# STC SH4377NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Simplex Manufacturing Company, United States
- Description: Fabrication of Simplex Model 7900 spray booms and tank
- Applied: July 7, 1988
- Status date: December 6, 2013
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21, Part 27
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/77/5e/775e3acc670b384e889865184bd756316a707b381c222c5a1509c658483a6a96
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2183BF401B6C19D886257C3F004E547F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH4377NM

## ADs that name it (0)

None.

## Approved models (4)

- Bell Helicopter Textron (Canada) 206L ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-1 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-3 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron (Canada) 206L-4 ([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.

Number SH4377NM

This certificate, issued to Simplex Manufacturing 13340 N.E. Whitaker Way Portland, OR 97230

Part 27 of the Federal Aviation Regulations.

Original ProductType Certificate Number: H2SW Make: Bell Model: 206L, 206L-1, 206L-3, and 206L-4

Description of the Type Design Change: Fabrication of Simplex Model 7900 spray booms and tank in accordance with Simplex Master Drawing List (MDL) MDL7900, Revision Q, dated October 24, 2013, or later Federal Aviation Administration (FAA) approved revision. Installation in accordance with Simplex Installation Manual 790-102002-001, Revision A, dated October 30, 2013, or later 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 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, including changes in type design, will introduce no adverse effect upon the airworthiness of that rotorcraft. The modified rotorcraft must be operated in accordance with the FAA-approved Rotorcraft Flight Manual Supplement (RFMS) FMS7900, Revision B, dated November 13, 2013, or later FAA-approved revision and must be maintained in accordance with Simplex Maintenance Manual MM7900, dated August 31, 1988, or later FAA-approved revision. A copy of this certificate, the FAA-approved RFMS, and the 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.

Date of application: July 7, 1988 Date reissued:

Date of issuance: November 10, 1988 Date amended: July 5, 1994; December 6, 2013

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- December 6, 2013: Amended, Current. [certificate](https://openairdocs.org/files/sha256/77/5e/775e3acc670b384e889865184bd756316a707b381c222c5a1509c658483a6a96)
- July 5, 1994: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a0/19/a01954d047afd3922317dcca0e111d9a4c0851d4bdb268a9614e77de0c370335)

---
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.