STC SA6017NM

This Certificate issued to Horizon Instruments, Inc.

600 S. Jefferson St., Unit C Placentia, CA 92870 Part 23 of the Federal Aviation Regulations, including Amendments 23-1 through 23-16 Original Product Type Certificate Number :

A51EU Aerospatiale TB9, TB10, TB20, TB21 Description of Type Design Change : Installation of an Electronic Digital Engine Tachom eter, Horizon Model P-1000, P/N P100300- (Applicability Table on con tinuation sheet) in Aerospatiale Model TB9, TB10, TB20, TB21 aircraft, in accordance with Horizon Master Drawing List No. P100300, Rev. N/C, dated January 15, 1993, or later FAA approved revision.

Horizon Airplane Flight Manual Supplement No. 1, Rev. N/C, April 29, 1993, or later approved revision is required.

Limitations and Conditions : The installation 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 airwor thiness of the aircraft. The approval of this modification applies to the above-noted airplane m odel series only. A copy of this STC m ust be included in the permanent records of the m odified 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 : January 28, 1993

Date of issuance : May 18, 1993

Date reissued : January 14, 2002 November 17, 2005

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

Page 2 of 2 Number SA6017NM

Applicability Table

Aircraft Model Serial Numbers Tachometer Part Number

TB9 All P100300-427- TB10 All P100300-801- TB20 All P100300-617- TB21 All P100300-617-

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