STC SA02669CH

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

Installation of dual Innovative Solutions & Support (IS&S) Air Data Modules (ADM) in accordance with West Star Aviation Master Data List Document No. 70-334L001, Revision A, dated December 9, 2008, or later FAA approved revision.

1. The installer must determine whether this design change is compatible with previously approved modifications.

2. FAA Approved Flight Manual Supplement, West Star Aviation, Inc. Document No. 70-334B002, Revision I/R, approved January 15, 2009 or later FAA approved revision is a required part of this STC.

3. If the holder agrees to permit another person to use this certificate to alter the product, the holder must give the other person written evidence of that permission.

West Star Aviation, Inc 18 Terminal Drive East Alton, IL 62024-2254 A28CE Make : Cessna Model : 441 Date of application : April 11, 2008

Date of issuance : January 16, 2009

( Signature) Roy E. Boffo, Acting Manager Systems and Flight Test Branch Chicago Aircraft Certification Office

( Title)

FAA FORM 8110-2-1(10-69) PAGE 3 of 3 PAGES Number SA02669CH

Date of Issuance: January 16, 2009

Certification Basis (continued)

Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Cessna 441 series aircraft with the installation of dual Innovative Solutions & Support (IS&S) Air Data Modules (ADM)as follows:

a. The type certification basis for the Cessna 441 series ai rplanes is shown on TCDS A28CE for parts not changed or not affected by this change.

b. The certification basis for the parts cha nged or affected by this change since the reference date of application, April 11, 2008, is based upon Part 23 as amended by Amendment 23-55. Based on 14 CFR §§ 21.115 and 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for this modification was determined to be:

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

23.301(a), (b); 23.303; 23.305(a), (b); 23.307(a); 23.341(a); 23.561(a), (b), (e); 23.603(a); 23.605(a); 23.607(b);

23.609(a), (b); 23.611; 23.613(a), (b), (d); 23.619(a), (b), (c); 23.625(a); 23.867(a), (b); 23.1301(a), (b), (c), (d);

23.1303(a), (c), (e), (f); 23.1307; 23.1309(a), (b), (c), (d), (e); 23.1322(a), (b), (c), (d), (e); 23.1323(c);

23.1325(b)(1); 23.1331(a), (b); 23.1351(a); 23.1357(a), (b), (c), (d); 23.1359(b), (c); 23.1365(a), (b), (d), (e), (f);

23.1431(a), (b); 23.1501(a), (b); 23.1529; 23.1581(a), (b), (c), (d), (f); 23.1585(a), (j).

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