# STC SR02713SE - Type: Supplemental type certificate - Status: Current, Issued - Holder: Mechanical Specialties Inc, United States - Description: Manufacture and Installation of Human External Cargo (HEC) Hook System - Applied: April 17, 2019 - Status date: April 2, 2021 - Product: Aircraft, Rotorcraft - Certification basis: Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 21, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27, Part 27 - Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) - Certificate PDF: https://openairdocs.org/files/sha256/1d/10/1d100dec6d64839a0af8e8b5e516d844e342462274166dc8d3d62f5915c26ce6 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F6CD92FBE48F5925862588C20046E94F.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SR02713SE ## ADs that name it (0) None. ## Approved models (4) - MD Helicopters Inc. 369D ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopters Inc. 369E ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopters Inc. 369F ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopters Inc. 369FF ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) ## 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 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: (See Continuation Sheet Page 3 of 4 Pages) SR02713SE Mechanical Specialties, LLC 975 85th Avenue SE Olympia, WA 98501 27 Federal Aviation Regulations H3WE MDHI (HUGHES) 369D, 369E, 369F, 369FF Manufacture and Installation of Human External Cargo (HEC) Hook System in accordance with Master Drawing List for 369 Human External Cargo Hook System, Report No. 369-430-107, Revision B, dated February 23, 2021 or latter FAA-approved revision. Maintained in accordance with the Instructions for Continued Airworthiness (ICA) for Mechanical Specialties, LLC Model 369-430-100 HEC Cargo Hook System, Document No. 369-430-105, Revision C dated February 23, 2021 or later FAA-accepted revision. (continued on page 3) Approval of this change in type design applies to the above model rotorcraft only. This approval should not be extended to other rotorcraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship (continued on page 3) April 17, 2019 April 2, 2021 For Acting Manager, Seattle ACO Branch 4 FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SR02713SE 4 FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: (See Continuation Sheet Page 4 of 4 Pages) SR02713SE Mechanical Specialties, LLC Issued: April 2, 2021 Operated in accordance with the Rotorcraft Flight Manual Supplement (RFMS) for Mechanical Specialties, LLC Human External Cargo Hook System, Document No. MS-369-430-110, Revision 0, dated March 24, 2021 or later FAA-approved revision. between this change and other previously approved modifications will introduce no adverse effect upon the airworthiness of that rotorcraft. A copy of this certificate, ICA and RFMS, must be maintained as part of the permanent records for the modified aircraft. 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. Certification Basis: As set forth in Type Certificate Data Sheet H3WE except for the following Federal Aviation Regulations are found in compliance with the shown later amendments: §27.21 Amdt 27-21 §27.25 Amdt 27-44 §27.27 Amdt 27-2 §27.301 Amdt 27-0 §27.303 Amdt 27-0 §27.305 Amdt 27-0 §27.307 Amdt 27-26 §27.309 Amdt 27-0 §27.337 Amdt 27-26 §27.571 Amdt 27-26 §27.601 Amdt 27-0 §27.603 Amdt 27-16 3 4 FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: End SR02713SE Certification Basis (cont) §27.605(a) Amdt 27-16 §27.607 Amdt 27-4 §27.609 Amdt 27-0 §27.610 Amdt 27-46 §27.613 Amdt 27-26 §27.619 Amdt 27-0 §27.625 Amdt 27-35 §27.773 Amdt 27-50 §27.777(a) Amdt 27-0 §27.865 Amdt 27-36 §27.1301 Amdt 27-0 §27.1307(d)(e) Amdt 27-0 §27.1309(a)(c) Amdt 27-46 §27.1322 Amdt 27-11 §27.1351(a)(1)(2) Amdt 27-13 §27.1357(a)(c) Amdt 27-13 §27.1365 Amdt 27-35 §27.1367 Amdt 27-0 §27.1529 Amdt 27-18 §27.1581 Amdt 27-14 §27.1585(a) Amdt 27-21 4 4 ## Every issue (2) - April 2, 2021: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1d/10/1d100dec6d64839a0af8e8b5e516d844e342462274166dc8d3d62f5915c26ce6) - September 20, 2022: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/ea/0a/ea0ac33ea795fd8a460d910b243fef050b93927ff103a95976b0e4e315ae5696) --- 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.