STC SA01531LA

This Certificate issued to CO Guardian LLC.

1951 East Airport Drive Tucson, Arizona 85706 Part 3 of the Civil Air Regulations for Cessna 172 thru 172Q series, & Part 23 of the Federal Aviation Regulations for Cessna 172R and 172S. (*Certification basis is set forth in Type Certificate Data Sheet 3A12) Original Product Type Certificate Number :

3A12* Cessna Aircraft Company 172 through 172S Series Description of Type Design Change : Installation of CO Guardian Rem ote Carbon Monoxide Detector Instrument in accordance with FAA Approved CO Guardian Master Data List MD 452-02, Revision “D”, dated July 10, 2003, or later FAA approved revisi on; and the FAA Approved Supplem ental Airplane Flight Manual, Docum ent Num ber 01-2510-06, Revi sion “IR”, dated August 26, 2003, or later FAA approved revision for Cessna Models 172 through 172Q; and the FAA Approved Airplane Flight Manual Supplement, Docum ent Num ber 01-2510-05, Revision “IR”, dated August 26, 2003, or later approved revision for Cessna Models 172R and 172S.

Limitations and Conditions : This approval should not be incorporated in any aircraft unless it is determined that the interrelationship between this in stallation and any previously approved configuration will not introduce any adverse effect upon the airworthin ess of the aircraft. If the holder agrees to perm it another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application : March 25, 2003

Date of issuance : August 28, 2003

( Signature) Manager, Systems & Equipment Branch Los Angeles Aircraft Certification Office ( Title)