# STC SR09177RC - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Midwest Aerospace TC LLC, United States - Description: Modification of the vertical fin spar - Applied: April 7, 1997 - Status date: February 8, 2023 - Product: Aircraft, Rotorcraft - Data sheets: [TCDS H13WE](https://openairdocs.org/tcds/H13WE), [TCDS H3NM](https://openairdocs.org/tcds/H3NM), [TCDS H1RM](https://openairdocs.org/tcds/H1RM), [TCDS H5SO](https://openairdocs.org/tcds/H5SO), [TCDS R00012AT](https://openairdocs.org/tcds/R00012AT), [TCDS H6SO](https://openairdocs.org/tcds/H6SO), [TCDS H3SO](https://openairdocs.org/tcds/H3SO), [TCDS H5NM](https://openairdocs.org/tcds/H5NM), [TCDS H7SO](https://openairdocs.org/tcds/H7SO), [TCDS H8NM](https://openairdocs.org/tcds/H8NM), [TCDS H4NM](https://openairdocs.org/tcds/H4NM) - Certificate PDF: https://openairdocs.org/files/sha256/4e/b4/4eb40e3bda7746199d12c2b54330d9c40d90edc609c640b391c008346bfb4daf - Approved model list and other attachments: [SR09177RC_AML.pdf](https://openairdocs.org/files/sha256/a0/a6/a0a6c0dbaa670854c5d100a44db47894c9ddca3ad4d75b26d90c96fd39d1839b) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID142734438320230606133315.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SR09177RC ## ADs that name it (0) None. ## Approved models (18) - Bell Textron Inc. TH-1L ([TCDS H4NM](https://openairdocs.org/tcds/H4NM)) - Bell Textron Inc. UH-1E ([TCDS H4NM](https://openairdocs.org/tcds/H4NM)) - Bell Textron Inc. UH-1L ([TCDS H4NM](https://openairdocs.org/tcds/H4NM)) - Garlick Helicopters Inc. UH-1B ([TCDS H13WE](https://openairdocs.org/tcds/H13WE)) - Garlick Helicopters Inc. UH-1B ([TCDS H3NM](https://openairdocs.org/tcds/H3NM)) - International Helicopters Inc. UH-1B ([TCDS H5SO](https://openairdocs.org/tcds/H5SO)) - Overseas Aircraft Support Inc. TH-1L ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Overseas Aircraft Support Inc. UH-1E ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Overseas Aircraft Support Inc. UH-1L ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) - Red Tail Flying Services LLC UH-1B ([TCDS R00012AT](https://openairdocs.org/tcds/R00012AT)) - Richards Heavylift Helo Inc. UH-1B ([TCDS H3SO](https://openairdocs.org/tcds/H3SO)) - Rotorcraft Development Corporation HH-1K ([TCDS H5NM](https://openairdocs.org/tcds/H5NM)) - Rotorcraft Development Corporation TH-1L ([TCDS H5NM](https://openairdocs.org/tcds/H5NM)) - Rotorcraft Development Corporation UH-1E ([TCDS H5NM](https://openairdocs.org/tcds/H5NM)) - Rotorcraft Development Corporation UH-1L ([TCDS H5NM](https://openairdocs.org/tcds/H5NM)) - Smith Helicopters UH-1E ([TCDS H8NM](https://openairdocs.org/tcds/H8NM)) - Southwest Florida Aviation International UH-1B ([TCDS H6SO](https://openairdocs.org/tcds/H6SO)) - WSH LLC UH-1B ([TCDS H1RM](https://openairdocs.org/tcds/H1RM)) ## 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. FAA Form 8110-2 (03/21) SR09177RC Midwest Aerospace TC LLC 9465 Joliet Street St. John, IN 46373 7 the Civil Air Regulations * * * See attached FAA Approved Model List (AML) No. SR09177RC for list of approved rotorcraft models and applicable airworthiness regulations. Modification of the vertical fin spar in accordance with Garlick Master Drawing List GHI 94-07, Revision D, dated February 23, 1998, or later FAA approved revision is required. April 7, 1997 July 10, 2007; February 4, 2009; February 8, 2023 October 6, 1998 January 26, 2012 for Manager, West Certification Branch 1. UH-1B aircraft must be equipped with UH-1C/M tail boom (per TM 55-1520-210-23P-1) to be eligible for this modifications. 2. Instructions for Continued Airworthiness (ICA) for the UH-1B, dated November 25, 1997, FTW AEG acceptance dated July 20, 1998, and the ICA for the UH-1E, UH-1L, TH-L, and HH-1K, dated November 25, 1997, FTW AEG acceptance dated July 20, 1998, or later FAA acceptance is required. 3. Compatibility of this design change with previously approved modifications must be determined by the installer. 4. If the holder agrees to permit another person to use this certificate, the holder shall give the other person written evidence of that permission. 5. A copy of this Certificate and ICA must be maintained as part of the permanent records of the aircraft. FAA Form 8110-2 (03/21) SR09177RC ### SR09177RC_AML.pdf **FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR09177RC** ISSUE DATE: October 6, 1998 Page 1 of 1 **ITEM AIRCRAFT /MAKE AIRCRAFT MODEL** **ORIGINAL TC NUMBER CERTIFICATION BASIS FOR** **ALTERATION** 1. Garlick Helicopter, Inc. UH-1B H13WE, H3NM FAR 21.25(a)(2) 2. Hawkins & Powers Aviation, Inc. UH-1B H1RM FAR 21.25(a)(2) 3. International Helicopters, Inc. UH-1B H5SO FAR 21.25(a)(2) 4. Southern Helicopters, Inc. UH-1B R00012AT FAR 21.25(a)(2) 5. Southwest Florida Aviation UH-1B H6SO FAR 21.25(a)(2) 6. U.S. Helicopters, Inc. UH-1B H3SO FAR 21.25(a)(2) 7. Garlick Helicopter, Inc. UH-1E, UH-1L, TH-1L, HH-1K H5NM FAR 21.25(a)(2) 8. Scott Paper Co. UH-1E, UH-1L, TH-1L H7SO FAR 21.25(a)(2) 9. Smith Helicopters UH-1E H8NM FAR 21.25(a)(2) 10. UNC Helicopters, Inc. UH-1E, UH-1L, TH-1L H4NM FAR 21.25(a)(2) * Or later FAA Approved Revision FAA Approved: for Manager, West Certification Branch AMENDED: REISSUED: February 8, 2023 ## Every issue (3) - February 8, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/4e/b4/4eb40e3bda7746199d12c2b54330d9c40d90edc609c640b391c008346bfb4daf), [SR09177RC_AML.pdf](https://openairdocs.org/files/sha256/a0/a6/a0a6c0dbaa670854c5d100a44db47894c9ddca3ad4d75b26d90c96fd39d1839b) - February 4, 2009: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1d/32/1d321b108996eb76f60578ea4132b5380ef9a598d191d3135958e14ce6de3b49), [SR09177RC AML.pdf](https://openairdocs.org/files/sha256/45/b8/45b8c5001093f7259ddde2396b93699e5a0065e256cc194499d33f0f20901963) - July 10, 2007: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/d4/e2/d4e2e6d4e101974d9048f112b938812a0e482056e90b77379da5ea103d0e0661) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.