# STC SA04211CH

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Western Skyways Aircraft Modifications Inc., United States
- Description: Installation of an engine modified per STC SE0417CH
- Applied: September 25, 2016
- Status date: August 20, 2025
- Product: Aircraft, Small Airplane
- Certification basis: Part 23
- Data sheets: [TCDS A4CE](https://openairdocs.org/tcds/A4CE), [TCDS A16CE](https://openairdocs.org/tcds/A16CE), [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/99/e1/99e1cdd3216e5c2fb9c7b62264b8a0b9828f0ab7b79689f240ced37c86c2823c
- Approved model list and other attachments: [SA04211CH_AML.pdf](https://openairdocs.org/files/sha256/98/73/9873830c01a2e51fc6f08f2e4b89ab339a1f59462fa2ede386b35996c123b91c), [SE0417CH.pdf](https://openairdocs.org/files/sha256/25/06/2506bd13fb197584f4fc057495551758fc2de261b4efb2ded4b7609e0f1e8872)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID196020277520250930165440.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA04211CH

## ADs that name it (0)

None.

## Approved models (50)

- Textron Aviation Inc. 206 ([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. 210D ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210E ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210R ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. P206 ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206A ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206B ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. P206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. T207 ([TCDS A16CE](https://openairdocs.org/tcds/A16CE))
- Textron Aviation Inc. T207A ([TCDS A16CE](https://openairdocs.org/tcds/A16CE))
- Textron Aviation Inc. T210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. TP206A ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TP206B ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TP206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TP206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TP206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206A ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206B ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. TU206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206 ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206A ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206B ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206C ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206D ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206E ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206F ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))
- Textron Aviation Inc. U206G ([TCDS A4CE](https://openairdocs.org/tcds/A4CE))

## 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.

SA04211CH Western Skyways Aircraft Modifications Inc.

333 West Boulevard, # 400 Rapid City, SD 57701 * * See AML SA04211CH See AML SA04211CH See AML SA04211CH

1. This conversion is to be performed per Master Data List MDL WS203001 for Cessna ()206() (TN), ()207()(TN) and ()210()(TN) Aircraft with TSIO-520-TN Mod (ACFGHJLMR) or TSIO-550-TN Mod (FL) Installed, revision D, dated June 17, 2017 or later FAA approved revision.

11/07/2017 03/08/2023 02/15/2019 08/20/2025 Paul Nguyen Manager, Central Certification Branch Compliance and Airworthiness Division Aircraft Certification Service 3 Installation of an engine modified per STC SE0417CH on aircraft listed on FAA Approved Model List (AML) No. SA04211CH dated August 20, 2025, or later FAA approved revision, in accordance with Western Skyways Aircraft Modifications installation instructions listed on AML SA04211CH.

SA04211CH 08/20/2025 3

SA04211CH 08/20/2025 (Limitations and Conditions continued)

2. FAA Approved Airplane Flight Manual Supplement document number WS103608, Revision B, Approved March 22, 2018, or later FAA approved revision.

3. A copy of this Certificate and FAA Approved Model List (AML) No. SA04211CH dated August 20, 2025, or later FAA approved revision, must be maintained as part of the permanent records for the modified airframe.

4. The installer must determine whether this design change is compatible with previously approved modifications.

5. If the holder agrees to permit another person to use this certificate to alter a product, the holder must give the other person written evidence of that permission.

### SA04211CH_AML.pdf

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 1 of 6

**ITEM**

**MAKE**

Model/Series Certification Basis/Amendment TCDS No. Installation Drawing FLIGHT MANUAL SUPPLEMENT INSTRUCTIONS FOR CONTINUED AIRWORTHINESS MFG P/N Model Specific notes Initial Approval Date AML AMENDMENT DATE

1. Textron Aviation Inc.

TP206A, TP206B, TP206C, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 A4CE WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-01 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

2. Textron Aviation Inc. T207, T207A Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6

A16CE WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-01 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

3. Textron Aviation Inc.

T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-01 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 2 of 6

**ITEM**

**MAKE**

Model/Series Certification Basis/Amendment TCDS No. Installation Drawing FLIGHT MANUAL SUPPLEMENT INSTRUCTIONS FOR CONTINUED AIRWORTHINESS MFG P/N Model Specific notes Initial Approval Date AML AMENDMENT DATE

4. Textron Aviation Inc.

206, P206, P206A, P206B, P206C, P206D, P206E, U206, U206A, U206B, U206C, U206 D, U206E, U206F, U206G Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 A4CE WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-02 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

5. Textron Aviation Inc. 207, 207A Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6 A16CE WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-02 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

6. Textron Aviation Inc.

210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, 210N, 210R

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609 Rev Ini, 12/12/2016 WS103608 Rev B WS103607 Rev B WS103609-02 TN Aircraft with Intercooler WS202016 8/20/2025 8/20/2025

7. Textron Aviation Inc. TP206, TU206, Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 and CFR 23 Amdt. 23-1 through 23-6 A4CE WS103609- 03 Rev IR None WS103609-03 Rev IR WS103609-03 Fuel Vent Line Modification 8/20/2025 8/20/2025

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 3 of 6

**ITEM**

**MAKE**

Model/Series Certification Basis/Amendment TCDS No. Installation Drawing FLIGHT MANUAL SUPPLEMENT INSTRUCTIONS FOR CONTINUED AIRWORTHINESS MFG P/N Model Specific notes Initial Approval Date AML AMENDMENT DATE

8. Textron Aviation Inc. T207 Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6

A16CE WS103609- 03 Rev IR None WS103609-03 Rev IR WS103609-03 Fuel Vent Line Modification 8/20/2025 8/20/2025

9. Textron Aviation Inc.

T210F (SN T210-0001 to T210-0197), T210G (SN T210-0198 to T210-64535)

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609- 03 Rev IR None WS103609-03 Rev IR WS103609-03 Fuel Vent Line Modification 8/20/2025 8/20/2025

10. Textron Aviation Inc.

TP206A, TP206B, TP206C, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G

Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 and CFR 23 Amdt. 23-1 through 23-6 A4CE WS103609- 04 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-04 R15805 Intercooler 8/20/2025 8/20/2025

11. Textron Aviation Inc. T207, T207A Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6

A16CE WS103609- 04 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-04 R15805 Intercooler 8/20/2025 8/20/2025

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 4 of 6

**ITEM**

**MAKE**

Model/Series Certification Basis/Amendment TCDS No. Installation Drawing FLIGHT MANUAL SUPPLEMENT INSTRUCTIONS FOR CONTINUED AIRWORTHINESS MFG P/N Model Specific notes Initial Approval Date AML AMENDMENT DATE

12. Textron Aviation Inc.

T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609- 04 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-04 R15805 Intercooler 8/20/2025 8/20/2025

13. Textron Aviation Inc.

TP206A, TP206B, TP206C, TP206D, TP206E, TU206A, TU206B, TU206C, TU206D, TU206E, TU206F, TU206G

Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 and CFR 23 Amdt. 23-1 through 23-6 A4CE WS103609- 05 Rev IR None WS103609-05 Rev IR WS103609-05 Cessna T200 Fuel Pressure Regulator 8/20/2025 8/20/2025

14. Textron Aviation Inc. T207, T207A Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6

A16CE WS103609- 05 Rev IR None WS103609-05 Rev IR WS103609-05 Cessna T200 Fuel Pressure Regulator 8/20/2025 8/20/2025

15. Textron Aviation Inc.

T210F, T210G, T210H, T210J, T210K, T210L, T210M, T210N

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609- 05 Rev IR None WS103609-05 Rev IR WS103609-05 Cessna T200 Fuel Pressure Regulator 8/20/2025 8/20/2025

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 5 of 6

**ITEM**

**MAKE**

Model/Series Certification Basis/Amendment TCDS No. Installation Drawing FLIGHT MANUAL SUPPLEMENT INSTRUCTIONS FOR CONTINUED AIRWORTHINESS MFG P/N Model Specific notes Initial Approval Date AML AMENDMENT DATE

16. Textron Aviation Inc.

206, P206, P206A, P206B, P206C, P206D, P206E, U206, U206A, U206B, U206C, U206D, U206E, U206F, U206G

Part 3, CAR eff May 15, 1956, as amended by 3-1 through 3-8 and CFR 23 Amdt. 23-1 through 23-6 A4CE WS103609- 06 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-06 R15805 Intercooler 8/20/2025 8/20/2025

17. Textron Aviation Inc. 207, 207A Part 23 of the Federal Aviation Regulations effective February 1, 1965, as amended by 23-1 through 23-6

A16CE WS103609- 06 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-06 R15805 Intercooler 8/20/2025 8/20/2025

18. Textron Aviation Inc.

210D, 210E, 210F, 210G, 210H, 210J, 210K, 210L, 210M, 210N, 210R

Part 3 of the Civil Air Regulations effective May 15, 1956, with no amendments

3A21 WS103609- 06 Rev IR WS103608 Rev B WS103252 Rev IR WS103609-06 R15805 Intercooler 8/20/2025 8/20/2025

FAA APPROVED MODEL LIST (AML) NO. SA04211CH Western Skyways Aircraft Modifications Installation of engine modified by SE0417CH Issue Date: August 20, 2025 Page 6 of 6

FAA Approved: _____________________________ Paul Nguyen Manager, Central Certification Branch Compliance & Airworthiness Division Aircraft Certification Service Reissued:

Amended:

### SE0417CH.pdf

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

Luited States of America Department of Transportation -- Federal Abiation Administration Supplemental agpe Certificate Number SEDAITCH This certificate issued. le Western Skyways Aircraft Modifications, Inc.

• 140 Industrial Drive Burlington, WI 53105 certifies thut the chunge in the type design fer the fellewing preduct with the limitutions and cenditicas therefer us specifiet hereen meets the airerthiness requirements of furt 33 of the Federal Aviation

•Reguliens. (See Type Certificate Data Sheet No. ESCE, ESCE and E3SO for complete certification basis) Criginal Preduct Type Certificate Number : ESCE, ESCE and E3SO Make : Continental Motors Abodel: 10-520-A, -F. -J, and -L, TSIO-520-C. -G. -H. -M, and -R. and 10- 550-F and -L Lescription o/ Type Design Change:

The turbo-normalization of Continental Motors engine models 10-520-A. -F. -J. and -L, TSIO-520-C. -G. -H, -M, and -R., and 10- 550-F and -L.

Limitations und. Conditicas:

I. The installer must determine whether this design change is compatible with previously approved modifications.

2. This conversion is to be performed per Master Data List MDL for ENGINE ASSEMBLY TSIO-550-F. L (TN). TSIO-520- A. C.

F. G, H. J, L, M, R (TN), report number WS202001, revision B, dated February 1, 2017, or later FAA approved revision.

If the holder agrees to permit another person to use this certificate to alter the product, the holder must give the other person written evidence of that permission.

This certificate and the supperting datu which is the fuses fer uppreval shalt remain in offeet until surrendered, suspended, revcked or a termination dute is etherwise established ty the . baministrater of the Federal Grintica Administratico.

Lufe c/ application : September 25, 2016 Bute reissued :

Lute c/ issuunce : February 6, 2017 Dule umended: October 22,2019

•By dirretico of the Administrater * M. Talleran (Signature) TOMNISTRATIO Roy E. Boffo III Manager, Propulsion and Program Management Section Chicago ACO Branch (Title) Any alteration of this certificate is punishable by a fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both FAN FORM 8110-2(10-68) PAGE 1 of 2 PAGES This certificate may be transferred in accordance with FAR 21.4

Alnited States of America Department of Transportation -- Federal Abiation Administration Supplemental Type Certificate Number SA01211CH This certificate issued le Western Skyways Aircraft Modifications, Inc.

140 Industrial Drive Burlington, WI 53105 cerlifies that the chunge in the type design fer the fellewing preduct with the limitutions and cenditiens therefer us specified hereen meets the nirverthiness requirements of : Purt 23 of the Federal Aviation Reynwicus. (See Type Certificate Data Sheet No. A4CE, A16CE and 3A21 for complete certification basis) Criginul: Preduct - Type Cerlifieute Number: AACE, A16CE and 3A21

•Make : Textron Aviation Inc.

Model: 206, P206, A, B, C, D, E, U206, A, B, C, D. E. F. G, 207, A, 210D, E.

P, G, H, J, K, L, M, N. R, TP206A, B, C. D. E, TU206A. B. C. D, E, F.

Lescription of Type Design Change: G, T207, T207A, T210F. G, H, J, K, L, M, N The installation of a turbo normalize Continental engine IO 520 and 10-550 into the Textron Aviation Inc. 206, 207 & 210 aircraft listed in the Model list per Master Data List MDL for Cessna (206() (TN). (207) (TN) and ()210() (TN) Aircraft with TSIO-520- TN mod. (AFGHLM) or TSIO-550-TN mod. (FL) Installed, report number WS203001, revision D. dated June 17, 2017 or later FAA approved revision..

Limitations und Genditicas:

The installer must determine whether this design change is compatible with previously approved modifications.

If the holder agrees to permit another person to use this certificate to alter the product, the holder must give the other person written evidence of that permission.

FAA Approved Airplane Flight Manual Supplement, Cessna 206, 207 & 210 TN Airplane Flight Manual Supplement and Pilot's Operating Handbook Supplement, Revision A, approved July 20, 2017 or later FAA approved revision is required with this modification.

This certificate and the supperling datu which is the busis for uppreeat shull remain in feet until surrendered, suspended, revcked or a terminatien date is etherwise estublished by the . Administrater of the Tederal Aviatico Administratica.

Lute c/ applientien : September 25,2016 Dule reissued:

Lule o/ issunce : July 20, 2017 Dule unended: October 22,2019 FEDERAL AVIATION ircetion of the Administrater

- Salisuan (Signature) TOMINISTRATIO of Manager, Propulsion and Program Management Section Roy E. Boffo III Chicago ACO Branch (Title) alteration of this certificate is punishable by a fine of not exceeding $1,000, or imprisonment not exceeding 3 years, or both.

FAA FORM 8110-2 (10-68) PAGE 1 of 2 PAGES This certificate may be transferred in accordance with FAR 21.47.

## Every issue (2)

- August 20, 2025: Amended, Current. [certificate](https://openairdocs.org/files/sha256/99/e1/99e1cdd3216e5c2fb9c7b62264b8a0b9828f0ab7b79689f240ced37c86c2823c), [SA04211CH_AML.pdf](https://openairdocs.org/files/sha256/98/73/9873830c01a2e51fc6f08f2e4b89ab339a1f59462fa2ede386b35996c123b91c), [SE0417CH.pdf](https://openairdocs.org/files/sha256/25/06/2506bd13fb197584f4fc057495551758fc2de261b4efb2ded4b7609e0f1e8872)
- July 20, 2017: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/dc/18/dc18c0197ac0101539979e01dd0f379793b9e288c478d62ded7016db5364f327)

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