# STC SA4-524 - Type: Supplemental type certificate - Status: Current, Reissued - Holder: FTG, Inc., United States - Description: Installation of VIP P/N 10601 engine mount core. - Applied: May 22, 1958 - Status date: May 13, 2022 - Product: Aircraft, Large Multi-Engine - Certification basis: Part 21 - Data sheets: [TCDS A-772](https://openairdocs.org/tcds/A-772), TCDS LTC-13 - Certificate PDF: https://openairdocs.org/files/sha256/20/57/2057bf30c9067bfabcd5a9602ffdf4009428ccd360f8d29892a86127a05d21cb - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID100692829820230110165149.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA4-524 ## ADs that name it (0) None. ## Approved models (5) - Curtiss-Wright Corporation Army C-46A ([TCDS A-772](https://openairdocs.org/tcds/A-772)) - Curtiss-Wright Corporation Army C-46D ([TCDS A-772](https://openairdocs.org/tcds/A-772)) - Curtiss-Wright Corporation Army C-46E ([TCDS A-772](https://openairdocs.org/tcds/A-772)) - Curtiss-Wright Corporation Army C-46F ([TCDS A-772](https://openairdocs.org/tcds/A-772)) - Lockheed Aircraft Corporation Navy PV-1 (TCDS LTC-13) ## 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: SA4-524 The STC’ s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property of the STC holder. FAA Form 8110-2 (4/22) SUPERSEDES PREVIOUS EDITION Page 1 of 2 Part 9&3 of the Federal Aviation Regulations. Description of Type Design Change: Installation of VIP Part No. 106-1 engine mount core (interchangeable with P&W core No. 39669 and 45355 as required in 49058 vibration isolator assembly and Lord MR37-1, MR36-1 and MR36-1A cores required in MR36-SA vibration isolator assembly). For installation on P&W R-2800 series engines approved by appropriate FAA aircraft specification. Limitations 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 certificate issued to: FTG, Inc. 12750 Center Court Drive S Suite 280 Cerritos, CA 90703 Original Product Type Certificate Number: LTC AL-13 A-772, P-786, A-789 & A-808 Make: Lockheed Curtiss-Wright Model: PV-1 C46A, C46D, C46E, & C46F Date of Application: May 22, 1958 Date Reissued: Aug.15,1986; Sept.16,1986; May 13, 2022 Date of Issuance: June 10, 1958 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: SA4-524 The STC’ s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property of the STC holder. 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/sha256/20/57/2057bf30c9067bfabcd5a9602ffdf4009428ccd360f8d29892a86127a05d21cb) --- 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.