What does 'unlimited' class rating mean?

Our unlimited class rating means we can add new part numbers to our repair capabilities within the three accessory classes without being restricted to a pre-defined list. This gives us flexibility to support customer fleet requirements as they evolve.

How often are your certifications audited?

We undergo FAA surveillance inspections typically 2-3 times annually, EASA annual audits, periodic OEM supplier quality assessments from Lockheed Martin and Bombardier, customer audits, and monthly internal audits to proactively identify improvement opportunities.

What quality management standards do you follow?

We're certified to ISO 9001 aerospace standards, which requires documented processes for all key activities, regular internal audits, management review of quality metrics, and ongoing verification that our quality system remains effective.

Can you service European-registered aircraft accessories with your EASA approval?

Yes. Our EASA Part 145 approval (145.4452) authorizes us to perform certified aircraft accessory overhaul services on European-registered aircraft. Our EASA scope maintains equivalency with our FAA scope for seamless international service.

Aviation Certifications - FAA/EASA/CAA Part 145 Approved

Certified Excellence, Global Recognition

Four Star Accessory Overhaul maintains comprehensive regulatory certifications, authorizing aircraft accessory repair across commercial, military, and business aviation sectors worldwide. As an FAA-certified MRO and EASA Part 145–approved facility, with Accessory Classes I, II, III (Unlimited) designation, we deliver certified quality across more than 20,000 accessory capabilities.

UK CIVIL AVIATION AUTHORITY – PART-145 APPROVAL

We take pride in earning the trust of the UK Civil Aviation Authority, holding Approval Reference UK.145.50812 as a Part-145 maintenance organization. Certified under the bilateral agreement between the UK and the USA, this approval reinforces our continued commitment to excellence.

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We take pride in earning the trust of the UK Civil Aviation Authority, holding Approval Reference UK.145.50812 as a Part-145 maintenance organization. Certified under the bilateral agreement between the UK and the USA, this approval reinforces our continued commitment to excellence.

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FAA REPAIR STATION CERTIFICATE

At Four Star, we hold FAA repair station certificate number EP3R483L. The certificate is rated for Accessory Classes I, II, and III (Unlimited), and non-destructive inspections. The certificate was originally issued in April 1988, and we are proud to have held it since that date.

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At Four Star, we hold FAA repair station certificate number EP3R483L. The certificate is rated for Accessory Classes I, II, and III (Unlimited), and non-destructive inspections. The certificate was originally issued in April 1988, and we are proud to have held it since that date.

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EASA PART-145 APPROVAL EASA.145.4452

The European Aviation Safety Agency has approved Four Star as a Part-145 maintenance organization under EASA Approval Number EASA.145.4452. The approval is based on the scope of services approved under FAA Repair Station Certificate EP3R483L.

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The European Aviation Safety Agency has approved Four Star as a Part-145 maintenance organization under EASA Approval Number EASA.145.4452. The approval is based on the scope of services approved under FAA Repair Station Certificate EP3R483L.

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LOCKHEED MARTIN APPROVED REPAIR CENTER

Lockheed Martin has approved Four Star as an Approved Repair Center under its Hologram Program. Those holding this badge of quality are C-130 (B-H) component repair and overhaul facilities whose quality systems have been inspected and approved following stringent audits by Lockheed Martin Quality Assurance.

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Lockheed Martin has approved Four Star as an Approved Repair Center under its Hologram Program. Those holding this badge of quality are C-130 (B-H) component repair and overhaul facilities whose quality systems have been inspected and approved following stringent audits by Lockheed Martin Quality Assurance.

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FAA Certification

Four Star operates as an FAA 145.5082 repair station, providing FAA certified accessory repair services throughout North America. Our FAA approved aircraft accessory station authorization covers all three accessory classes without part number limitations, giving us the flexibility to add new capabilities as customer requirements evolve.

The FAA-certified MRO designation requires us to maintain documented procedures for every repair task, employ appropriately trained and certified technicians, use calibrated tooling and test equipment, and maintain complete traceability from component receipt through final shipment. Our operations are subject to regular FAA surveillance inspections that verify ongoing compliance with Part 145 regulations.

Our aircraft accessory testing & certification processes follow FAA-approved technical data, whether from OEM manuals, Component Maintenance Manuals (CMMs), or engineering instructions. This ensures that repairs performed on hydraulic systems, power generation units, fuel accessories, or any other accessory type meet airworthiness standards.

Certified For Excellence,

Proven For Performance.

Certified Excellence, Global Recognition

Regulatory Certifications

FAA Certification

EASA Certification

Additional Regulatory Approvals

Frequently Asked Questions

Certified For Excellence, Proven For Performance.

Certified Excellence, Global Recognition

Regulatory Certifications

FAA Certification

EASA Certification

Additional Regulatory Approvals

Frequently Asked Questions

01What does 'unlimited' class rating mean?

02How often are your certifications audited?

03What quality management standards do you follow?

04Can you service European-registered aircraft accessories with your EASA approval?

Certified For Excellence,

Proven For Performance.