# STC SA4-180 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: FTG, Inc., United States - Description: Installation of VIP P/N 101-78 engine mounts. - Applied: February 20, 1957 - Status date: May 13, 2022 - Product: Aircraft, Rotorcraft - Certification basis: Part 21 - Data sheets: [TCDS H-2](https://openairdocs.org/tcds/H-2) - Certificate PDF: https://openairdocs.org/files/sha256/13/94/1394bbe1f34b676b753dee13630ffee8347d46ad0fae5d379d9d9e464dfdadad - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID114446504420230110153545.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4-180 ## ADs that name it (0) None. ## Approved models (1) - Sikorsky Aircraft Corporation S-51 ([TCDS H-2](https://openairdocs.org/tcds/H-2)) ## 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 Number: SA4-180 FAA Form 8110-2 (4/22) SUPERSEDES PREVIOUS EDITION Page 1 of 2 Cert ifies that the change in the type design for the following product with the limitations and conditions therefore as specified hereon meets the airworthiness requirements of Part 6 of the Federal Aviation Regulations. Des cription of Type Design Change: Installation of VIP Part No. 101-78 engine mounts. (Replaces MB Part No. 100878 engine mount.) Limita tions and Conditions: This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of these other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. This ce rtificate and the supporting data which is the basis for approval shall remain in effect until surrendered, suspended, revoked, or a termination date is otherwise established by the Administrator of the Federal Aviation Administration. This certificate issued to: FTG, Inc. 12750 Center Court Drive S Suite 280 Cerritos, CA 90703 Original Product Type Certificate Number: H-2 Make: Sirkorsky Model: S-51 Date of Application: February 20, 1957 Date Reissued: Aug. 15, 1986; Sept. 16, 1986; May 13, 2022 Date of Issuance: February 25, 1957 Date Amended: April 6, 1964 By Direction of the Administrator Signature: Title: Aviation Safety Manager, Technical & Administrative Support Section, Los Angeles ACO Branch United States of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Number: SA4-180 This certificate may be transferred or made available to third persons by licensing agreements in accordance with 14 CFR 21. 47. FAA Form 8110-2 (4/22) SUPERSEDES PREVIOUS EDITION Page 2 of 2 ## Every issue (1) - May 13, 2022: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/13/94/1394bbe1f34b676b753dee13630ffee8347d46ad0fae5d379d9d9e464dfdadad) --- 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.