# STC SA00304DE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Stevens Aviation Inc, United States
- Description: Installation of Allied Signal MK-VI ground proximity warning system (GPWS).
- Applied: May 13, 1997
- Status date: August 5, 1997
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A20](https://openairdocs.org/tcds/3A20)
- Certificate PDF: https://openairdocs.org/files/sha256/b3/e2/b3e2bbed915de0bdc7dfd07381165cdb7b0efe727169f2e5ed9f3d877df9f50a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C52BA453D7A810B585256CC1007DC898.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA00304DE

## ADs that name it (0)

None.

## Approved models (1)

- Hawker Beechcraft Corporation C90A ([TCDS 3A20](https://openairdocs.org/tcds/3A20))

## 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: SA00304DE This certificate issued to: Stevens Aviation, Inc.

Part 23 of the Federal Aviation Regulations.

Original Product -Type Certificate Number: ЗА20 Make: Beech Aircraft Corporation Model: C90A Description of Type Design Change:

Installation of Allied Signal Mk-VI Ground Proximity Warning System (GPWS) in accordance with Stevens Aviation Master Drawing TW-A-703-000, revision Ø, FAA Approved August 5, 1997 or later approved revision.

1. FAA approved Airplane Flight Manual Supplement, TW-A-703-FMS, dated August 5, 1997 or later approved revision is required.

2. This approval should not be extended to aircraft 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 aircraft.

Date of Application: May 13, 1997 Date Reissued:

Date of Issuance: August 5, 1997 Date Amended:

FEDERA AVIATION By Direction of the Administrator el t Ronald F. May (Signature) Manager * MINISTRATION Northwest Mountain Region Denver Aircraft Certification Office (Title)

## Every issue (1)

- August 5, 1997: Issued, Current. [certificate](https://openairdocs.org/files/sha256/b3/e2/b3e2bbed915de0bdc7dfd07381165cdb7b0efe727169f2e5ed9f3d877df9f50a)

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