# STC SA2375SW - Type: Supplemental type certificate - Status: Current, Amended - Holder: RAM Aircraft Limited Partnership, United States - Description: Installation of Lycoming Engines - Applied: September 7, 1976 - Status date: May 11, 2020 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12) - Certificate PDF: https://openairdocs.org/files/sha256/d8/d2/d8d2c90eedeee0c2e0609910b9917051c994869c75c13e0e322fdd004d9dd29e - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/EC0B2CDF92B49038862585BA003F9579.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA2375SW ## ADs that name it (0) None. ## Approved models (10) - The Cessna Aircraft Company 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - The Cessna Aircraft Company 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) ## 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. Part 3 of the Civil Air Regulations Original Product – Type Certificate Number: Make: By D irection of the Administrator Signature Title The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the prop erty of the STC holder. FAA Form 8110-2 (7/19) Page 1 of Cessna 172D; 172E; 172F; 172G; 172H; 172I; 172K; 172L; 172M; 172N 3A12 06/10/1977; 03/30/1978; 11/09/1978; 01/26/1979; 02/03/1981; 09/28/1981; 11/05/1981; 08/28/1987; 05/11/2020 Jim Grigg Manager, Fort Worth ACO Branch Compliance & Airworthiness Division Aircraft Certification Service 3 09/07/1976 11/01/1976 10/08/2001; 09/20/2002; 05/12/2008; 08/25/2008 RAM Aircraft L.P. 7505 Karl May Dr Waco, TX 76708 (See continuation sheet 3 of 3) Installation of Lycoming 0-320-D2G, 0-320-D2J, or 0-320-E2D (as modified by STC SE3692SW-D) engine rated for 160 h.p. take-off and 150 h.p. METO for models 1721, 172K, 172L, and 172M according to RAM Dwg. Rl 720 I Rev. F dated 12/9/86; or installation of Lycoming 0-320-D2G, 0-320-D2J, or 0-320-E2D (as modified by STC SE3692SW-D) engine rated for J 60 h.p. take-off and 145 h.p. METO for models 172D, l 72E, l 72F, 172G, and 172H according to RAM Dwg. 17202, Rev. K dated 12/9/86; or installation of Lycoming 0-320-D2G, 0-320-D2J or 0-320-E2D (as modified by STC SE3692SW-D) engine (160 h.p., 2700 r.p.m) in model 172N according to RAM Dwg. 17203, Rev. L dated 12/9/86; or later FAA approved revision. SA2375SW United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate FAA Form 8110-2 (7/19) Page 2 of To (Name and address of transferee) From (Name and address of grantor) Extent of Authority (if licensing agreement): This certificate may be transferred or made available to third persons by licensing agreements in accordance with 14 CFR 21. 47. 3 SA2375SW FAA Form 8110-2 (7/19) Page of The STC’s supporting documentation (drawings, instructions, specifications, flight manual supplements, etc.) is the property of the STC h older. 3 3 SA2375SW 1. The following appropriate FAA Approved Manual is required: Cessna Models Airplane Flight Airplane Supplemental Airplane Supplemental Manual for Land Flight Manual for Land Flight Manual for with Lycoming plane of Floatplane Landplane or Float- 0-320-D2G with Lycoming plane with Lycoming engine 0-320-D2G engine 0-320-D2J engine or 0-320-E2D (as modified by STC SE3692SW-D) 1721, 172K November 1, 1976 January 26, 1979 November 5, 1981 172L, 172M or or or June 10, 1977 May 1, 1981 August 27, 1987 or March 30, 1978 172D, 172E June 9, 1977 January 25, 1979 November 5, 1981 172F, 172G, or or or 172I-H March 29, 1978 April 30, 1981 August 27, 1987 172N AFMS #1177 AFMS #1177 AFMS #1177 2. For additional limitations see the applicable flight manual listed above. 3. Compatibility of this design change with previously approved modifications must be determined by the installer. 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. ---------------------------------------------------- -END------------------------------------------------- ## Every issue (2) - May 11, 2020: Amended, Current. [certificate](https://openairdocs.org/files/sha256/d8/d2/d8d2c90eedeee0c2e0609910b9917051c994869c75c13e0e322fdd004d9dd29e) - September 20, 2002: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/67/8f/678fcda9f5e57fec5f5ebd47db72cf69682c788d537ff86541a2fa3475edf494) --- 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.