- Air & Space Rides and Adventures - Air Combat USA
 - Fullerton - Fly real combat aircraft in air combat missions. - Aviation Distributors (ADI)
- Lake Forest - Aircraft parts redistributor and inventory management service provider.
- Christiecbs.com
- Lake Forest - Distributes Christie aircraft battery maintenance automation products, including chargers, analyzers, battery and cell monitoring instruments, and a Windows-based battery maintenance controller.
- DABICO, Inc.
- Costa Mesa - Specialised in aircraft ground support equipment(GSE).
- J.C. Carter Company
- Costa Mesa - Designs and manufactures aircraft fuel system components, ground fueling equipment and marine industrial pumps.
- Ken Brock Manufacturing
- Stanton - Manufacturing gyroplane pre-fabricated sub-kits, and home-built aircraft components.
- Ocean Air
- Yorba Linda - Supplier of commercial aircraft products for the aviation aftermarket. Specialises in airborne communication, navigation, and instrumentation systems.
- Orange County Flight Center
- Santa Ana - Includes flight training, ground school, and rentals.
- Pacific Consolidated Industries
- Santa Ana - Specialises in portable oxygen- and nitrogen-generating plants and related accessory equipment.
- Pacific Electronic Enterprises
- Huntington Beach - Providing repair of military avionic systems, radar, communication and microwave.
- PilotAge
- Costa Mesa - Trade magazine for Southern California aviators.
- Quade, Paul
- Santa Ana - Certified flight instructor based out of John Wayne Airport.
- Redhill Aviation
- Costa Mesa - Offering aircraft parts and pilot supplies.
- Sunrise Aviation
- Santa Ana - Offering complete pilot training, aerobatics instruction, and aircraft rentals for both U.S. and foreign students.
- US Technical Corporation
- Anaheim - Provides a turn-key aviation products, engineering and FAA/JAA certification service to airlines, aircraft manufacturers and equipment OEM.
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