AeroParts^®

AeroParts^® Manufacturing & Repair has made its name as a trusted aircraft component repair company by transforming the routine into the remarkable.

Whether it’s nitrogen generating systems (NGS), ozone converters or intricate metal and composite components, the company has diversified its capabilities to serve a broad spectrum of industry demands.

Customer centricity is the heartbeat of its operations. Every repair, every precision-manufactured part, is shaped with a customer-first approach, forging strong, enduring relationships. While repair is its cornerstone, AeroParts has also carved out a niche in custom manufacturing, dedicating 10 percent of its operations to manufacturing parts tailored to exact specifications, working closely with aircraft manufacturers and tier 1 suppliers.

Innovation in Every Fix

What began as a small metal-forming shop over 60 years ago is now a key element of aviation innovation, where repairs are transformed into opportunities to enhance safety, performance, and reliability.

“We’re here to change how the industry thinks about maintenance,” says Paul Eskew III, CEO.

Take AeroParts proprietary AeroCLEAN^® process, for example. While many in the industry consider ozone converters routine, AeroParts views converters as a critical component that should be maintained to a high-performance standard to optimize safety and aircraft cabin air quality. AeroCLEAN was developed nearly 40 years ago, making AeroParts 1st to offer ozone converter repairs. Prior to AeroParts, ozone converters were considered consumable, forcing airlines to purchase expensive new converters every few years. Discarded converters piled up and resulted in high environmental waste.

Since the 1980s, AeroParts AeroCLEAN has safely and effectively removed stubborn contamination that prohibits the catalyst from doing its job. Unlike harsh cleaning processes, AeroCLEAN removes contaminants without compromising the integrity of the catalyst, ensuring optimal functionality, and extending the life of the converter. This kind of forward-thinking science has made AeroParts the preferred supplier for operators who prioritize operational readiness and enhanced performance.

Over time, a converter’s catalyst can be stripped away, due to high cycles and the harsh conditions within the aircraft’s environmental control system (ECS). When a converter can no longer be AeroCLEAN, AeroParts’ proprietary AeroCOAT^® process applies a microscopic layer of catalyst to the existing converter, restoring the converter to like new condition. AeroCOAT is a technology that recycles old worn-out converters, eliminating waste and replacement costs.

Volatile organic compounds (VOCs), like small amounts of engine oil within the ECS, can create ultrafine particles (UFP) and persistent odors in the cabin, compromising system efficiency and flight crew and passenger comfort. AeroParts has developed AeroCOAT VOC^®, which removes ozone, VOCs and UFP, mitigating contamination while reducing odor and pollutants within the cabin. By employing these advanced coatings, AeroParts ensures aircraft systems maintain high operational standards and deliver improved air for passengers and crew.

Leading the Shift toward Environmental Sustainability

“It’s not enough to solve today’s problems; we have to anticipate tomorrow’s challenges,” explains Dr. Richard Fox, AeroParts’ Environment Control Solutions Manager.

As the aviation industry faces increasing pressure to reduce its environmental impact, AeroParts is driving change through sustainable innovations that boost aircraft performance while maximizing environmental sustainability. The company stands at the intersection of technical excellence and environmental responsibility, collaborating with industry leaders to solve aviation’s sustainability challenges.

Its efforts are particularly notable in ozone and VOC reduction, where its advanced technologies target harmful emissions that threaten both aircraft systems and the cabin environment. Working along with key regulatory bodies and standards committees, like the SAE AC-9 and E-31 committees, the FAA and EASA, AeroParts has played an instrumental role in shaping the industry to reduce contaminants in cabin air and assist operators to assure compliance and provide a cleaner flight environment.

Leading the ozone converter technology space for many decades, AeroParts VOC upgrade program takes older converters and brings them up to today’s standards. This ensures even legacy aircraft can meet modern sustainability benchmarks, improving cabin air quality while reducing repair costs and excessive waste.

Another sustainable approach is AeroParts innovation in fuel tank inerting systems under ATA Chapter 47. These systems use hot engine bleed air to generate nitrogen, displacing oxygen in fuel tanks to enhance safety.

Guided by Dr. Fox’s vision, every solution AeroParts develops plays a pivotal role in advancing a cleaner, safer, and a more sustainable aviation industry. His influence extends beyond AeroParts, Dr. Fox chairs multiple standards committees, shaping the future of environmental systems across the sector. His industry-wide reputation serves as the foundation of AeroParts’ environmental innovations, ensuring each product not only meets but surpasses the highest regulatory requirements.

Addressing Premature Failures

Even the smallest failures can lead to costly disruptions. For operators relying on the Nitrogen Generating System (NGS), one of the most pressing issues is the premature failure of Air Separation Modules (ASMs) — a critical, high-cost component within the NGS. AeroParts analyzed ASMs removed from aircraft to understand and quantify the root causes for early failures. Many contributing issues were identified that required a system-wide approach to resolve poor ASM reliability.

Like the ECS, the NGS uses an ozone converter to remove harmful ozone that can destroy the delicate ASM fibers. Operators direct theretheir NGS converters to AeroParts for AeroCOAT, resulting in “like new” performance each time the NGS converter is serviced. Using a high performing ozone converter in the hot air stream is the most effective way to prevent harmful ozone from oxidizing delicate ASM fibers.

AeroParts receives failed NGS components for repair, enabling them to quickly identify reliability trends. They notice a high number of ASM failures coming from the B737s due to fuel contamination. The B737 NGS incorporates two flapper-style check valves between the ASM and the fuel tank to prevent fuel from entering the NGS when the NGS is switched off. Working with several large operators, AeroParts obtained a large number of used check valves and quickly determined that the worn valves could be redesigned to improve their performance.

AeroParts redesigned the check valve’s swing assembly, with a focus on increasing the crack pressure and strengthening mechanical features. Endurance testing showed that the improved check valve held up 5 time longer than a new unmodified valve. Hundreds of upgraded valves have been installed by major airlines, and the results are clear. The improved swing assembly has eliminated premature ASM failures due to fuel contamination. AeroParts improved check valves can be modified quickly and for a small fee, resulting in a rapid ROI for airlines. Operators are protecting their critical ASMs and avoiding millions in ASM replacement costs with a positive impact on the environment, all because of innovations created by AeroParts.

Excessive heat exposure to ASMs that use heat sensitive fibers, like those used on Airbus aircraft, is another major driver for poor ASM reliability. Compounding these challenges is dirty air, which causes reduced performance of the ASM fibers.

Armed with these findings, AeroParts developed solutions to bolster the durability and performance of the NGS system, reducing premature ASM failures and significantly extending the lifespan of critical NGS components.

Redefining Reliability through ASM Longevity

For years, AeroParts worked relentlessly on solutions to extend ASM reliability. It has developed NitroPURE^® technology that transforms worn-out ASMs into high-performing assets.

“We developed NitroPURE^® to address ASM design issues resulting from our ASM reliability analysis. NitroPURE’s stateof-the-art fibers are made of heat resistant polymers that are cross-linked, making the fiber perfect for the harsh operating conditions of commercial aircraft. NitroPURE technology specifically addresses the two major issues associated with shortened ASM life – high heat and fuel contamination,” explains Larry Britt, AeroParts Business Development Manager.

AeroParts’ results speak for themselves. NitroPURE ASM technology has been successfully deployed across Boeing and Airbus fleets worldwide and has proven to hold up to high temperature environments and severe fuel contamination events. Where traditional membranes might disintegrate when exposed to fuel, NitroPURE ASMs remains unscathed, delivering cost-effective solutions that keep planes flying.

A Reputation for Precision

“We’ve built a reputation on being small, fast and deeply technical,” says Paul Eskew III, AeroParts CEO. “Our strength lies in taking worn-out parts, understanding why they failed and developing solutions that repair and improve the performance with the latest technologies.”

In cases where most would scrap a unit, AeroParts develops options that extend the life of components, eliminating the need for expensive replacements. This approach aligns with a more sustainable operational model that reduces waste while keeping aircraft in peak condition.

This dedication to repairing over replacing makes AeroParts a partner committed to cutting downtime, lowering costs, and ensuring operational efficiency. Its forward-thinking mentality solidifies its standing as an industry leader—always pushing the boundaries of safety, performance, and sustainability in aircraft operations.