# STC SA578NW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Seattle Flight Service, Inc., United States
- Description: Install redesigned 7th seat(toilet).
- Applied: March 14, 1978
- Status date: May 12, 1978
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA)
- Certificate PDF: https://openairdocs.org/files/sha256/c4/6a/c46a035ae23bbb8d6d0e7c62d701247d127534ba1368338006e86ca777887af3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6E6DAB82BA6FFEA385256CC200122B79.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA578NW

## ADs that name it (0)

None.

## Approved models (1)

- Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))

## 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 Beal Supplemental Type Certificate Number: SA578NW This certificate issued to: Seattle Flight Service, INC.

Purt 3 of the Civil Air Regulations.

Original Product -Iype berlificale Number: ASEA Make: Piper Mirkel: PA-31 and 31T ' Jescriplion / Type Jesiyn thange: Installation of a redesigned 7th seat (toilet) in accordance with Seattle Flight Service, Inc. Drawing No. PA 31-#7 seat.

Similaluns and fundilind: basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other The approval of this change in type design applies previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse affect upon the airworthiness of these aircraft. A copy of this Certificate and Seattle Flight Service, Inc.

Drawing No. PA 31-#7 shall be maintained as part of the permanent records.

Date of Application: March 14, 1978 I ate missed I ate of issuan" May 12, 1978 Date Amended:

FEDERAL AVIATION By direct D.2. Rigger • of the SAdministrater TOMINISTRATO Acting Chief, Engineering and Manufacturing Branch 4

## Every issue (1)

- May 12, 1978: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c4/6a/c46a035ae23bbb8d6d0e7c62d701247d127534ba1368338006e86ca777887af3)

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