# STC SR00143DE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Midwest Aerospace TC LLC, United States
- Description: Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003
- Applied: November 8, 1993
- Status date: February 8, 2023
- Product: Aircraft, Rotorcraft
- Data sheets: [TCDS R00007DE](https://openairdocs.org/tcds/R00007DE), [TCDS H2NM](https://openairdocs.org/tcds/H2NM), [TCDS R00002RC](https://openairdocs.org/tcds/R00002RC), [TCDS H15NM](https://openairdocs.org/tcds/H15NM), [TCDS R00005SE](https://openairdocs.org/tcds/R00005SE), [TCDS H7SO](https://openairdocs.org/tcds/H7SO), [TCDS H13WE](https://openairdocs.org/tcds/H13WE), [TCDS H6SO](https://openairdocs.org/tcds/H6SO), [TCDS H7NE](https://openairdocs.org/tcds/H7NE)
- Certificate PDF: https://openairdocs.org/files/sha256/63/9c/639c8cbd5bec3cf91b0049afa8e3ce92a432c68bffcf4b1c5993bb5ff6c992dd
- Approved model list and other attachments: [SR00143DE_AML.pdf](https://openairdocs.org/files/sha256/97/5f/975fe5a5cdd85af85ab089ff4f91f0231088147f76ff30557418b257332c72cc)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID153789842220230605153338.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR00143DE

## ADs that name it (0)

None.

## Approved models (9)

- Arrow Falcon Exporters Inc. UH-1H ([TCDS R00007DE](https://openairdocs.org/tcds/R00007DE))
- California Department of Forestry UH-1F ([TCDS H2NM](https://openairdocs.org/tcds/H2NM))
- Global Helicopter Technology Inc. UH-1H ([TCDS R00002RC](https://openairdocs.org/tcds/R00002RC))
- Hagglund Helicopters LLC UH-1H ([TCDS H15NM](https://openairdocs.org/tcds/H15NM))
- Northwest Rotorcraft LLC UH-1H ([TCDS R00005SE](https://openairdocs.org/tcds/R00005SE))
- Overseas Aircraft Support Inc UH-1H ([TCDS H7SO](https://openairdocs.org/tcds/H7SO))
- Rotorcraft Development Corporation UH-1H ([TCDS H13WE](https://openairdocs.org/tcds/H13WE))
- Southwest Florida Aviation International UH-1H ([TCDS H6SO](https://openairdocs.org/tcds/H6SO))
- Tamarack Helicopters Inc. UH-1F ([TCDS H7NE](https://openairdocs.org/tcds/H7NE))

## What the certificate says

Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record.

(See Continuation Sheet Page 3 of 3 Pages) FAA Form 8110-2 (03/21) SR00143DE Midwest Aerospace TC LLC 9465 Joliet Street St. John, IN 46373 7 the Civil Air Regulations * * * See attached FAA Approved Model List (AML) No. SR00143DE for list of approved rotorcraft models and applicable airworthiness regulations Installation of an upgraded 42 degree Tail Rotor gearbox, P/N 212-040-003 in accordance with Garlick Helicopters, Inc. Drawing GUI-94200, Revision A, dated August 11, 1994, or later FAA approved revisions.

November 8, 1993 July 10, 2007; February 4, 2009; February 8, 2023 February 1, 1995 January 26, 2012 for Manager, West Certification Branch

1. Compatibility of this design change with previously approved modifications must be determined by the installers.

2. If the holder agrees to permit another person to use this certificate, the holder shall give the other person written evidence of that permission.

3. A copy of this Certificate, Eligibility List, Flight Manual Supplement, and Maintenance Manual Supplement must be maintained as part of the permanent records of the aircraft.

FAA Form 8110-2 (03/21) SR00143DE

End FAA Form 8110-2 (03/21) Limitations and Conditions Continued:

SR00143DE

4. Garlick Helicopters Rotorcraft Maintenance Manual Supplement for the UH-1H or UH-1F model is required for this STC. Airworthiness Limitations FAA approved February 1, 1995, or later FAA approved of revisions are required.

5. Aircraft modified by this STC are limited for use per 14 CFR 21.93(b)(4) to:

a) Agricultural aircraft operations as defined in 14 CFR 137.3, effective January 1, 1996, and for dispensing of Fire Fighting Materials.

b) External Load Operations. Carrying of External Loads as defined in 14 CFR 133.1(b) effective December 20, 1976.

### SR00143DE_AML.pdf

FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR00143DE FOR Conversion of UH-1H and UH-1F Helicopters to upgraded 42º Gearbox

Helicopters eligible for civil certification under one of the following type certificates are eligible for conversion to install the upgraded 42º Gearbox under this Supplemental Type Certificate.

ISSUE DATE: February 1, 1995 Page 1 of 1

**ITEM AIRCRAFT / ROTORCRAFT MAKE ROTORCRAFT MODEL ORIGINAL**

**TC NUMBER**

1. Rotorcraft Development Corporation UH-1H H13WE

2. Southwest Florida Aviation UH-1H H6SO

3. California Department of Forestry UH-1F H2NM

4. Ranger Helicopter Services UH-1F H7NE

5. Overseas Aircraft Support, Inc. UH-1H H7SO

6. Hagglund Helicopters, LLC UH-1H H15NM

7. Global Helicopter Technology, Inc. UH-1H R00002RC

8. Northwest Rotorcraft, LLC UH-1H R00005RC

9. Arrow Falcon Exporters, Inc UH-1H R00007RC

Installation to be per Garlick Helicopters, Inc. Drawing Number GHI-94200

FAA Approved:

for Manager, West Certification Branch AMENDED: March 3, 2009; November 20, 2007; January 26, 2012 REISSUED: July 10, 2007; February 4, 2009; February 8, 2023

## Every issue (3)

- February 8, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/63/9c/639c8cbd5bec3cf91b0049afa8e3ce92a432c68bffcf4b1c5993bb5ff6c992dd), [SR00143DE_AML.pdf](https://openairdocs.org/files/sha256/97/5f/975fe5a5cdd85af85ab089ff4f91f0231088147f76ff30557418b257332c72cc)
- February 4, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/c7/2f/c72ffb7b04bdab96768603d262d7c7755b3cc81bad259c5f885dcd7991ed91c5), [SR00143DE AML.pdf](https://openairdocs.org/files/sha256/d7/a1/d7a1781927e87a0b72a8184b4c8eb1021c660c0717c251227ff47a2a475eedff)
- July 10, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/cf/59/cf59e133f9819e543781070f6b087b6234cc9fa4db31772153e2472fdc13e173)

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