# STC SE09896AC - Type: Supplemental type certificate - Status: Current, Issued - Holder: General Aviation Modifications Inc., United States - Description: Installation of Taper Fin Cylinders - Applied: October 1, 2018 - Status date: March 12, 2019 - Product: Engine - Certification basis: Part 21, Part 33 - Data sheets: [TCDS E3SO](https://openairdocs.org/tcds/E3SO) - Certificate PDF: https://openairdocs.org/files/sha256/1b/25/1b253b5fa292e9cf176a0409a5d451cb15328ca060c3d3a098ebc4f9e6ed5ca5 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0766A169BEBAC03A8625857B00336744.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SE09896AC ## ADs that name it (0) None. ## Approved models (1) - Continental Aerospace Technologies Inc. IO-550-B ([TCDS E3SO](https://openairdocs.org/tcds/E3SO)) ## 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 FAA Form 8110-2 (5/14) Page 1 of 3 This certificate issued to: Number: SE09896AC General Aviation Modifications, Inc. 2800 Airport Road, Hangar A Ada, OK 74820 Part 33 of the Federal Aviation Regulations Original Product – Type Certificate Number: E3SO Make: Continental Motors Inc. Model: IO-550-B Description of Type Design Change: Installation of Taper Fin Cylinders on Continental Motors Inc. IO-550-B e ngines in accordance with General Aviation Modifications, Inc. Report 05-6 960001, Rev. IR, dated September 28, 2018, or later FAA approved revision. Instructions for Continued Airworthiness, General Aviation Modifications, Inc. Report 05-6960002, Rev. IR, dated September 28, 2018 are required. Li mitations and Conditions: 1. Approv al of this change in type design applies to the above model engine only. This approval should not be extended to engines of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon t he airworthiness of that engine. 2. A copy of this certificate must be maintained as a part of the permanent records of this modified engine. Date Reissued: Date of Application: October 1, 2018 Date of Issuance: March 12, 2019 Date Amended: By Direction of the Administrator Signature Jim Grigg Title: Manager, Fort Worth ACO Branch Compliance & Airworthiness Division Aircraft Certification Se rvice United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate FAA Form 8110-2 (5/14) Page 2 of 3 Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: SE09896AC To (Name and address of transferee) From (Name and address of grantor) Extent of Authority (if licensing agreement): Possession of this Supplemental T ype Certificate (STC) document by persons other than the STC holder does not constitute rights to the design data nor to alter an aircraft, aircraft engine, or propeller. United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SE09896AC FAA Form 8110-2 (5/14) Page 3 of 3 Certification Basis: The type certification basis for Continental IO-550-B engine is shown on TCDS E3SO for parts not changed or not affected by the change. The certification basis for parts changed or affected by the change since the reference date of application, September 24, 2018, is based upon Part 33 of the Feder al Aviation Regulations, effective February 1, 1965, as amended through Amendment, 33-8, dated May 2, 1977: Regulations at amendment no amendment: 33.21, 33.33, 33.37, 33.39 Regulations at amendment 33-9: 33.4, 33 Subpart D Regulations at amendment 33-10: 33.15, 33.23, 33.35(a0, (b), (c), (d) Regulations at amendment 33-26: 33.5 Regulations at amendment 33-28: 33.19(b) Regulations at amendment 33-29: 33.17(a), (b), (c), (e), (f) Regulations at amendment 33-30: 33.7(a), (b)(1)(i)(ii)(iii), (b)(2), (b)(3), (b)(4)(i)(ii) ----------------------------------------END---------------------------------------- ## Every issue (1) - March 12, 2019: Issued, Current. [certificate](https://openairdocs.org/files/sha256/1b/25/1b253b5fa292e9cf176a0409a5d451cb15328ca060c3d3a098ebc4f9e6ed5ca5) --- 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.