# STC SH733NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Onboard Systems, United States
- Description: Installation of weighing system
- Applied: December 8, 1978
- Status date: August 2, 1990
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H1SW](https://openairdocs.org/tcds/H1SW), [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- Certificate PDF: https://openairdocs.org/files/sha256/dd/45/dd4510a497b148072362caa7179f9ab9730cb02902d1656347da7a1ddecf6e42
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B5A048B1A2791F9685256CC2006221F1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH733NW

## ADs that name it (0)

None.

## Approved models (5)

- Bell Helicopter Textron Inc. 204B ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 205A-1 ([TCDS H1SW](https://openairdocs.org/tcds/H1SW))
- Bell Helicopter Textron Inc. 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron Inc. 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- August 2, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/dd/45/dd4510a497b148072362caa7179f9ab9730cb02902d1656347da7a1ddecf6e42)

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