets in April, which doubled from March. However, airplane delivery totals for both companies in Q1 indicate they will have trouble meeting their targets for the year, per aviation analytics firm Cirium.
- US manufacturing activity contracted in December 2024, marking the ninth consecutive month of contraction for the Manufacturing PMI, according to the Institute for Supply Management’s Manufacturing ISM Report on Business. The Manufacturing PMI registered 49.5% in December, up 0.9 percentage points from the 48.4% recorded in November. A reading above 50% indicates manufacturing expansion. Transportation equipment was one of the seven industries that reported contraction in December, along with Textile Mills; Fabricated Metal Products; Printing & Related Support Activities; Machinery; Chemical Products; and Nonmetallic Mineral Products. Seven manufacturing industries reported growth in December, including Primary Metals; Electrical Equipment, Appliances & Components; Wood Products; Furniture & Related Products; Paper Products; Miscellaneous Manufacturing; and Plastics & Rubber Products.
Industry Revenue
Aircraft Engine & Parts Mfrs
Industry Structure
Industry size & Structure
The average aircraft engine and parts manufacturer employs 230 workers and generates $147 million in annual revenue.
- The industry includes about 295 firms, generating about $43.5 billion in annual sales and employing more than 68,350 workers.
- The aircraft engine and parts industry is a high technology-driven manufacturing business, characterized by a few large engine and aircraft manufacturers working in close collaboration with many smaller, highly specialized engine subassembly and parts manufacturers.
- About 70% of the industry's establishments have 100 or fewer employees, yet the largest manufacturers employ over 80% of the total industry workforce.
- The largest engine manufacturers, in order of worldwide market share, are GE Aviation, Rolls-Royce, and Pratt-Whitney.
- Most engine and aircraft parts manufacturers sell to civilian, commercial and defense aircraft manufacturers, but usually the end-user customer, such as a commercial airline, dictates which competitive engine and subsystems will be installed in their aircraft.
- Large commercial aircraft manufacturing customers include Boeing, Airbus, Bombardier, and Embraer. The largest general aviation manufacturing customers are Cessna, Cirrus Aircraft, Diamond Aircraft, Mooney, and Piper.
- The largest numbers of industry-related manufacturers are in California, Connecticut, Florida, Texas, Ohio, Michigan, and Arizona.
Industry Forecast
Industry Forecast
Aircraft Engine & Parts Mfrs Industry Growth
Source: Vertical IQ and Inforum
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