# STC SH4305NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Hillsboro Aviation Inc, United States - Description: Installation of Centrisep AE-A170-5, -6, or -7 Air Cleaners - Applied: October 27, 1986 - Status date: June 7, 2016 - Product: Aircraft, Rotorcraft - Certification basis: Part 21 - Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW) - Certificate PDF: https://openairdocs.org/files/sha256/1c/80/1c809a994fdeadf6130225d9d1ec900b5f6989a72778a2475d9ee34627258a1d - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5A41F432BD11A4D586257FCB00751650.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SH4305NM ## ADs that name it (0) None. ## Approved models (3) - Bell Helicopter Textron Inc. 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) - Bell Helicopter Textron Inc. 205B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW)) ## 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. Number SH4305NM This certificate, issued to Hillsboro Aviation, Inc. 3845 NE 30th Avenue Hillsboro, OR 97124 Part 7 of the Civil Air Regulations. Original ProductType Certificate Number: H1SW Make: Bell Model: 205, 205A-1, and 205B Description of the Type Design Change: Installation of Centrisep AE-A170-5, -6, or -7 Air Cleaners in accordance with Heli-Jet Publication ANM-100S-0226, dated December 1, 1987, or later Federal Aviation Administration (FAA) approved revision. Limitations and Conditions: Approval of this change in type design applies to the above model rotorcraft only. 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 relationship 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. A copy of this certificate and FAA Approved Flight Manual Supplement (FMS) dated February 3, 1995, for the Model 205A, and the FMS for the Models 205A-l and 205B, dated February 3, 1995, or later FAA-approved revisions, must be maintained as part of the permanent records for the modified rotorcraft. The limitations and conditions shown on Type Certificate Data Sheet (TCDS) No. H1SW for models 205A, 205A-1 and 205B remain applicable. 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. Date of application: October 27, 1986 Date reissued: April 12, 2013; June 7, 2016 Date of issuance: April 6, 1988 Date amended: January 12, 1989; February 10, 1995 (Signature) Manager, Seattle Aircraft Certification Office (Title) ## Every issue (3) - June 7, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/1c/80/1c809a994fdeadf6130225d9d1ec900b5f6989a72778a2475d9ee34627258a1d) - April 12, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/1e/0f/1e0fa8e35e9d5689f022f8058464a3fbdd55839af24a7ce40931c06d3595ad51) - February 10, 1995: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/02/a9/02a9e5bb8a53eda634763b56960512cde0e46c0549eec0df4fed752f380f4373) --- 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.