# STC SA2256WE

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Stene Aviation Inc, United States
- Description: Installation of leading edge "CUFF" and aileron gap covers on each wing
- Applied: April 23, 1970
- Status date: November 2, 2020
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21, Part 23
- Data sheets: [TCDS 3A12](https://openairdocs.org/tcds/3A12), [TCDS 3A17](https://openairdocs.org/tcds/3A17), [TCDS 3A21](https://openairdocs.org/tcds/3A21), [TCDS 3A24](https://openairdocs.org/tcds/3A24), [TCDS 5A6](https://openairdocs.org/tcds/5A6), [TCDS A-799](https://openairdocs.org/tcds/A-799), [TCDS A16CE](https://openairdocs.org/tcds/A16CE), [TCDS A4CE](https://openairdocs.org/tcds/A4CE)
- Certificate PDF: https://openairdocs.org/files/sha256/e9/9b/e99b946396866455f6c878c313e669d0b545882c7ed3a84943657d15b148f4b7
- Approved model list and other attachments: [SA2256WE_AML.pdf](https://openairdocs.org/files/sha256/bd/16/bd16bf07924c18a25fbf64fcc644d315fddfeac225ba1a3dab1f940308b5af1b)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3B55897CD6F1432A86258618005823E2.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2256WE

## ADs that name it (0)

None.

## Approved models (78, first 50)

- 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. 172M ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172N ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172P ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172Q ([TCDS 3A12](https://openairdocs.org/tcds/3A12))
- Textron Aviation Inc. 172RG ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- 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. 180J ([TCDS 5A6](https://openairdocs.org/tcds/5A6))
- Textron Aviation Inc. 180K ([TCDS 5A6](https://openairdocs.org/tcds/5A6))
- Textron Aviation Inc. 185 ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 185A ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 185B ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 185C ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 185D ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. 206 ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. 206H ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. 207 ([TCDS A16CE](https://openairdocs.org/tcds/A16CE))
- Textron Aviation Inc. 207A ([TCDS A16CE](https://openairdocs.org/tcds/A16CE))
- Textron Aviation Inc. 210-5 (205) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210-5A (205A) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. A185E ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. A185F ([TCDS 3A24](https://openairdocs.org/tcds/3A24))
- Textron Aviation Inc. P172D ([TCDS 3A17](https://openairdocs.org/tcds/3A17))
- Textron Aviation Inc. P206 ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206A ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))

All 78: https://openairdocs.org/stc/SA2256WE/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.

Part of the Original Product – Type Certificate Number: Make:

By Direction 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 SA2256WE Stene Aviation, Inc.

470 Regatta Road PO Box 700 Polson, MT 59860-0700 * * Textron Aviation, Inc.

* See attached Federal Aviation Administration (FAA) Approved Model List (AML) SA2256WE for approved aircraft models and applicable airworthiness regulations.

Installation of leading edge “cuff” and aileron gap seals on each wing in accordance with Installation Document SASP-Install Revision G, dated 12/5/2013 (or later FAA accepted revision), and Master Drawing List (MDL) SASP-1 Revision B dated May 19, 2020 (or later FAA approved revision). Maintained in accordance with the Instructions for Continued Airworthiness (ICA) as listed on the AML. Operated in accordance with the Airplane Flight Manual Supplement (AFMS) as listed on the AML.

Approval of this change in type design applies to the aircraft listed on AML SA2256WE only. This approval should not be extended to other aircraft of these models on which other previously approved modifications are incorporated unless it is determined by the installer that the relationship between this change and other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this certificate, AML SA2256WE, and the MDL, ICA, and AFMS documents listed in AML SA2256WE, 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.

04/23/1970 March 22, 1972, February 17, 1977, May 6, 2005 March 22, 1972, August 31, 1977, April 29, 1980, January 21, 1987, December 23, 2015, November 2, 2020 10/14/1970 For Manager, Seattle ACO Branch 1

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.

SA2256WE 1

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.

SA2256WE 1

### SA2256WE_AML.pdf

FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA2256WE FOR Installation of leading edge “cuff” and aileron gap seals on each wing

Original Issue Date: October 14, 1970 Amended Date: November 2, 2020

Page 1 of 3

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION BASIS**

**FOR ALTERATION**

**FAA APPROVED**

**AIRCRAFT FLIGHT**

**MANUAL SUPPLEMENT**

**FAA ACCEPTED**

**INSTRUCTIONS FOR**

**CONTINUED**

AIRWORTHINESS Number Revision* Number Revision*

1. Textron Aviation, Inc.

180, 180A–180H 5A6 Civil Air Regulations Part 3 (CAR 3) Dated November 1, 1949, as amended by 3-1 through 3-12 See NOTE 1 See NOTE 2

2. Textron Aviation, Inc.

210-5, 210-5A 3A21 CAR 3 Dated May 15, 1956, with no amendments

See NOTE 1 See NOTE 2

3. Textron Aviation, Inc.

172, 172A–172L 3A12 CAR 3 Dated November 1, 1949, as amended by 3-1 through 3-12 See NOTE 1 See NOTE 2

4. Textron Aviation, Inc.

175, 175A 3A17 CAR 3 Dated May 15, 1956, with no amendments

See NOTE 1 See NOTE 2

5. Textron Aviation, Inc.

172M, 172N, 172P, & 172Q 3A12 CAR 3 Dated November 1, 1949, as amended by 3-1 through 3-12 See NOTE 1 See NOTE 2

6. Textron Aviation, Inc.

R172K 3A17 CAR 3 Dated May 15, 1956, with no amendments

See NOTE 1 See NOTE 2

7. Textron Aviation, Inc.

180J, 180K 5A6 CAR 3 dated November 1, 1949, as amended by 3-1 through 3-2 See NOTE 1 See NOTE 2

8. Textron Aviation, Inc.

185, 185A–185E, A185E, A185F 3A24 CAR 3 Dated May 15, 1956, as amended by 3-1 through 3-5 See NOTE 1 See NOTE 2

FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA2256WE FOR Installation of leading edge “cuff” and aileron gap seals on each wing

Original Issue Date: October 14, 1970 Amended Date: November 2, 2020

Page 2 of 3

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION BASIS**

**FOR ALTERATION**

**FAA APPROVED**

**AIRCRAFT FLIGHT**

**MANUAL SUPPLEMENT**

**FAA ACCEPTED**

**INSTRUCTIONS FOR**

**CONTINUED**

AIRWORTHINESS Number Revision* Number Revision*

9. Textron Aviation, Inc.

206, P206, P206A–P206E, U206, U206A-U206G, TP206A- TP206E, TU206A- TU206G A4CE CAR 3 Dated May 15, 1956, as amended by 3-1 through 3-8.

See NOTE 1 See NOTE 2

10. Textron Aviation, Inc.

170B A-799 CAR 3 Dated November 1, 1949, as amended by 3-1 and 3-2 See NOTE 1 See NOTE 2

11. Textron Aviation, Inc.

206H A4CE Part 23 of the Federal Aviation Regulations (FAR 23) as amended by 23-1 through 23-45 SAT206HAFM Original See NOTE 2

12. Textron Aviation, Inc.

T206H A4CE FAR 23 as amended by 23-1 through 23-45

SAT206HAFM Original See NOTE 2

13. Textron Aviation, Inc.

207, 207A, T207, T207A A16CE FAR 23 as amended by 23-1 through 23-6

See NOTE 1 See NOTE 2

14. Textron Aviation, Inc.

175B, 175C 3A17 CAR 3 Dated May 15, 1956, with no amendments

See NOTE 1 See NOTE 2

FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA2256WE FOR Installation of leading edge “cuff” and aileron gap seals on each wing

Original Issue Date: October 14, 1970 Amended Date: November 2, 2020

Page 3 of 3

**ITEM AIRCRAFT MAKE**

**AIRCRAFT MODEL**

**ORIGINAL TC NUMBER**

**CERTIFICATION BASIS**

**FOR ALTERATION**

**FAA APPROVED**

**AIRCRAFT FLIGHT**

**MANUAL SUPPLEMENT**

**FAA ACCEPTED**

**INSTRUCTIONS FOR**

**CONTINUED**

AIRWORTHINESS Number Revision* Number Revision*

15. Textron Aviation, Inc.

172RG 3A17 CAR 3 Dated May 15, 1956, with no amendments

SA172RGAFM Original SA172RGICA N/C

16. Textron Aviation, Inc.

P172D 3A17 CAR 3 Dated May 15, 1956, with no amendments

**SAP172DAFM IR**

**SAP172DICA A**

* Or later FAA Approved Revision NOTE 1: There is no change to the operating procedures, limitations, or performance for the airplane. The existing flight m anual still applies.

NOTE 2: There is no change to the instructions for continued airworthiness (ICA) for the airplane. The existing ICA still applies.

FAA Approved:

For Manager, Seattle ACO Branch AMENDED: 3/22/1972; 8/31/1977; 4/29/1980; 1/21/1987;

12/23/2015, 11/2//2020

REISSUED: 3/22/1972; 2/17/1977; 5/6/2005

## Every issue (4)

- November 2, 2020: Amended, Current. [certificate](https://openairdocs.org/files/sha256/e9/9b/e99b946396866455f6c878c313e669d0b545882c7ed3a84943657d15b148f4b7), [SA2256WE_AML.pdf](https://openairdocs.org/files/sha256/bd/16/bd16bf07924c18a25fbf64fcc644d315fddfeac225ba1a3dab1f940308b5af1b)
- December 23, 2015: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/40/35/4035dd76af864669766a18c01e57fa0d26aaaca6cb34b0c94e655f70e68686d1), [SA2256WE_AML.pdf](https://openairdocs.org/files/sha256/fc/c5/fcc5288bbfbe0754c11d72a6f5da2be71c20b215cf1f10c579f388935e173520)
- January 21, 2010: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f8/37/f837b43141a2d9651d55b5a6bd5aff6a4a7fb1ee4a9951d0326b65ce1956b1aa), [AML SA2256WE.pdf](https://openairdocs.org/files/sha256/cc/a4/cca480daaa2dd8a38d8f35c36efa86230ecf6a9a5c2fd30651b38ae849b6a998)
- May 6, 2005: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/f2/d7/f2d7c6fdf831382753baedc6288f087d8addc669e18bc585bbbe6ea2a54bbfa9), [SA2256WE.pdf](https://openairdocs.org/files/sha256/f8/37/f837b43141a2d9651d55b5a6bd5aff6a4a7fb1ee4a9951d0326b65ce1956b1aa)

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