# STC SH4751NM

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Onboard Systems International, United States
- Description: Fabrication of Onboard Weighing Systems Model E-47 Cargo Hook Load Cell System.
- Applied: February 28, 1989
- Status date: May 7, 2010
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/47/f2/47f2cb036cd4046b584ced22103c6ed5df09337264d58da36545b13b60f7cc8b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7C7EFD1F570D892186257726006166A0.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH4751NM

## ADs that name it (0)

None.

## Approved models (3)

- Bell Helicopter Textron 204B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))

## 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 SH4751NM

This certificate, issued to: Onboard Systems International 13915 NW 3rd Court Vancouver, WA 98685

Part * of the * Regulations.

Original Product⎯Type Certificate Number: * See Attached Approved Model List No. SH4751NM Make: * for List of Approved Rotorcraft Models and Model: * Applicable Airworthiness Regulations

Description of the Type Design Change: Fabrication of Onboard Systems Model 200-044-00 and 200-044-01 Load Weigh Kit System in accordance with FAA-approved Onboard Systems Master Drawing List (MDL) No. 155-001-00, Revision 23, dated April 07, 2010, or later FAA-approved revision; and Installation of this system in accordance with FAA-approved Onboard Systems Owner’s Manual No. 120-021-00, Revision 14, dated March 05, 2010, 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. 120-021-00, Revision 14, dated March 05, 2010, or later FAA-approved revision.

Limitations and Conditions: Approval of this change in type design applies to only those model rotorcraft listed on Approved Model List (AML) No. SH4751NM, dated January 03, 1990, or later FAA-approved revision, which are equipped with Bell external cargo hook suspension assembly, P/N 204-072-915-11, P/N 204-072-915-25 or P/N 204-072-915-103. 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) 121-034-00 dated September 19, 2007, or later FAA-approved revision.

A copy of this Certificate, AML No. SH4751NM, 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: February 28, 1989 Date reissued: Xxxxxxx ##, #### Date of issuance: July 28, 1989 Date amended: January 03, 1990; July 27, 1990; September 20, 2007;

May 07, 2010

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title) Original Signed by Robert H. Duffer

## Every issue (1)

- May 7, 2010: Amended, Current. [certificate](https://openairdocs.org/files/sha256/47/f2/47f2cb036cd4046b584ced22103c6ed5df09337264d58da36545b13b60f7cc8b)

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