STC SA01140AT

This certificate issued to

Part 3 of the Civil Air Regulations.

Description of Type Design Change: Installation of left hand and right hand side main tank fuel cell assemblies in accordance with A/C Fuel Cells Worldwide, Inc., “Installation Instructions”, dated August 30, 1994; and A/C Fuel Cells Worldwide, Inc., Drawing P4613, Revision A, dated February 9,1995, for the left hand side main fuel cell; and Drawing P4612, Revision A, dated February 9, 1995 for the right hand side main fuel cell; or later FAA approved revision.

(See continuation 3 of 3)

Limitations and Conditions: This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effects upon the airworthiness of the 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.

FFC Manufacturing 4010 Pilot Dr., Suite 103 Memphis, TN 38118 A8EA Make: Piper Model: PA-31P, S/N 3 thru 115 Date reissued: July 31, 2002; May 05, 2009

( Signature) Melvin D. Taylor Manager Atlanta Aircraft Certification Office

( Title)

Date of application: February 14, 1996

Date of issuance: September 03, 1996

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

Number SA01140AT

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

Number SA01140AT

Description of Type Design Changes Continued:

Left Hand Side Main Fuel Cell – P/N P4613-5

Right Hand Side Main Fuel Cell – P/N P4612-5