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Aero Accessories
John G. Borger founded Aero Accessories in the post-war surge of commercial aviation, eventually anchoring operations in Miramar, Florida.
Aero Accessories
John G. Borger founded Aero Accessories in the post-war surge of commercial aviation, eventually anchoring operations in Miramar, Florida. The firm evolved from a general turbine-component repair station into a Parts Manufacturer Approval (PMA) developer and producer, specializing in components for engine accessories and cabin pressurization systems. Borger remains the named principal on the firm's FAA certifications. Aero Accessories concentrates on rotating seals, static seals, bearing housings, and pressurization valves for widely deployed turbine engines — particularly the Pratt & Whitney Canada PT6 and JT15D platforms, alongside Honeywell TPE331 series and select General Electric CFM56 cabin-air components. The firm competes directly with OEM spare-parts divisions by offering PMA-approved alternatives that airlines and MRO shops use to reduce maintenance cost per flight hour. Known end users include regional carriers in North America and Latin America, flight-training academies operating PT6-powered trainers, and cargo operators running high-cycle turbine equipment. Its parts ship to overhaul facilities in Miami, São Paulo, and Calgary. Aero Accessories operates a single FAA-certified repair station in Miramar combining engineering, CNC manufacturing, testing, and distribution. Headcount is not publicly disclosed. The firm is not known to have taken outside capital; it appears to remain founder-controlled. As of late 2025, Aero Accessories expanded its PMA catalog for CFM56-3 cabin pressure control system valves, addressing a common part-number obsolescence as Boeing 737 Classic fleet support contracts wind down. Aero Accessories holds a structural advantage that most MRO shops do not: it controls the FAA design-approval process for its own parts. That means it can reverse-engineer and certify a discontinued OEM component without waiting for the engine manufacturer to grant a licensing agreement — a bottleneck that can ground aircraft for months. In a supply chain where a single out-of-production carbon seal can sideline a $10 million turboprop, that dual identity as both designer and repair station defines the firm's scarcity.
General information
Firm type
other
Year founded
—
AUM
Undisclosed
Location
Region
North America
Country
United States
City
Miramar
Corporate office
Miramar, FL, United States
Principals
John G. Borger
Founder
Sector focus
Frequently asked questions
What does Aero Accessories manufacture?
Aero Accessories designs and produces PMA-approved replacement parts for turbine engine accessories and cabin pressurization systems. Its catalog focuses on rotating seals, static seals, bearing housings, and pressurization valves for Pratt & Whitney Canada PT6 and JT15D engines, Honeywell TPE331 series, and CFM56 cabin-air components. Every part is certified under the firm's own FAA Parts Manufacturer Approval authority rather than as a licensee of the engine OEM.
Who founded Aero Accessories and is it still independent?
John G. Borger founded the firm and remains the named principal on its FAA certifications. Aero Accessories does not publicly disclose outside investors, family-office backing, or private equity ownership. Industry directories and public records treat the firm as founder-controlled, with no recorded change of control.
On which engine platforms does Aero Accessories have the widest PMA coverage?
The widest coverage is on the Pratt & Whitney Canada PT6 family, the dominant turboprop engine across regional airlines, agricultural aircraft, and trainer fleets. The firm also holds PMAs on the JT15D, Honeywell TPE331, and select CFM56 pneumatic-system components. Aero Accessories tends to target high-time, high-cycle platforms where airlines face the highest OEM spare-parts pricing.
How does Aero Accessories source its design data for PMA parts?
The firm performs its own reverse engineering and test-and-computation analysis to satisfy FAA PMA requirements. This is a higher regulatory bar than repair-station work alone. By holding PMA authority in-house, Aero Accessories can certify a part as airworthy without a licensing agreement from the engine manufacturer — a capability that matters most when OEMs discontinue support for older engine variants.
Does Aero Accessories perform overhaul services or only manufacture parts?
It operates an FAA-certified repair station in Miramar, Florida. The firm both manufactures new PMA parts and overhauls components. However, its structural differentiator is the PMA design and production capability — many pure MRO shops cannot manufacture certified replacement components for the engines they service, while Aero Accessories can.
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