STC SA01923LA

This Certificate issued to HORIZON INSTRUMENTS, INC.

600 S. Jefferson Street, Unit C Placentia, California 92870 Part * of the * Air Regulations Original Product Type Certificate Number :

**see attached FAA Approved Model List (AML) No.

* SA01923LA for list applicable aircraft make and

* models and applicable airworthiness regulations Description of Type Design Change: Installation of the P-1000 Digital Electronic Tachometer.

Limitations and Conditions : This approval should not be extended to other specific airplanes of these models on which other previously approve d modifications are incorporated unless it is determined that the interrelationship between th is change and any of those other previously approved modifications will introduce no adverse eff ect upon the airworthiness of that airplane.

A copy of this STC must be included in the perman ent records of the modified aircraft. If the holder agrees to permit 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 : May 19, 2006

Date of issuance : January 23, 2007

( Signature) Manager, Propulsion Branch Los Angeles Aircraft Certification Office ( Title)

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