# STC SA25CH - Type: Supplemental type certificate - Status: Current, Reissued - Holder: CE2 Aviation, LLC, United States - Description: Installation of Sensenich propeller model W80DM. - Applied: October 9, 1992 - Status date: May 21, 2018 - Product: Aircraft, Single-Engine - Certification basis: Part 21 - Data sheets: [TCDS 1A2](https://openairdocs.org/tcds/1A2) - Certificate PDF: https://openairdocs.org/files/sha256/a5/fb/a5fb4f973825f1cefe482e0b8cdb67276ec6649979af4efeef88474c95eb390c - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/482CF3098F6DF930862582B900518578.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA25CH ## ADs that name it (0) None. ## Approved models (16) - The New Piper Aircraft Inc. PA-18 ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18"105" (Special) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18-"125" (Army L-21A) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18-"150" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18A ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18A-"135" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18A-"150" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18AS-"135" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18AS-"150" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18S ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18S-"105" (Special) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18S-"125" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18S-"135" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-18S-"150" ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-19 (Army L-18C) ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) - The New Piper Aircraft Inc. PA-19S ([TCDS 1A2](https://openairdocs.org/tcds/1A2)) ## What the certificate says Read from the PDF's text layer, without the form's printed wording; the layout is lost and the order can differ. The PDF is the record. 3 Civil Air Installation of Sensenich Propeller Model W80DM in accordance with “Sensenich Propeller Co., Wood Propellers: Installation Operation, and Maintenance” instructions and Aircraft Restoration Supplies “W80DM Parts List” , both FAA Approved December 30, 1992, or later FAA approved revision. 1) This approval should not be extended to other aircraft of this model 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 effect upon the airworthiness of that aircraft. 1A2 Piper May 21, 2018 (Signature) August A. Asay Manager, Anchorage ACO Branch (Title) CE2 Aviation, LLC 3751 N Crossover Dr Wasilla, AK 99623 October 9, 1992 January 4, 1993 C:\Users\CE115NJR\Documents\Jason Raymer\SA176GL and SA25CH\SA25CH (2018).doc PA-18, PA-18S, PA-18 “105”, PA-18S “105”, PA-18A, PA-18 “125”, PA-18S “125”, PA-18AS ”125”, PA-18 “135”, PA-18A “135”, PA-18S “135”, PA-18AS “135”, PA-18 “150”, PA-18A “150”, PA-18S “150”, PA-18AS “150”, PA-19, PA-19S (See Aircraft Specification No. 1A2 for the complete certification basis) **CONCURRENCES** **ROUTING SYMBOL AIR-770** **INITIALS/SIG JKR DATE 06/19/18** **ROUTING SYMBOL AIR-770** **INITIALS/SIG** **DATE** **ROUTING SYMBOL AIR-770** **INITIALS/SIG** **DATE** FAA Form 8110-2-1(10-69) Page 3 of 4 FAA Form 8110-2-1(10-69) Page 3 of 3 May 21, 2018 SA25CH Limitations and Conditions (Cont.): 2) This modification is limited to Piper PA-18 and PA-19 series aircraft in which a Lycoming 0-290-D, -D2A; or 0-320 Series engine has been installed. However, this STC only approves the installation of the Sensenich propeller model W80DM onto the Piper PA-18 and PA-19 series aircraft. A separate FAA approval (eg. FAA Form 337, STC, etc.) must be granted to approve the installation of these engines onto these aircraft. 3) FAA approved Airplane Flight Manual Supplement, dated December 30, 1992, or later FAA approved revisions are required. …END… ## Every issue (1) - May 21, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/a5/fb/a5fb4f973825f1cefe482e0b8cdb67276ec6649979af4efeef88474c95eb390c) --- 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.