# STC SH3686NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Isolair Inc., United States - Description: Installation of an Isolair Model3700-110 spray tank system. (500N restricted category) - Applied: November 11, 1986 - Status date: February 6, 2025 - Product: Aircraft, Rotorcraft - Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE) - Certificate PDF: https://openairdocs.org/files/sha256/df/a7/dfa70b1c7c8c40d1dde96d88b6041dca1f7d6070f754df8b4d95a3cd89592b9b - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID122503551220250703153550.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SH3686NM ## ADs that name it (0) None. ## Approved models (9) - MD Helicopter Inc. 369D ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369E ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369F ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369FF ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369H ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369HE ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369HM ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 369HS ([TCDS H3WE](https://openairdocs.org/tcds/H3WE)) - MD Helicopter Inc. 500N ([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. Approval of this change in type design applies only to those basic MD Helicopters, LLC models referenced above that are equipped with either Hughes Jackpoint Doublers P/N 369H90017-19 or Isolair Stiffeners P/N 3700-19 and the Hughes high skid landing gear. This approval should not be extended to other rotorcraft of these models 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. Rotorcraft equipped with this spray system must be operated in accordance with Isolair Rotorcraft Flight Manual Supplement, dated February 20, 1987, or later FAA approved revision. A copy of Supplemental Type Certificate Number SH3686NM, Continuation Sheet and the Rotorcraft Flight Manual Supplement must be carried in the modified rotorcraft at all times. 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. SH3686NM Isolair, Inc. 365 W Taft Vineland Road, Suite 100 Orlando, FL 32824 Part 6 CAR H3WE MD Helicopters, LLC 369H, 369HM, 369HS, 369HE, 369D, 369E, and 500N Restricted Category Installation of an Isolair Model 3700-110 Spray Tank System in accordance with FAA sealed copies of Isolair Installation Instructions Number 3753-1, Revision A, dated February 18 1987, and Drawing List Report Number 3753, dated January 31, 1987, or later FAA approved revisions. November 11, 1986 February 6, 2025 February 20, 1987 February 19, 1993 for Manager, West Certification Branch Page 2 of 2 FAA Form 8110-2 (03/21) SH3686NM ## Every issue (1) - February 6, 2025: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/df/a7/dfa70b1c7c8c40d1dde96d88b6041dca1f7d6070f754df8b4d95a3cd89592b9b) --- 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.