# STC SH4935NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Onboard Systems International, United States
- Description: Fabrication of Onboard Systems Model E-72 Cargo Hook Load Cell System in accordance with FAA approved Onboard Systems Master Drawing List No. 155-012-00, Revision 3, dated December 10, 1996, or later FAA approved revision; and installation of this system in accordance with FAA approved Onboard Systems Owner's Manual No. 120-019-00, Revision 3, dated December 10, 1996, or later FAA approved revision. Inspect load cell in accordance with Section 5 of Onboard Systems Owner's Manual No. 120-019-00, dated December 10, 1996, or later FAA approved revision.
- Applied: April 3, 1990
- Status date: September 20, 2007
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H2SW](https://openairdocs.org/tcds/H2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/6a/b0/6ab079d8f3cc7de1d7dcf8d8559ffa5080d20b1a7ecf6d7696c3a9ec4240eb9d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D5B4939873D86940862579C1007B3E2B.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH4935NM

## ADs that name it (0)

None.

## Approved models (5)

- Bell Helicopter Textron Canada Limited 206L ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-1 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-3 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 206L-4 ([TCDS H2SW](https://openairdocs.org/tcds/H2SW))
- Bell Helicopter Textron Canada Limited 407 ([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 SH4935NM This certificate, issued to Onboard Systems 13915 NW 3rd Court Vancouver, WA 98685 Part 6 of the Civil Air Regulations.

Original ProductType Certificate Number: H2SW Make: Bell Helicopter Textron Model: 206L, 206L-1, 206L-3, 206L-4 and 407 Description of the Type Design Change: Fabrication of Onboard Systems Model 200-040-00 and 200-040-04 Load Weigh Kits in accordance with FAA approved Onboard Systems Master Drawing List No. 155-012-00, Revision 15, dated November 29, 2006, or later FAA approved revision; and Installation of these Load Weigh Kits in accordance with FAA approved Onboard Systems Owner’s Manual No. 120-019-00, Revision 10, dated November 28, 2006, or later FAA approved revision. This modification must be inspected and maintained in accordance with Section 4 of the FAA approved Onboard Systems Owner’s Manual No. 120-019-00, revision 10, dated November 28, 2006, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to only those models listed above, which are equipped with Bell external cargo hook suspension assembly P/Ns 206-706-341-5, -101, and -109 only.

This approval should not be extended to other rotorcraft of these models 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 helicopter. Rotorcraft modified in accordance with this STC must be operated in accordance with an FAA approved copy of Onboard Systems Rotorcraft Flight Manual Supplement (RFMS), dated September 19, 2007, or later FAA approved revision. A copy of this Certificate and 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: April 3, 1990 Date reissued:

Date of issuance: May 15, 1990 Date amended: 1/17/1997; 1/13/2003; 9/20/2007

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- September 20, 2007: Amended, Current. [certificate](https://openairdocs.org/files/sha256/6a/b0/6ab079d8f3cc7de1d7dcf8d8559ffa5080d20b1a7ecf6d7696c3a9ec4240eb9d)
- January 13, 2003: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/c0/ec/c0ece9bc9279699ca89af25f0fca840c298726d51cfca0d8314ae61eac204b4b)

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