# STC SA1399SO - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Saf-Air Products Inc., United States - Description: Remove drain plug, Cessna Part Number MS20913-10 or MS20913-1D, from the fuel selector valve, and replace with CAV-110D (MT-1075) or CAV-110H-4D (CM-1075) - Applied: September 20, 1982 - Status date: September 28, 2020 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A17](https://openairdocs.org/tcds/3A17) - Certificate PDF: https://openairdocs.org/files/sha256/e7/3a/e73aaced7faf5d8a5ca6dd8120ab8c9adf25b5472b89a6bc1c1eb3d4c3afc872 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/13BF1D9D4BBE4EE0862585FB003E4913.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA1399SO ## ADs that name it (0) None. ## Approved models (4) - The Cessna Aircraft Company 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - The Cessna Aircraft Company 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - The Cessna Aircraft Company 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - The Cessna Aircraft Company 175C ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) ## 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 AviationAdministration Supplemental Type Certificate Number: _S_A_1_3_9_9_S_O This certificate issued to: Saf-Air Products, Inc. 32839 Manor Park Drive Garden City, MI 48135 Part 3 of -C-iv-i-l A-_ir_R_e_g_ul_a_ti_on_s . Original Product rtype Certificate ']{um6er: 3A17 Make: Cessna Model: *See Page 3 Description of Type Design Change: Remove drain plug, Cessna Part Number MS20913-10 or MS20913-1D, from the fuel selector valve, and replace with CAV-110D (MT-1075) or CAV-110H-4D (CM-1075) in accordance with instructions dated January 12, 2004, or later FAA revision . This approval should not be extended to other airplanes of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other p reviously approved modifications will produce no adverse effect upon the airworthiness of that airplane. (See continuation sheet 3 of 3) Date of Application: _0_9_/2_0_/_1_9_8_2 Date Reissued: 09/18/1989, 09/28/2020 12/23/1982 Date Amended: 02/17/2004 Christina M. Underwood Title: Manager, Atlanta ACO Branch FAA Form 8110-2 (06/20) SUPERSEDES PREVIOUS EDITION Page 1 of 3_ United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate Number: _S_A_1_3_9_9_S_O Transfer Endorsement Transfer the ownership of Supplemental Type Certificate Number: _S_A_1_3_9_9S_O Saf-Air Products, Inc. 32839 Manor Park Drive Garden City, MI 48135 FAA Form 8110-2 (06/20) SUPERSEDES PREVIOUS EDITION Page 2 of _3 United States of America Department of Transportation Federal AviationAdministration Supplemental Type Certificate (Continuation Sheet) Number: _S_A_1_3_9_9_S_O Limitations and Conditions (Cont.) The following placard, located on the instrument panel in clear view of the pilot is required when the drain is installed: "This aircraft is equipped with a belly drain. Drain daily or before each flight," *Model: Serial Number Cessna 175 28700A, 55001 - 56238 175A 619, 56239 - 56777 175B 17556778 - 17557002 175C 17557003 - 17557119 Date of Issuance: 12/23/1982 -End- ## Every issue (2) - September 28, 2020: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e7/3a/e73aaced7faf5d8a5ca6dd8120ab8c9adf25b5472b89a6bc1c1eb3d4c3afc872) - February 17, 2004: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/f4/22/f422f3e41afb43fbb1a5806b7d58c58106b39a1e6604e54dd60d3de52be8d25d) --- 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.