# STC SH598NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Onboard Weighing Systems, United States
- Description: Installation of Onboard weighing system
- Applied: October 24, 1977
- Status date: May 18, 1978
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H3WE](https://openairdocs.org/tcds/H3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/91/fc/91fc374a335ea5cf3fa10a5d5a4f82d38b1ddb0b03a04c8001067b934625ed01
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0DF9A3437CDE4E2E85256CC20062214F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH598NW

## ADs that name it (0)

None.

## Approved models (10)

- MD Helicopter Inc. 369 ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369A ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369D ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369E ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369F ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369FF ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369H ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369HE ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369HM ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))
- MD Helicopter Inc. 369HS ([TCDS H3WE](https://openairdocs.org/tcds/H3WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SH598NW This certificate issued to: . ONBOARD WEIGHING SYSTEMS Purd 6 of the CiVIl Air Regulations.

Original Product -Iype tierlificate Number: HWE Make: Hugnes Model: 369 Series I escriplin of. ype I esign tehange Installation of ONBOARD WEIGHING SYSTEM in accordance with ONBOARD WEIGHING SYSTEM Installation Instructions anc Drawing List 1021 assembly.

Jimilalund and fundiles: The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications will introduce no adverse affect upon the airworthiness of that aircraft. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

Date of Application: October 24, 1977 I at missad Date of Issuance: May 18, 1978 Date Amended:

FEDERAL AVIATION By Direction of the Administrator nadia do krouter (Signature ) OMINISTRATO Chief, Engineering and Manufacturing Branch (Title) 47

## Every issue (1)

- May 18, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/91/fc/91fc374a335ea5cf3fa10a5d5a4f82d38b1ddb0b03a04c8001067b934625ed01)

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