| Form: | S-4 |
| CIK: | 0001021162 | | Company Name: | TRIUMPH GROUP INC | | File Number: | 333-221541 |
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| CIK: | 0001477385 | | Company Name: | Triumph Processing, Inc. | | File Number: | 333-221541-46 |
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| CIK: | 0001722301 | | Company Name: | Triumph Aviation Services - NAAS Division, Inc. | | File Number: | 333-221541-45 |
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| CIK: | 0001722299 | | Company Name: | Triumph Aerostructures - Tulsa, LLC | | File Number: | 333-221541-44 |
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| CIK: | 0001722295 | | Company Name: | Triumph Thermal Systems - Maryland, Inc. | | File Number: | 333-221541-43 |
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| CIK: | 0001722293 | | Company Name: | Triumph Actuation Systems - Yakima, LLC | | File Number: | 333-221541-42 |
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| CIK: | 0001722298 | | Company Name: | MEP NAAS, Inc. | | File Number: | 333-221541-41 |
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| CIK: | 0001477308 | | Company Name: | Triumph Instruments - Burbank, Inc. | | File Number: | 333-221541-40 |
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| CIK: | 0001477389 | | Company Name: | Triumph Structures - Los Angeles, Inc. | | File Number: | 333-221541-39 |
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| CIK: | 0001477386 | | Company Name: | Triumph Brands, Inc. | | File Number: | 333-221541-38 |
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| CIK: | 0001477184 | | Company Name: | Triumph Group Operations, Inc. | | File Number: | 333-221541-37 |
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| CIK: | 0001477188 | | Company Name: | Triumph Group Acquisition Corp. | | File Number: | 333-221541-36 |
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| CIK: | 0001477186 | | Company Name: | Triumph Group Acquisition Holdings, Inc. | | File Number: | 333-221541-35 |
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| CIK: | 0001477387 | | Company Name: | Triumph Fabrications - Fort Worth, Inc. | | File Number: | 333-221541-34 |
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| CIK: | 0001477388 | | Company Name: | Triumph Engineered Solutions, Inc. | | File Number: | 333-221541-33 |
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| CIK: | 0001477183 | | Company Name: | Nu-Tech Brands, Inc. | | File Number: | 333-221541-32 |
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| CIK: | 0001477182 | | Company Name: | Triumph Fabrications - San Diego, Inc. | | File Number: | 333-221541-31 |
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| CIK: | 0001477180 | | Company Name: | Triumph Turbine Services, Inc. | | File Number: | 333-221541-30 |
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| CIK: | 0001477179 | | Company Name: | Triumph Engineering Services, Inc. | | File Number: | 333-221541-29 |
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| CIK: | 0001477178 | | Company Name: | Triumph Actuation Systems - Valencia, Inc. | | File Number: | 333-221541-28 |
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| CIK: | 0001477177 | | Company Name: | Triumph Composite Systems, Inc. | | File Number: | 333-221541-27 |
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| CIK: | 0001477390 | | Company Name: | Triumph Thermal Systems, Inc. | | File Number: | 333-221541-26 |
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| CIK: | 0001477176 | | Company Name: | Triumph Gear Systems, Inc. | | File Number: | 333-221541-25 |
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| CIK: | 0001477391 | | Company Name: | Triumph Aftermarket Services Group, LLC | | File Number: | 333-221541-24 |
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| CIK: | 0001477175 | | Company Name: | Triumph Aerospace Systems Group, LLC | | File Number: | 333-221541-23 |
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| CIK: | 0001477392 | | Company Name: | Triumph Structures - Wichita, Inc. | | File Number: | 333-221541-22 |
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| CIK: | 0001477174 | | Company Name: | Triumph Accessory Services - Grand Prairie, Inc. | | File Number: | 333-221541-21 |
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| CIK: | 0001477309 | | Company Name: | Triumph Investment Holdings, Inc. | | File Number: | 333-221541-20 |
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| CIK: | 0001477394 | | Company Name: | Triumph Aviations Inc. | | File Number: | 333-221541-19 |
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| CIK: | 0001477311 | | Company Name: | Triumph Actuation Systems - Connecticut, LLC | | File Number: | 333-221541-18 |
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| CIK: | 0001477312 | | Company Name: | Triumph Actuation Systems, LLC | | File Number: | 333-221541-17 |
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| CIK: | 0001477408 | | Company Name: | HT Parts, L.L.C. | | File Number: | 333-221541-16 |
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| CIK: | 0001477409 | | Company Name: | Triumph Structures - Long Island, LLC | | File Number: | 333-221541-15 |
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| CIK: | 0001477314 | | Company Name: | Triumph Controls, LLC | | File Number: | 333-221541-14 |
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| CIK: | 0001477316 | | Company Name: | Triumph Insulation Systems, LLC | | File Number: | 333-221541-13 |
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| CIK: | 0001477321 | | Company Name: | Triumph Gear Systems - Macomb, Inc. | | File Number: | 333-221541-12 |
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| CIK: | 0001477412 | | Company Name: | Triumph Structures - Kansas City, Inc. | | File Number: | 333-221541-11 |
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| CIK: | 0001477413 | | Company Name: | Triumph Structures - East Texas, Inc. | | File Number: | 333-221541-10 |
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| CIK: | 0001497086 | | Company Name: | Triumph Aerostructures, LLC | | File Number: | 333-221541-09 |
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| CIK: | 0001497257 | | Company Name: | Triumph Aerostructures Holdings, LLC | | File Number: | 333-221541-08 |
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| CIK: | 0001278885 | | Company Name: | Triumph Structures - Everett, Inc. | | File Number: | 333-221541-07 |
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| CIK: | 0001577518 | | Company Name: | Triumph Engine Control Systems, LLC | | File Number: | 333-221541-06 |
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| CIK: | 0001577517 | | Company Name: | Triumph Aerostructures Real Estate Investment Co., LLC | | File Number: | 333-221541-05 |
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| CIK: | 0001497153 | | Company Name: | Triumph Fabrications - Orangeburg, Inc. | | File Number: | 333-221541-04 |
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| CIK: | 0001278888 | | Company Name: | VAC INDUSTRIES INC | | File Number: | 333-221541-03 |
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| CIK: | 0001477397 | | Company Name: | Triumph Airborne Structures, Inc. | | File Number: | 333-221541-02 |
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| CIK: | 0001615348 | | Company Name: | Triumph Engine Control Holdings, Inc. | | File Number: | 333-221541-01 |
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