maintenance | repair | overhaul 

Why Choose Ozark Aeroworks? 


We are a T53 engine maintenance, repair, and overhaul facility with the knowledge, capability, and drive to provide customers with the quality they expect, the price they deserve, and the fast, effective turn times they demand. 



Ozark Aeroworks, LLC (OAW) is a veteran-owned small business with big experience. After more than 40 years of involvement in the T53 series engine maintenance, repair, and overhaul (MRO) industry, OAW’s CEO, Ken Essary, decided to start his own shop--located in his hometown of Springfield, Missouri.


Ken isn't the only highly experienced person at OAW. Our team of 24 technical staff members has clocked almost 600 (591 to be precise) years of combined aviation maintenance experience!

In addition to our extensive experience, OAW is an FAA Part 145 Certificated Repair Station and a Honeywell Authorized T53 Engine Service Center. We serve multiple industry segments including commercial and military clients. 

In October 2014, OAW partnered with Mike O’Reilly, Owner/Chairman of Eagle, Ltd. Eagle has been an industry leader in the helicopter MRO and leasing business since 1973. This synergy made the new partnership a perfect fit. Eagle has since relocated its T53 engine MRO tooling, equipment, and test cell to the OAW facility—further enhancing and expanding OAW’s capabilities, offering customers a dynamic duo built on exceptional quality, extensive capabilities, and strong reputations. 

At the beginning of 2017, OAW expanded its reach to include machining and welding capabilities, along with becoming a Triumph Engine Control Systems approved service center. These features, in addition to our already proven NDT/NDI lab, offer customers even more in-house production expertise. 

We know what it takes to be a premier T53 engine MRO provider. Our customers are our priority, and we deliver the benchmark service they deserve. Ozark Aeroworks prides itself on being a facility with complete and extensive capabilities locally, as well as providing field service worldwide. We look forward to partnering with you to meet your T53 series engine needs. 


To view our certifications and read published articles featuring Ozark Aeroworks, click the following links: 

FAA Part 145 Repair Station

FAA Part 145 Repair Station

Honeywell Cert

EASA Certificated Repair Station

Test Cell Certification

Honeywell Correlated Test Cell Certification

Triumph Correlation Certification

Triumph Engine Control Systems Correlation Certification for TA-7 Fuel Controls and PTG-3 Series O/S Governors

Triumph AMC Certificaiton

Triumph Engine Control Systems AMC Certification for TA-7 Fuel Controls and PTG-3 Series O/S Governors

Drug and Alcohol Policy

Drug and Alcohol Policy Certification



Ken Essary

President/CEO/Accountable Manager


Ozark Aeroworks delivers the results you expect. Contact us today for any of the following services: 
T53 Series Engine Overhaul
T53 Series Engine Overhaul

T53-L-13B; T53-L-703; T5313B; T5317A, A-1, B, BCV; T53-L-701 (for marine/industrial use)

Fuel Control + Governor
Fuel Control + Governor

We are a Triumph Engine Control Systems-Approved Fuel Control Unit and Governor Maintenance, Repair, and Overhaul Facility

Parts Support
Parts Support

T53 engine spare parts requirements

Fixed Price Maintenance Programs
Fixed Price Maintenance Programs

TBO warranty plan; flat rate exchanges

In-House Services
In-House Services

Abrasive blasting & aqueous cleaning; NDT; organized kitting system; oil and fuel functional testing; dynamic balancing; specialized tooling; test cell; prep & paint

Field Service
Field Service

Hot section inspections; unscheduled maintenance; on-site troubleshooting support; on-site customer training; support worldwide customer base; scheduled and unscheduled maintenance

Non-Destructive Testing
Non-Destructive Testing

Click here to find out what our in-house NDT lab has to offer!

Test Cell
Test Cell

State-of-the-art; proven, having tested thousands of engines; on-site, improving quality, reducing turnaround times, and lowering costs

Welding + Machine Shop
Welding + Machine Shop

Ozark Aeroworks now offers on-site welding and machining!

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           Address: 452 S Union Ave. Suite B

           Springfield, MO 65802

           Phone: 855.737.7752

           Email: ken.essary@ozarkaero.com

Shane Patterson | Director of Technical Services

   Phone: 417.849.6740

      Email: shane.patterson@ozarkaero.com

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