# STC SA02183AK - Type: Supplemental type certificate - Status: Current, Amended - Holder: Power Flow Systems Inc., United States - Description: Fabrication of replacement engine exhaust system assembly (P/N PA18ESA). - Applied: November 3, 1999 - Status date: April 22, 2020 - Product: Aircraft, Small Airplane - Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2) - Certificate PDF: https://openairdocs.org/files/sha256/cc/5a/cc5ac7a441b3af7f18e28f5e28666e8ca48db137212dab2bdb04423775457d09 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID111096030420250728171228.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA02183AK ## ADs that name it (0) None. ## Approved models (18) - Piper Aircraft Inc. PA-18 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18-105 (Special) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18-125 (Army L-21A) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18-135 (Army L-21B) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18A-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-125 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18AS-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-105 (Special) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-125 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-135 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-18S-150 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-19 (Army L-18C) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - Piper Aircraft Inc. PA-19S ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) ## What the certificate says Some pages are OCR from the scanned FAA certificate. OCR can misread letters and numbers. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SAO2183AK This certificate issued to: Power Flow Systems, Inc. 1585 Aviation Center Parkway Hangar #804 Daytona Beach, FL 32114 Part 3 of the Civit Air Requlations. *Complete certification basis is specified in Aircraft Specification No. 1A2, Revision 37, dated september 4, 1996. Original Product Type Certificate Number 1A2 Make: Piper Model: See Continuation Sheet Page 3 of 3, for a list of approved airplane models. Description of Type Design Change: Fabrication of replacement engine exhaust system assembly (PIN PA1SESA) in accordance with Leading Edge Exhaust Systems, LLC, Drawing List No. LEESPA18-150- ESA-DL-1, Revision B, dated August 2, 2006, or later FAA approved revision, and installation in accordance with Leading Edge Exhaust Systems, LLC, Exhaust System Installation and Maintenance Instructions, Report No. LEESPA18EXH-INST-1, Revision G, dated November 2, 2005, or later FAA approved revision. 1) If the holder agrees to permit another person to use this certificate to alter one or more airplanes, then the holder must give that person written evidence of such permission in a form acceptable to the Administrator. suspended, revoked or a termination date is otherwise estublished by the Administrater of the Federal. Aviation Administration. Date of Application: November 3, 1999 Date Reissued: December 17, 2002; March 19, 2020; March 26, 2020 Date of Issuance: December 4, 2001 Dule umended: August 16, 2002; April 18, 2003; March 23, 2007; April 22, 2020 FEDERAL AVIATION By Direction of the Administrator TOMINSTRATO August A. Asay (Signature) Manager, Anchorage ACO Branch (Title) FAA Form 8110-2-1(10-69) Page 3 of 3 SA02183AK Date of Issuance: April 22, 2020 (Continued): 2) Approval of this design change is limited to airplanes of the following models that are equipped with FAA approved installations of Textron Lycoming O-320 models series engines having a compression ratio of 7.0:1 and a rated power of 150 horsepower for all operations, only PA-18, PA-18-S, PA-18-105 (Special), PA-18S-105 (Special), PA-18A, PA-18A-135 (Army L-21A), PA-15S-125, PA-18AS-125, PA-18-135 (Army L-21B), PA-18A-135, PA-18S-135, PA-18AS-135, PA-18-150, PA-18A-150, PA-18S-150, PA-18AS-150, PA-19 (Army L-18C), and PA-19S 3) This design change is not eligible for installation on airplanes equipped with 160 horsepower or 180 horsepower engines. 4) The installer may not determine the compatibility of this design change with the installation of any engine orther than a Textron Lycoming O-320 model series engine having a compression ratio of 7.0:1 and rated power of 150 horsepower for all operations. The installer must determine the compatibility of this design change with any other previously approved modifications. 5) FAA approved Instructions for Continued Airworthiness (ICA) consisting of Pages 12 and 13 of Leading Edge Exhaust Systems, LLC, Installation and Maintenance Instructions, Report No. LEESPA18EXH-INST-1, Revision G, dated November 2, 2005, or later FAA accepted revision, is a required part of this installation. - END - ## Every issue (1) - April 22, 2020: Amended, Current. [certificate](https://openairdocs.org/files/sha256/cc/5a/cc5ac7a441b3af7f18e28f5e28666e8ca48db137212dab2bdb04423775457d09) --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.