# STC SH413NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Measurement Systems Intl, United States
- Description: Installation of  an electronic weighing system
- Applied: November 22, 1976
- Status date: December 4, 1980
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 1H15](https://openairdocs.org/tcds/1H15)
- Certificate PDF: https://openairdocs.org/files/sha256/82/79/82796d316c6e99f274f045b828606e012738c5ca69928a6311b51649817c9018
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/57514AD1FBB2527886257A46006D9D2F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH413NW

## ADs that name it (0)

None.

## Approved models (4)

- Sikorsky Aircraft Corporation S-61L ([TCDS 1H15](https://openairdocs.org/tcds/1H15))
- Sikorsky Aircraft Corporation S-61N ([TCDS 1H15](https://openairdocs.org/tcds/1H15))
- Sikorsky Aircraft Corporation S-61NM ([TCDS 1H15](https://openairdocs.org/tcds/1H15))
- Sikorsky Aircraft Corporation S-61R ([TCDS 1H15](https://openairdocs.org/tcds/1H15))

## 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: SH413NW This certificate issued to: Measurement Systems International, Inc.

Part 7 of the Civil Air Regulations., effective August 1, 1956.

Original Product -IypeGertificate Number: 1H15 Make: Sikorsky Model: S-61 Series Description of Type Design Change: Installation of an electronic weighing system in accordance with Measurement Systems International, Inc. Installation Instructions Drawing No. D00397 or Drawing D00476.

Limitations and Conditions: Approval of this change in type design applies basically to the above model helicopters only. This approval should not be extended to other helicopters of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship 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.

A copy of this Certificate and FAA Approved Rotorcraft Flight Manual Supplement shall be maintained as part of the modified helicopters' permanent records.

Date of Application: November 22, 1976 Date Reissued: April 19, 1977 Date of Issuance: March 11, 1977 Date Amended: August 31, 1977; December 4, 1980 FEDERAL AVIATION haste dischareder (Signature ) TAMIN STRATO Acting Chief, Seattle Area Aircraft Certification Office (Title )

47.

## Every issue (1)

- December 4, 1980: Amended, Current. [certificate](https://openairdocs.org/files/sha256/82/79/82796d316c6e99f274f045b828606e012738c5ca69928a6311b51649817c9018)

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