STC SA09650SC

700 S. University Parks Dr.

Suite 240 Waco, TX 76706

Part 8 of the Civil Air Regulations.

Original Product Type Certificate Number : 2A10 Make : Piper Model : PA-25; PA-25-235; PA-25-260

Description of Type Design Change: Installation of a Textron Lycoming IO-540 engine modified by STC SE7734SW.

The modification is in accordance with Baylor University Master Drawing List No. PA 25-0001, Rev. F, dated 3/31/2000, or later FAA approved revisions. Flight Manual Supplement dated 4/28/2000, or later FAA approved revision is required.

Limitations and Conditions: Limited to Piper PA-25 Series airplanes with the fuselage mounted fuel tank and Limited to the McCauley 1A200/FA8450 propeller with 82.3 to 84.0 inch diameter. Approved fuels are as follows:

(1) Ethanol, ASTM D-4806; (2) Ethanol, Brazil National Department of Fuels, Technical Regulation DNC-01/91, Specification for Anhydrous Fuel Ethanol (“AEAC”) or Hydrous Fuel Ethanol (“AEHC”); (3) Aviation Gasoline 100LL, ASTM D-910; (4) Mixtures of Anhydrous Ethanol or Hydrous Ethanol and Aviation Gasoline are authorized.

Mixtures of Ethanol and Aviation Gasoline are limited to a maximum of 25% Aviation Gasoline by volume.

Date of application : March 14, 1997

Date of issuance : April 28, 2000 Date reissued :

Date amended : June 9, 2005, Rev. 1

( Signature) Fred Stellar Acting Manager, Special Certification Office

(Title)

FAA Form 8110-2-1(10-69) Page 2 of 2

Number SA09650SC Date of Issuance: April 28, 2000 Date Amended: June 9, 2005

Limitations and Conditions (Continued): Compatibility of this design change with previously approved modifications must be determined by the installer. 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.