# STC SH4796NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Isolair Inc., United States - Description: Manufacture and installation of Isolair Model 3900-110 Spray Tank System - Applied: November 17, 1987 - Status date: February 6, 2025 - Product: Aircraft, Rotorcraft - Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW) - Certificate PDF: https://openairdocs.org/files/sha256/14/9e/149e85f1f26e45cb76c045cbc7be9ea8ae4c2f8e45d323425d3daf83981394ca - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID199824310720250703154646.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SH4796NM ## ADs that name it (0) None. ## Approved models (1) - Bell Helicopter Textron Canada Limited 206B ([TCDS H2SW](https://openairdocs.org/tcds/H2SW)) ## 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. F AA Form 8110-2 (03/21) Approval of this change in type design applies to the make and model helicopter listed above equipped with high skid landing gear. This approval should not be extended to other rotorcraft of this make and model on which other modifications are incorporated unless it is determined by the installer that the relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effects upon the airworthiness of that rotorcraft. SH4796NM Isolair, Inc. 365 W Taft Vineland Road, Suite 100 Orlando, FL 32824 Part 6 CAR H2SW Bell Textron Canada Limited 206B Manufacture and installation of Isolair Model 3900-110 Spray Tank System in accordance with Federal Aviation Administration (FAA) approved Installation Instructions No. 3900-50, Pages 1 and 2, and Figures 1 through 7, Revision A, dated February 14, 1990, and Drawing List Report No. 3980-110, Pages 1 through 4, dated February 14, 1990, or later Federal Aviation Administration (FAA) approved revisions. The modified helicopter must be maintained in accordance with Isolair Maintenance Instructions No. 3900-10, dated February 14, 1990, or later FAA-approved revision. Optional installation of Isolair Model 3900-206 Spray System in accordance with FAA-approved Installation Manual No. 39206INS, Revision B, dated August 22, 2006, or later FAA-approved revision. Manufactured in accordance with Master Drawing List 3900-206, Revision IR, dated August 14, 2006, or later FAA-approved revision. The modified helicopter must be maintained in accordance with Isolair Document 3900ICA, Revision A, dated August 6, 2006, or later FAA-accepted revision. November 17, 1987 December 15, 2011; March 20, 2013; February 6, 2025 February 16, 1990 September 26, 2006; December 6, 2007 for Manager, West Certification Branch Page 2 of 3 FAA Form 8110-2 (03/21) SH4796NM Model 206B rotorcraft modified in accordance with this STC must be operated in accordance with an FAA approved copy of the Rotorcraft Flight Manual Supplement (RFMS). For the 3900-110 Spray Tank System use RFMS “Rotorcraft Flight Manual Supplement for Bell Model Helicopters equipped with an Isolair Model 3900 110 Spray Tank System,” dated February 16, 1990, or later FAA-approved revision. For the Model 3900-206 Spray System use Document No. 39206FMS, Revision I/R, FAA-approved September 26, 2006, or later FAA approved revision. A copy of this certificate, applicable FAA approved RFMS, and Maintenance Manual must be maintained as part of the permanent records for the modified rotorcraft. 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. NOTE: Restricted category rotorcraft may not be operated in a foreign country without the express written approval of that country. NOTE: This rotorcraft has not been shown to meet the requirements of the applicable comprehensive and detailed airworthiness code as provided by Annex 8 of the Convention on International Civil Aviation. NOTE: The rotorcraft noise was not shown to comply with the noise requirements in Title 14 Code of Federal Regulations part 36. End SH4796NM ## Every issue (6) - February 6, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/14/9e/149e85f1f26e45cb76c045cbc7be9ea8ae4c2f8e45d323425d3daf83981394ca) - March 20, 2013: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/c3/c8/c3c8e9f289d1108619c469e0d6e90df2f2a5e78533ea4ece9fd93e5dfd364da4) - December 15, 2011: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/cc/fb/ccfb74455e243fcb633a5d70fbf242f729eab88cb1b4205b8b70405b309b5e85) - December 6, 2007: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/7d/1b/7d1b52e04531e11533d6d3f05515f26707ddfc07d989af268e992b759543d240) - September 26, 2006: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/c7/95/c795fd4b035edda469e448a69abb1861dc1436c7f6f8752292141d373a737e42) - February 16, 1990: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/04/78/04789438379aed063ca9bab6e89ecabc99f246807cb53617d2b9151c8b53bde2) --- 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.