# STC SA3508NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Frederick F. Eaton, United States
- Description: Incorporation of a second engine friven vacuum pump into the aircraft vacuum system.
- Applied: March 24, 1986
- Status date: June 12, 1986
- Product: Aircraft
- Certification basis: Part 21
- Data sheets: [TCDS 3A24](https://openairdocs.org/tcds/3A24)
- Certificate PDF: https://openairdocs.org/files/sha256/de/d6/ded6e73f423907f7051e90a8a59179001bdd39fb11d648e702fb13ba8865b9b5
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CE5CFD76E547450A862579DB007AD57C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3508NM

## ADs that name it (0)

None.

## Approved models (1)

- Cessna Aircraft Company A185F ([TCDS 3A24](https://openairdocs.org/tcds/3A24))

## 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: SA3508NM This certificate issued to: Fredrick F. Eaton Part 3 of the CiVIl Air Regulations:

Original Product - TypePertificale Lumber: 3A24 Make: Cessna Model: A185F Description of Type Design Change:

Incorporation of a second engine driven vacuum pump into the aircraft vacuum system, in accordance with Fredrick F. Eaton Installation Procedure dated March 10, 1986.

Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is limited to the installation in Cessna A185F Serial Number 18503771 only. A copy of this Certificate shall be maintained as part of the permanent records for the modified aircraft.

## Every issue (1)

- June 12, 1986: Issued, Current. [certificate](https://openairdocs.org/files/sha256/de/d6/ded6e73f423907f7051e90a8a59179001bdd39fb11d648e702fb13ba8865b9b5)

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