STC SA02564CH

Part 23 of the Federal Aviation Regulations. (See Page 3 for complete certification basis)

Installation of a Bendix/King EFS-50 Electronic Flight Instrument System in accordance with Rickenbacker Avionics Master Data List, Document No. 05-0014MDL, Revision 2, dated May 14, 2008, or later FAA approved revision.

1. Descriptive data pertaining to this design change are consid ered inadequate for duplication in other aircraft. This approval is limited to only the installation made in Twin Commander 690B, Serial Number 11517.

2. FAA Approved Flight Manual Supplemen t, Rickenbacker Avionics Document No. 05-0014FMS, Revision IR, approved May 20, 2008, or later FAA approved revision is a required part of this STC.

3. FAA Approved Instructions for Conti nued Airworthiness, Rickenbacker Avionics Document No.05-0014ICA, Chapter 10 - Airworthiness Limitations, Revision 1, approved April 18, 2008, or later FAA approved revision is required for this modification.

Rickenbacker Avionics, LLC 2820 Bobmeyer Road, Hangar C-6 Hamilton, OH 45015-1308 2A4 Make : Twin Commander 690B Model :

Date of application : October 03, 2005

Date of issuance : May 22, 2008

( Signature) Charles L. Smalley, Manager Systems and Flight Test Branch Chicago Aircraft Certification Office

( Title)

FAA FORM 8110-2-1(10-69) PAGE 3 of 3 PAGES Number SA02564CH

Date of Issuance: May 22, 2008

Certification Basis (continued)

Based on 14 CFR §§ 21.101 and 21.115, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Commander 690B aircraft with the installation of the Bendix/King EFS-50 Electronic Flight Instrument System is as follows:

a. The type certification basis for Commander 690B airplane is shown on TCDS 2A4 for parts not changed or not affected by the change.

b. The certification basis for parts changed or affected by the change since the reference date of application, October 03, 2005, is based upon part 23 as amended by Amendment 23-55 and included in Special Conditions 23-191-SC, dated June 12, 2006 (HIRF). Based on 14 CFR §§ 21.101 and 21.115, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification is determined to be:

Regulations at the latest amendment 23-0 through 23-55

23.301; 23.303; 23.305(a), (b); 23.307(a); 23.365(a), (b), (c), (d); 23.561(a), (b), (e); 23.571(a), (c); 23.573(b);

23.575; 23.601; 23.603; 23.605(a); 23.607; 23.609; 23.611; 23.613(a), (b), (c), (d); 23.619; 23.625(a); 23.627;

23.771(a); 23.773(a)(2); 23.777(a), (b); 23.867; 23.1301(a), (b), (c), (d); 23.1303(a), (c), (e), (f); 23.1307;

23.1309(a), (b), (c), (d), (e); 23.1311(a), (b); 23.1321(a), (c), (d), (e); 23.1322; 23.1327(a); 23.1331 (a), (b);

23.1335; 23.1351(a); 23.1353(a), (b), (c), (d), (e), (h); 23.1357(a), (b), (c), (d); 23.1359(b), (c); 23.1365(a), (b), (d),

(e), (f); 23.1367; 23.1381; 23.1431; 23.1501; 23.1529; 23.1541(a), (b); 23.1543; 23.1545; 23.1547; 23.1581(a),

(b), (c), (d), (f); 23.1583(m); 23.1585(a), (j).

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