STC SA01249AT

Part 23 of the Federal Avation Regulations.

Description of Type Design Change: Installation of left hand and right hand nacelle fuel cell assemblies in accordance with A/C Fuel Cells Worldwide, Inc., “Installation Instructions”, dated August 30, 1994; A/C Fuel Cells Worldwide, Inc., Drawing P4718-1, Revision B, dated August 20, 1998(was Drawing P4718, Revision A, dated December 2, 1996 (P/N P4718-1), for the left hand side nacelle fuel cell; and Drawing P4719-1, Revision B, dated August 20, 1998 (was Drawing P4719, Revision A, dated December 2, 1996 (P/N P4719-1), for the right hand side nacelle fuel cell; or later FAA approved revision.

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 – All serial Numbers Date reissued: July 31, 2002; April 29, 2009

Date amended: December 30, 1998 January 25, 1999

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

( Title)

Date of application: February 28, 1995

Date of issuance: January 23, 1997

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

Number SA01249AT

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