# STC ST00174WI

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Midcoast Aviation Inc, United States
- Description: Installation of Bellows assembly in pneumatic system
- Applied: December 14, 1993
- Status date: October 21, 2002
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE)
- Certificate PDF: https://openairdocs.org/files/sha256/56/19/56195fdf2cdd9ee63664f1d5a8167c6e13d3ae5c5f4383ee2f7059c5f7725e3b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/06671C6DD10BF0BE8625747100567C0F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00174WI

## ADs that name it (0)

None.

## Approved models (3)

- Cessna Aircraft Company 500 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- Cessna Aircraft Company 550 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- Cessna Aircraft Company S550 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))

## 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: ST0017A91 This certificate issued to: Midcoast Aviation, Inc.

#14 Archview Drive Cahokia, IL, 62206 Certifies that the change in the type design for the following product with the limitations and conditions therefor as specified hereon meets the airvorthiness requirement's of Part 25 of the Federal Aviation Poegulations Original Product - - Type Certificate Number: A22CE Cessna Model: 500, 550, S550 Description of Type Design Change:

Installation of Bellows assembly in pneumatic system in accordance with Midcoast Aviation Inc. Installation Drawing Number 54-353F001, Revision B, or later FAA approved revision.

This approval should not be extended to airplanes on which other previously approved modifications are incorporated, unless it is determined that the relationship 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 airplane.

Date of Application: December 14, 1993 Date Reissued: October 21, 2002 Date of Issuance: July 22, 1994 Date Amended:

By Direction of the Administrator (Signature) Todd Dixon Program Manager Wichita Aircraft Certification Office (Title)

## Every issue (1)

- October 21, 2002: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/56/19/56195fdf2cdd9ee63664f1d5a8167c6e13d3ae5c5f4383ee2f7059c5f7725e3b)

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