Aircraft Maintenance & Avionics Services

Experienced Service for Your Aircraft in Upland, CA

Keltic Aviation provides aircraft maintenance, repair, avionics, inspection, installation, and upgrade services from our shop in Upland, California. As a family-operated aircraft repair and upgrade shop with 30 years of aviation experience, we bring hands-on knowledge to a wide range of aircraft service needs.


Whether you need to address a maintenance concern, troubleshoot an avionics problem, plan an upgrade, or schedule an aircraft inspection, our team is ready to discuss what your aircraft needs.

We Do It Right. No Shortcuts.

Aircraft Maintenance, Repair & Avionics Services


Explore our five primary service areas to find the right starting point for your aircraft.

Keltic Aviation Aircraft Maintenance & Repair

Aircraft Maintenance & Repair

Aircraft maintenance helps address wear, mechanical concerns, and service needs as they arise. Keltic Aviation provides hands-on aircraft maintenance and repair backed by decades of aviation experience.


We evaluate the work your aircraft requires and provide maintenance or repair based on the issue at hand. Whether you have a known concern or an item identified during an inspection, our team is ready to help.

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Keltic Aviation Avionics Repair & Troubleshooting

Avionics Repair & Troubleshooting

When avionics equipment or systems are not operating as expected, identifying the source of the problem is an important first step.

Keltic Aviation provides avionics repair and troubleshooting with a methodical approach to diagnosing equipment and system issues. 


We focus on understanding what is happening before determining the appropriate repair.

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Keltic Aviation Avionics Installation & Upgrades

Avionics Installation & Upgrades

Planning an avionics installation or upgrade requires careful attention to the equipment, aircraft, and systems involved.


Keltic Aviation provides avionics installation and upgrade services with a focus on workmanship, system integration, and the needs of your aircraft. Talk with our team about the equipment or upgrade you are considering.

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Keltic Aviation Aircraft Inspections & Preventive Maintenance

Aircraft Inspections & Preventive Maintenance

Aircraft inspections and preventive maintenance provide an opportunity to evaluate aircraft condition and identify items that may require attention.


Keltic Aviation performs aircraft inspections and preventive maintenance with a detail-focused approach. When an inspection identifies a maintenance or repair need, our broader aircraft service capabilities allow us to help determine the appropriate next step.

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Keltic Aviation Navigation, Communication & Flight Systems

Navigation, Communication & Flight Systems

Navigation, communication, and related flight systems are important parts of your aircraft. When equipment requires troubleshooting, repair, installation, or an upgrade, experienced avionics service matters.


Keltic Aviation provides service for navigation, communication, and flight systems, helping aircraft owners address existing equipment concerns and plan system improvements.

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One Shop for Aircraft Maintenance & Avionics


Aircraft service needs do not always fit neatly into one category. A problem that appears to involve a single component may require a broader look at the aircraft or systems involved.

Keltic Aviation brings aircraft maintenance and avionics capabilities together under one roof. With 30 years of aviation experience, we can assist with maintenance, repairs, troubleshooting, inspections, installations, and upgrades based on what your aircraft requires.


For aircraft owners, that means having one experienced shop to call for a wide range of service needs.

See Our Aircraft & Avionics Work


Take a closer look at the workmanship behind our services. Our gallery features aircraft maintenance, repairs, avionics installations, upgrades, and other projects performed in our shop.

Aircraft Repair & Avionics in Upland, CA


Keltic Aviation is located at 1749 W 13th St, Hangar 9A, Upland, CA 91786.



From our Upland shop, we provide aircraft maintenance, aviation repair, avionics troubleshooting, installations, upgrades, inspections, and preventive maintenance.

Not sure which service your aircraft needs? Tell us what you are experiencing or the work you are considering. We can discuss your aircraft and determine the appropriate starting point.

Frequently Asked Questions

  • What aircraft services does Keltic Aviation provide?

    Our primary services include aircraft maintenance and repair, avionics repair and troubleshooting, avionics installation and upgrades, aircraft inspections and preventive maintenance, and service for navigation, communication, and flight systems.

  • Does Keltic Aviation provide both aircraft maintenance and avionics services?

    Yes. Keltic Aviation provides both aircraft maintenance and avionics services from our Upland shop, allowing us to assist with a range of maintenance, repair, troubleshooting, inspection, installation, and upgrade needs.

  • Can Keltic Aviation troubleshoot avionics problems?

    Yes. Avionics troubleshooting is one of our primary services. We take a methodical approach to identifying the source of an issue before determining the appropriate repair.

  • Does Keltic Aviation perform avionics installations and upgrades?

    Yes. We provide avionics installation and upgrade services. Contact our team to discuss your aircraft, current equipment, and the installation or upgrade you are considering.

  • Does Keltic Aviation perform aircraft inspections?

    Yes. We provide aircraft inspections and preventive maintenance to evaluate aircraft condition and identify items that may require attention.

  • Where is Keltic Aviation located?

    Keltic Aviation is located at 1749 W 13th St, Hangar 9A, Upland, CA 91786. Our shop is open Monday through Friday from 7:30 a.m. to 4:00 p.m. and closed Saturday and Sunday.

Put 30 Years of Aviation Experience to Work

Whether your aircraft needs maintenance, repair, avionics troubleshooting, an inspection, installation, or an upgrade, talk with Keltic Aviation about the service your aircraft needs.

We Do It Right. No Shortcuts.