# STC SA5170NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aviatek Aeronautical Systems, United States
- Description: Installation of a new fuel flow indicating system.
- Applied: February 14, 1991
- Status date: July 10, 1991
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- Certificate PDF: https://openairdocs.org/files/sha256/4c/80/4c80ea50907159e03006881ed5589f14cad6810ecb6141ebb8a64aca58d48498
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5D300AB50C757E5185256CC200122734.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA5170NM

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 707-300 Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-300B Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 707-300C Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

## 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 SA5170NM

This certificate, issued to: Aviatek Aeronauti cal Systems, Inc.

420 S. 96th, Suite 27 Seattle, WA 98108

Part 4b of the Civil Air Regulations.

Original ProductType Certificate Number: 4A26 Make: Boeing Model: 707-300, 707-300B, and 707-300C

Description of the Type Design Change: Installation of a new fuel flow indicating system accomplished in accordance with Aviatek Aeronautical Systems, Inc., Drawing List AAS-300, Revision IR, dated March 10, 1991.

Limitations and Conditions: Approval of this change in type design applies specifically to the above aircraft models only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft.

Date of application: February 14, 1991 Date reissued:

Date of issuance: July 10, 1991 Date amended:

(Signature) Manager, Seattle Aircraft Certification Office, ANM-100S (Title)

## Every issue (1)

- July 10, 1991: Issued, Current. [certificate](https://openairdocs.org/files/sha256/4c/80/4c80ea50907159e03006881ed5589f14cad6810ecb6141ebb8a64aca58d48498)

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