STC SA3211SW-D

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA321154-D This certificate issued to: Century Flight Systems, Inc.

F.M. 1195 P. O. Box 610 Mineral Wells, TX 76067 Part 3 of the CIV11 A 1r Regulations.

Original Product -Type bertificate Number: ABBA Make: Piper Model:

PA-31-325 Description of Type Design Change:

Installation of Mitchell Automatic Flight System Model AK636 consisting of a Piper Altimatic X Autopilot or Model AK686FD consisting of a Piper Altimatic X Flight Director Autopilot with Optional Remote Annunciator according to Bulletin No. 815, Revision 1, dated 10-25-77 and Master Drawing List No. 87A925, Revision A, dated 10-25-77 (28 Volt System) and/or later FAA Approved Revisions of the above data.

Limitations and Conditions: E11gible on Piper Mode1 PA-31-325, S/N 31-7712001 and Up.

FAA/DAS Approved Pilot's Operating Handbook Supplement, P/N 685546, dated 5-26-77, revised 11-9-77, is required for Piper Model PA-31-325, S/N 77-12001 and Up and /or later FAA approved revisions of the above supplement.

A Placard stating, "Conduct trim check prior to flight (See POH)" is required.

Compatibility of this modification with other previously approved modifications

Date of Application: 4-27-77 Jule wissued: 11-9-77; 4-26-78; 12-7-83 Revision 3 Date of Issuance: 5-26-77 Date Amended:

•EDERAL AVIATION Don P. Watson ( Signature ) PAMNISTRAIO Manager, Aircraft Certification Division Southwest Region (Title) 47 FAA FORM 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee) (2701ps preo saquers") from (Name of grantor) (Print or type) (Address of grantor) (Number and sireel ;

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+ 11= r. 0~. 1090-262.185