STC SA7137SW-D

Ban 500 & 9 dia Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A713754-0 This contificato, issuas lo S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 solifes that the shange in the lyps design for the following product with the limitations and conditions thomfor as specified horeon meets the sirworthiness requiremont of Port 3 of the CiVil Air Regulations Original Product -Typo Cortificala Numbos: 3A20 Make: Beech Model: 65-90, 65-490, B90, C90, and £90 Description of Type Design Change:

Installation of S-TEC Yaw Damper System, Model ST-404, according to Bulletin No.

504, Revision 2, dated 8-09-91 and Master Drawing List No. 92417, Revision B, dated 8-09-91 and/or later FAA Approved revisions of the above data (28 Volt System).

1. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89729, dated 2-04-87 is required for Beech Models B90 and C90 and/or later FAA Approved revisions of the above supplement.

(See Continuation Sheet, Page 2, a part of this STC.)

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89729-1, dated 6-09-8/ is required for Beech Models 65-90, 65-A90, B90, and C90 and/or later FAA Approved revisions of the above supplement.

3. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89946, dated 9-09-91 is required for Beech Model E90 and/or later FAA Approved revisions of the above supplement.

4. Compatibility of this modification with other previously approved modifications must be determined by the installer.

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