# STC SR00026DE - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Midwest Aerospace TC LLC, United States - Description: Installation of tailboom 24 inch plug extension, commercial style main rotor blades, and rotorhead. - Applied: February 5, 1991 - Status date: February 8, 2023 - Product: Aircraft, Rotorcraft - Certification basis: Part 29 - Data sheets: [TCDS H3NM](https://openairdocs.org/tcds/H3NM), [TCDS H13WE](https://openairdocs.org/tcds/H13WE), [TCDS H1RM](https://openairdocs.org/tcds/H1RM), [TCDS H5SO](https://openairdocs.org/tcds/H5SO), [TCDS H7SO](https://openairdocs.org/tcds/H7SO), [TCDS H3SO](https://openairdocs.org/tcds/H3SO) - Certificate PDF: https://openairdocs.org/files/sha256/58/00/580001d06cdf5e2944e9007c7f3195dea81050cc3cb5ba8a1fe3f4150b39b20b - Approved model list and other attachments: [SR00026DE_AML.pdf](https://openairdocs.org/files/sha256/e9/13/e913c3a7f7c4e439e97f0a6a9f383291875e588d7113c9f05f12b9a7958a055a) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID185319474820230602182300.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SR00026DE ## ADs that name it (1) - [AD 2021-15-14](https://openairdocs.org/ad/2021-15-14): Rotorcraft Tail Boom · California Department of Forestry UH-1H, UH-1F, TH-1L and 39 more. Effective Aug 30, 2021. Named in the applicability ## Approved models (6) - Garlick Helicopters Inc. UH-1B ([TCDS H13WE](https://openairdocs.org/tcds/H13WE)) - Garlick Helicopters Inc. UH-1B ([TCDS H3NM](https://openairdocs.org/tcds/H3NM)) - Hawkins & Powers Aviation Inc. UH-1B ([TCDS H1RM](https://openairdocs.org/tcds/H1RM)) - International Helicopters Inc. UH-1B ([TCDS H5SO](https://openairdocs.org/tcds/H5SO)) - Richards Heavylift Helo Inc. UH-1B ([TCDS H3SO](https://openairdocs.org/tcds/H3SO)) - Williams Helicopter Corporation UH-1B ([TCDS H7SO](https://openairdocs.org/tcds/H7SO)) ## 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) SR00026DE Midwest Aerospace TC LLC 9465 Joliet Street St. John, IN 46373 29* the Federal Aviation Regulations * * * See attached FAA Approved Model List (AML) No. SR00026DE for list of approved rotorcraft models and applicable airworthiness regulations Installation of tailboom 24" plug extension, commercial system main rotor blades, and rotorhead in accordance with San Joaquin Helicopters, Inc. Installation Instructions Report SJH-UH1-005, and Top Drawing List SJH-UH1-001, dated November 13, 1992, FAA Approved March 16, 1993, or later FAA approved revision. February 5, 1991 June 27, 1995; September 6, 2012; February 8, 2023 March 18, 1993 June 1, 1993; April 12, 2002 for Manager, West Certification Branch 1. San Joaquin Helicopters Rotorcraft Operations Manual Supplement No. 1 for the UH-1B, FAA Approved March 18, 1993 or later FAA Approved Revision. 2. San Joaquin Helicopters Rotorcraft Maintenance Manual Supplement No. 1 is required for the STC. 3. San Joaquin Helicopters Rotorcraft Installation Instructions Report SJH-UH1-005 is required for this STC. FAA Form 8110-2 (03/21) SR00026DE End FAA Form 8110-2 (03/21) Limitations and Conditions Continued: SR00026DE 4. Aircraft modified by this STC are limited for use per FAR 21.93(b)(4) to: a) Agricultural aircraft operations as defined in FAR 137.3 effective January 1, 1966 and for dispensing of Fire Fighting Materials. b) External Load Operations. Carrying of External Loads as defined in FAR 133.1.(b), effective December 20, 1976. 5. This approval should not be extended to rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft. 6. A copy of this Certificate, Continuation Sheet, Flight Manual Supplement, and Maintenance Manual Supplement must be maintained as part of the permanent records for the modified rotorcraft. 7. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission. ### SR00026DE_AML.pdf FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SR00026DE Midwest Aerospace TC LLC For Installation of A 24” Tailboom Extension ISSUE DATE: April 12, 2002 Page 1 of 1 **ITEM ROTORCRAFT MAKE ROTORCRAFT MODEL** ORIGINAL TC NUMBER Maintenance Manual Supplement 1 Approval Date FAA Approved Drawing List Approved March 16, 1993 Rotorcraft Flight Manual Supplement & Date AML REV DATE Number Revision & Date 1. Garlick UH-1B H3NM 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993 9/26/2001 2. Garlick UH-1B H13WE 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993 3. Hawkins & Power UH-1B H1RM 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993 4. International Helicopters, Inc. **UH-1B H5SO 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993** 5. Southern Aero Corp. UH-1B H3SO 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993 9/26/2001 6. Williams Helicopter Corporation UH-1B H7SO 3/18/1993 SJH-UH1- 001 NR 11/13/1992 3/18/1993 FAA Approved: for Manager, West Certification Branch AMENDED: June 1, 1993, April 12, 2002 REISSUED: June 27, 1995; September 6, 2012; February 8, 2023 ## Every issue (3) - February 8, 2023: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/58/00/580001d06cdf5e2944e9007c7f3195dea81050cc3cb5ba8a1fe3f4150b39b20b), [SR00026DE_AML.pdf](https://openairdocs.org/files/sha256/e9/13/e913c3a7f7c4e439e97f0a6a9f383291875e588d7113c9f05f12b9a7958a055a) - September 6, 2012: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/8b/dd/8bdd8a86a8393cf4cd5e84912b186b9413e89aceecfad496280133ac1a3156d9), [SR00026DE_AML.pdf](https://openairdocs.org/files/sha256/ef/94/ef9454e4f5c465026c291e0513fa38f0063926cd76bba38e4f2b39b71eb9e2e3) - April 12, 2002: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/12/76/1276edf56dd661c7098c930c12d2600a94f3d1cc82b8288b240e5e152626a437) --- 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.