# STC SA2375SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: RAM Aircraft Limited Partnership, USA
- Description: 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 7201 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 160 h.p. take-off and 145 h.p. METO for models 172D, 172E, 172F, 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.
- Applied: September 7, 1976
- Status date: August 25, 2008
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12)
- Certificate PDF: https://openairdocs.org/files/sha256/35/88/35886303d21147367c0a69fe9016e50c20a3181f6ed4ae04e56cce4126286df4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID157302319020230417213854.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2375SW-D

## ADs that name it (0)

None.

## Approved models (10)

- Textron Aviation Inc. 172D ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172E ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172F (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172G ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172H (USAF T-41A) ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172I ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172K ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172L ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA23155W-D This certificate issued to: RAM Aircraft, Limited Partnership 7505 Karl May Drive Waco, IX 76708 Part 3 of the Civil Air Poegulations.

Original Product Type Certificate Number: 3A12 Make: Cessna Model: 172D; 172E; 172F; 172G; 172H; 1721; 172K;

172L; 172M; 172N Description of Type Design Change:

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. R17201 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 160 h.p. take-off and 145 h.p. METO for models 172D, 172E, 172F, 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. I dated 12/9/86; or later FAA approved revision.

Date of Application: September 07, 1976 Date of Issuance: November 01, 1976

FEDERAL AVIATION Date Reissued: October 08, 2001, September 20, 2002;

May 12, 2008, August 25, 2008 Date Amended: June 10, 1977; March 30, 1978;

November 9, 1978; January 26, 1979; February 3, 1981;

September 28, 1981; November 5, 1981; August 28, 1987 Revision 8 By Direction of the Administrator (Signature) TOMNISTRATIO Terry L. Bowden DAS administrator DAS-700100-SW RAM Aircraft LP Waco, Texas (Title)

Number: SA23755W-D Date of Issuance: November 01, 1976 Amended Date: August 28, 1987 Reissuance Date: August 25, 2008 Limitations and Conditions: (Continued):

1. The following appropriate FAA Approved Manual is required:

Cessna Models Airport Flight Airplane Supplemental Airplane Supplemental Manual for Landplane Flight Manual for Land- Flight Manual for with Lycoming 0-320-D2G plane of Floatplane Landplane or Floatengine with Lycoming 0-320-D2G plane with Lycoming 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 172H March 29, 1978 April 30, 1981 August 27, 1987 172N Not required Not required Not required

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-

FAA Form 8110-2-1(10-69) Page 3 of 3

## Every issue (2)

- August 25, 2008: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/35/88/35886303d21147367c0a69fe9016e50c20a3181f6ed4ae04e56cce4126286df4)
- August 25, 2008: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/ad/b0/adb020130479c5b525b1835263af8f1e85a141b68a4e0a2f9d843bc0c991a912)

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