# STC SR11252DS - Type: Supplemental type certificate - Status: Current, Issued - Holder: Bell Textron Inc., USA - Description: Installation of additional Hoist Cable Cut Switches - Applied: September 12, 2022 - Status date: August 10, 2023 - Product: Aircraft, Rotorcraft - Certification basis: Part 29 - Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW) - Certificate PDF: https://openairdocs.org/files/sha256/80/ae/80ae08fb3cdfde96c2a0f5dfcbaaebb5e7dcec99b7e1e056a9b7d7e7810a7222 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID138952782220230929173228.0001 - DRS record last changed: May 26, 2026 - Page: https://openairdocs.org/stc/SR11252DS ## ADs that name it (0) None. ## Approved models (1) - Bell Textron Inc. 412EP ([TCDS H4SW](https://openairdocs.org/tcds/H4SW)) ## What the certificate says This is OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation * Federal Aviation Administration TORIMISTRATOS Supplemental Type Certificate Number: SR11252DS This certificate issued to: Bell Textron Inc. 441 Industrial Park Road Piney Flats TN 37686 Part 29 of Title 14, Code of Federal Regulations Original Product H4SW Make: Bell Textron Inc. Model: 412EP Description of Type Design Change: Installation of Additional Hoist Cable Cut Switches in accordance with Master Drawing List, Report No. AA-22025, Revision B, dated April 13, 2023, or later FAA approved revision. Description of Type Design Change: continued. See Continuation Sheet 1. Date of Application: September 12, 2022 Date Reissued: Date of Issuance: August 10, 2023 Date Amended: John T. Bouma ODA Lead administrator Title: BTI ODA-710621-SW United States of America Department of Transportation Federal Aviation Administration TORM STRATE Supplemental Type Certificate Number: SR11252DS FEDERAL AVIATION United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SR11252DS Continuation Sheet 1 of 3. 08/10/2023 Description of Type Design Change: (continued): Aeronautical Accessories Rotorcraft Flight Manual Supplement, Report No. AA-22033, No Revision, dated August 7, 2023, or later FAA approved revision, is required. Aeronautical Accessories Instructions for Continued Airworthiness, Report No. AA-22034, No Revision, dated November 23, 2022, or later FAA accepted revision, is required. This FEDERAL AVIATION United States of America Department of Transportation Federal Aviation Administration TORM STRATO Supplemental Type Certificate (Continuation Sheet) Number: SR11252DS Continuation Sheet 2 of 3. 08/10/2023 Limitations and Conditions: (continued): This STC is applicable to all serial numbers for Bell Textron Inc. Model 412EP with STC SH3189SO (External Non-HEC Hoist) installed. This STC is only applicable to Model 412EP aircraft with STC SH3189SO installed. The installer must determine whether this design change is compatible with previously approved modifications. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission. This FEDERAL AVIATIO United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SR11252DS Continuation Sheet 3 of 3. 08/10/2023 Certification Basis: Subpart C 29.301(a) [29-0], 29.303 [29-0], 29.305(a) [29-0], 29.307 (a) [29-0], 29.337(a) [29-0], 29.561(b) (3) 129-0]; Subpart D 29.601 (a) [29-0], 29.603 [29-0], 29.605 [29-0], 29.609(a) [29-0], 29.611 (a) [29-0], 29.613(d) [29-0], 29.619(b) (1) [29-0], 29.625(a) [29-0], 29.771(a) [29-0], 29.773(a)(2) [29-0], 29.777 [29-0], 29.785(a) (c) [29-0], 29.865(b)(1) [29-30]; Subpart F 29.1301 [29-0], 29.1309(a) [29-0], 29.1351(a)(1) [29-0], 29.1353(a)(b) [29-0], 29.1357(a)(c) [29-0]; Subpart G 29.1501(a) (b) [29-0], 29.1529 [29-20], 29.1541 [29-0], 29.1555(a)(d)(2) [29-24], 29.1561(a) [29-0], 29.1581 [29-0], 29.1585(a) 129-2]; Appendix A A29.1 [29-20], A29.2 [29-20], A29.3 [29-20], A29.4 [29-54]. - END - This ## Every issue (1) - August 10, 2023: Issued, Current. [certificate](https://openairdocs.org/files/sha256/80/ae/80ae08fb3cdfde96c2a0f5dfcbaaebb5e7dcec99b7e1e056a9b7d7e7810a7222) --- 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.