# STC SA172NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Stene Aviation Inc, United States - Description: Installation of drooped type wing tips. - Applied: April 10, 1975 - Status date: April 1, 2016 - Product: Aircraft, Small Airplane - Certification basis: Part 21 - Data sheets: [TCDS 3A19](https://openairdocs.org/tcds/3A19), [TCDS A-799](https://openairdocs.org/tcds/A-799), [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS 5A6](https://openairdocs.org/tcds/5A6), [TCDS 3A13](https://openairdocs.org/tcds/3A13), [TCDS 3A24](https://openairdocs.org/tcds/3A24), [TCDS A9CE](https://openairdocs.org/tcds/A9CE), [TCDS A4CE](https://openairdocs.org/tcds/A4CE), [TCDS 3A21](https://openairdocs.org/tcds/3A21) - Certificate PDF: https://openairdocs.org/files/sha256/cd/47/cd475e279b3749826573bb92809bf743002b69c7e06a538f5dbfd3d64e262f96 - Approved model list and other attachments: [SA172NW_AML.pdf](https://openairdocs.org/files/sha256/20/86/2086a2266b86dd0a7b1856b86f4487f60ed76b5e17bcf1468acb9c925067b3bc) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/28B0D8319B73F55886257F88006A1308.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA172NW ## ADs that name it (0) None. ## Approved models (110, first 50) - Textron Aviation Inc. 150 ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150A ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150B ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150C ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150D ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150E ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150F ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150G ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150H ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150J ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150K ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150L ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 150M ([TCDS 3A19](https://openairdocs.org/tcds/3A19)) - Textron Aviation Inc. 170A ([TCDS A-799](https://openairdocs.org/tcds/A-799)) - Textron Aviation Inc. 170B ([TCDS A-799](https://openairdocs.org/tcds/A-799)) - Textron Aviation Inc. 172 ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172A ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172B ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - Textron Aviation Inc. 172C ([TCDS 3A12](https://openairdocs.org/tcds/3A12)) - 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. 175 ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - Textron Aviation Inc. 175A ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - Textron Aviation Inc. 175B ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - Textron Aviation Inc. 175C ([TCDS 3A17](https://openairdocs.org/tcds/3A17)) - Textron Aviation Inc. 180 ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180A ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180B ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180C ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180D ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180E ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180F ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180G ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 180H ([TCDS 5A6](https://openairdocs.org/tcds/5A6)) - Textron Aviation Inc. 182 ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182A ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182B ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182C ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182D ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182E ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182F ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182G ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182H ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) - Textron Aviation Inc. 182J ([TCDS 3A13](https://openairdocs.org/tcds/3A13)) All 110: https://openairdocs.org/stc/SA172NW/models.md ## 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. Number SA172NW This certificate, issued to Stene Aviation, Inc. 470 Regatta Road, Hangar 1 Polson, MT 59860 Part * of the * Regulations. Original ProductType Certificate Number: * See attached Federal Aviation Administration (FAA) Make: Approved Model List (AML) SA172NW for approved Model: aircraft models and applicable airworthiness regulations Description of the Type Design Change: Installation of drooped type wing tips in accordance with FAA Sealed Robert C. Cansdale Drawing No. R-18 and FAA-approved Installation Instructions Report No. R-19. NOTE: This installation is limited to those Cessna models listed on the AML SA172NW manufactured prior to 1972. .Limitations and Conditions: The approval of this change in type design applies basically to the model aircraft listed on AML SA172NW only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate, AML SA172NW, FAA Sealed Robert C. Cansdale Drawing No. R-18, and FAA-approved Installation Instructions Report No. R-19, must be maintained as part of the permanent records for the modified aircraft. 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. Date of application: April 10, 1975 Date reissued: January 29, 2016; April 1, 2016 Date of issuance: April 14, 1975 Date amended: (Signature) Manager, Seattle Aircraft Certification Office (Title) ### SA172NW_AML.pdf **FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA172NW FOR** INSTALLATION OF DROOPED TYPE WING TIPS ISSUE DATE: April 14, 1975 Page 1 of 1 **ITEM AIRCRAFT MAKE** **AIRCRAFT MODEL ORIGINAL** **TC NUMBER** **CERTIFICATION BASIS** **FOR ALTERATION** **FAA SEALED** **DRAWINGS/DRAWING LIST** AML REV DATE Drawing Revision* 1. Cessna 150, 150A, 150B, 150C, 150D, 150E, 150F, 150G, 150H, 150J, 150K, 150L, A150L, 150M, A150M 3A19 CAR 3, dated 5/15/56, as amended by 3-4 R-18 NC 1/29/16 2. Cessna 170A, 170B A-799 CAR 3, dated 12/15/46 R-18 NC 1/29/16 3. Cessna 172, 172A, 172B, 172C, 172D, 172E, 172F, 172G, 172H, 172I, 172K, 172L 3A12 CAR 3, dated 11/1/49, as amended by 3-1 thru 3-12 R-18 NC 1/29/16 4. Cessna 175, 175A, 175B, 175C 3A17 CAR 3, dated 5/15/56 R-18 NC 1/29/16 5. Cessna 180, 180A, 180B, 180C, 180D, 180E, 180F, 180G, 180H 5A6 CAR 3, dated 11/1/49 R-18 NC 1/29/16 6. Cessna 182, 182A, 182B, 182C, 182D, 182E, 182F, 182G, 182H, 182J, 182K, 182L, 182M, 182N 3A13 CAR 3, dated 11/1/49, as amended by 3-1 thru 3-12 R-18 NC 1/29/16 7. Cessna 185, 185A, 185B, 185C, 185D, 185E, A185E 3A24 CAR 3, see Type Certificate Data Sheet 3A24 for amendments R-18 NC 1/29/16 8. Cessna 188, 188A, A188, A188A A9CE Part 21 & 23, dated 2/1/65 R-18 NC 1/29/16 9. Cessna 206, P206, P206A, P206B, P206C, P206D, P206E, U206, U206A, U206B, U206C, U206D, U206E, U206F, TP206A, TP206B, TP206C, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F A4CE CAR 3, dated 5/15/56, as amended by 3-1 thru 3-8 R-18 NC 1/29/16 10. Cessna 210, 210A, 210B, 210C, 210D, 210E, 210F, 210G, 210H, 210J, 210K, T210F, T210G, T210H, T210J, T210K, (205) 210-5, (205A) 210-5A 3A21 CAR 3, see Type Certificate Data Sheet 3A21 for amendments R-18 NC 1/29/16 * Or later FAA Approved Revision FAA Approved: Manager, Seattle Aircraft Certification Office AMENDED: REISSUED: January 29, 2016 ## Every issue (2) - April 1, 2016: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cd/47/cd475e279b3749826573bb92809bf743002b69c7e06a538f5dbfd3d64e262f96), [SA172NW_AML.pdf](https://openairdocs.org/files/sha256/20/86/2086a2266b86dd0a7b1856b86f4487f60ed76b5e17bcf1468acb9c925067b3bc) - January 29, 2016: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/92/ea/92eae006282cea9cf0bcbdf6c03bcb3b5374c15a21700d9a7872a801179e5067), [SA172NW_AML.pdf](https://openairdocs.org/files/sha256/20/86/2086a2266b86dd0a7b1856b86f4487f60ed76b5e17bcf1468acb9c925067b3bc) --- 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.