# STC SH7091NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Simplex Manufacturing Company, United States
- Description: Installation of a Simplex Manufacturing Company Model 8500 agricultural tank sprayer
- Applied: July 21, 1993
- Status date: March 5, 2014
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/d8/3d/d83d4b76017902c4594b4238288b0a3f33c14e5f0c4b45aa73080f49f72c5630
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/66CDBF37667D64D986257C9B005087D2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH7091NM

## ADs that name it (0)

None.

## Approved models (11)

- MD Helicopters Inc. 369 ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopters Inc. 369A ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- 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))
- MD Helicopters Inc. 369H ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopters Inc. 369HE ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopters Inc. 369HM ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopters Inc. 369HS ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopters 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.

Number SH7091NM

This certificate, issued to Simplex Manufacturing Company 13340 NE Whitaker Way Portland, OR 97230

Part 6 of the Civil Air Regulations.

Original ProductType Certificate Number: H3WE Make: MDHI (HUGHES) Model: 369, 369A, 369H, 369HM, 369HS, 369HE, 369D, 369E, 369F, 369FF, 500N

Description of the Type Design Change: Installation of a Simplex Manufacturing Company Model 8500 agricultural tank sprayer in accordance with Simplex Manufacturing Company Master Drawing List MDL8500, Revision C, dated May 23, 1996, or later FAA-approved revision.

Limitations and Conditions: Rotorcraft modified with this installation must be equipped with a Simplex electrical harness in accordance with Supplemental Type Certificate SH4173NM. This approval should not be extended to other rotorcraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship between this change and any of those other previously approved modifications will have no adverse effect on the airworthiness of that rotorcraft. This determination should include consideration of significant changes in weight distribution, such as an increase in the fixed disposable weight in the fuselage. FAA-approved Rotorcraft Flight Manual Supplement dated June 11, 1996, or later FAA-approved revision is required. A copy of this certificate and the FAA-approved RFMS 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.

Date of application: July 21, 1993 Date reissued: March 5, 2014 Date of issuance: May 23, 1994 Date amended: June 11, 1996

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- March 5, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/d8/3d/d83d4b76017902c4594b4238288b0a3f33c14e5f0c4b45aa73080f49f72c5630)
- June 11, 1996: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/5a/35/5a35cc6f0c8d216313c93bffb6335101ddc44a708b11b6955b4fe934037674c4)

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