# STC SA4136NM - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Air Mods NW, United States - Description: Installation of one of the following optional oil cooler: Stewart Warner 10578B, 10568A(C), 8046R, Harrison 8526250. - Applied: September 21, 1987 - Status date: August 20, 2019 - Product: Aircraft, Small Airplane - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A18SO](https://openairdocs.org/tcds/A18SO) - Certificate PDF: https://openairdocs.org/files/sha256/67/ad/67ad55f82b560b8aa45de9bfedba8f19b34e8d0af71b9d132c574972f31d7bb1 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/86D607C49FCA96DB862585DE0039BA2E.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA4136NM ## ADs that name it (0) None. ## Approved models (1) - Piper Aircraft Inc. PA-38-112 ([TCDS A18SO](https://openairdocs.org/tcds/A18SO)) ## 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. United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate This certificate has been reissued to replace the original certificate reported lost. Number SA4136NM This certificate, issued to Air Mods N.W. 1424 Ridge Ave Snohomish, WA 98290 Part 23 of the Federal Air Regulation,effective February 14, 1975 Original ProductType Certificate Number: A18S0 Make: Piper Model: PA-38-112 Description of the Type Design Change: Installation of one of the optional oil coolers: Stewart Warner 10578B Stewart Warner 10568A (C) Stewart Warner 8406R Harrison 8526250 In accordance with Air Mods N.W. Installation Instructions KD 138, dated September 13, 1987. Limitations and Conditions: Approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this chang e and any of those other previously approved modifications, including changes in type design, will introduce no adverse effects upon the airworthiness of that aircraft. A copy of this certificate must be maintained as part of the permanent records for the modified 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 Date of application: September 21, 1987 Date reissued: August 20, 2019 Date of issuance: October 30, 1987 Date amended: **FAA FORM 8110-2 (5/14) PAGE 1 OF 2 PAGE** (Signature) Manager, Seattle ACO Branch (Title) Transfer the ownership of Supplemental Type Certificate Number to (Name of Transferee) (Address of Transferee) (Number and Street) (City, State, and ZIP Code) from (Name of Grantor) (Print or Type) (Address of Grantor) (Number and Street) (City, State, and ZIP Code) Signature of Grantor (In Ink): U.S. GPO: 1987-763-289 ## Every issue (2) - August 20, 2019: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/67/ad/67ad55f82b560b8aa45de9bfedba8f19b34e8d0af71b9d132c574972f31d7bb1) - October 30, 1987: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/af/77/af77e083347cc03c8c22b1ca49feb15c161da5402d92d745ec84bc00201b62a5) --- 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.