STC SA00304DE

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)