# STC SA04505CH

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Hartzell Propeller Inc., United States
- Description: Installation of Hartzell Propeller model HC-C3YF-1N/NM8410-4 or HC-C3YF-1N/NM8410K-4
- Applied: March 1, 2021
- Status date: July 14, 2026
- Product: Aircraft, Small Airplane
- Data sheets: [TCDS 3A15](https://openairdocs.org/tcds/3A15)
- Certificate PDF: https://openairdocs.org/files/sha256/f4/ca/f4ca0ad6b952495c37cc66d9bdd4556fe4bc1c2d4da577fa41fc5bfec8d698d3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID121776183420260821133527.0001
- DRS record last changed: August 21, 2026
- Page: https://openairdocs.org/stc/SA04505CH

## ADs that name it (0)

None.

## Approved models (13)

- Textron Aviation Inc. 35-C33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. 36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. A36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. A36TC ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. E33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. E33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. F33A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. F33C ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. G36 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. S35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. V35 ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. V35A ([TCDS 3A15](https://openairdocs.org/tcds/3A15))
- Textron Aviation Inc. V35B ([TCDS 3A15](https://openairdocs.org/tcds/3A15))

## 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 Aviation Administration Supplemental Type Certificate Number 

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Original Product 7\SH&HUWLILFDWH1XPEHU Make:

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**HARTZELL PROPELLER LLC**

ONE PROPELLER PLACE PIQUA, OHIO 45356-2634 CAR3 the Federal Aviation Regulations 3A15 Textron Aviation Inc.

S35, V35, V35A, V35B, 35-C33A, E33A, E33C, F33A, F33C, 36 (S/N E-1 through E-184), A36 (S/N E-185 through E-2110 except E-1946 and E-2104), A36 (S/N E-1946, E-2104, E-2111 through E-3635 except E-3630), G36, A36TC Installation of Hartzell Propeller model HC-C3YF-1N/NM8410-(4,6) or HC-C3YF-1N/NM8410(B,K)-(4,6) in accordance with Hartzell STC Installation Instructions INST-061920 Revision A dated July 07, 2026 or later FAA-approved revisions. Airplane Flight Manual Supplement AFMS-061920 Revision B dated July 07, 2026 or later FAA-approved revision is required. Instructions for Continued Airworthiness ICA-061920 Revision A dated July 07, 2026 or later FAA-accepted revision are applicable.

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

2. 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.

3. This design change has been shown to be compatible with STC SA01136WI or STC SA2239CE.

(See Continuation Sheet, Page 3 of 4) 3/1/21 3/19/21 7/14/26 Bo R. Landess STC ODA administrator Hartzell Propeller ODA-100082-CE 4

(Continuation Sheet) Number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imitations and Conditions (Continued):

4. This STC is applicable only to the Models listed with the following engines:

(a) Continental Aerospace Technologies, Inc. IO-550-B

(b) Continental Motors IO-520-B or IO-520-BB

(c) Continental Aerospace Technologies, Inc. TSIO-520-U(B)

5. Revised Type Certificate Data Sheet information:

Propeller and Propeller Accessories:

(a.) Hartzell constant speed 3-bladed propeller installation Hartzell HC-C3YF-1N hub with NM8410-4 or NM8410K-4 blades Diameter: Not over 82.0 inches, not under 82.0 inches Pitch settings at 30 in. sta.:

Low Pitch: 11.3° +/- 0.2° (for installations with IO-550-B) Low Pitch: 11.0° +/- 0.2° (for installations with IO-520-B or IO-520-BB) High Pitch: 31.0° +/- 1.0° Hartzell A-2295-15(P) spinner assembly (NM8410-4 or NM8410K-4 blades) Note: Spinner may be painted or polished.

(b.) Hartzell constant speed 3-bladed propeller installation Hartzell HC-C3YF-1N hub with NM8410-6 or NM8410(B,K)-6 blades Diameter: Not over 80.0 inches, not under 80.0 inches Pitch settings at 30 in. sta.:

Low Pitch: 10.4° +/- 0.2° (for installations with IO-550-B or TSIO-520-U(B)) High Pitch: 31.1° +/- 1.0° Hartzell A-2295-(15,16,17)(P) spinner assembly Note: Spinner may be painted or polished.

(c.) Hartzell S-1-35 governor

6. Propeller model HC-C3YF-1N/NM8410K-(4,6) is limited to aircraft with a 28-VDC electrical system where this propeller is replacing an existing 3-blade installation with electrothermal de-ice boots.

7. A copy of this certificate must be maintained as part of the permanent records for the modified airplane.

(See Continuation Sheet, Page 4 of 4) 34 07/14/26

(Continuation Sheet) Number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ertification Basis:

Applicable to models S35, V35, V35A, V35B, 35-C33A, E33A, E33C, F33A, F33C, 36 (S/N E-1 through E-184), A36 (S/N E-185 through E-2110 except E-1946 and E-2104):

The original certification basis (CAR 3 as amended May 15, 1956) was used with the following exceptions:

14 CFR 23.907 Amendment 23-59 14 CFR 23.1529 Amendment 23-26

Applicable to models A36 (S/N E-1946, E-2104, E-2111 through E-3635 except E-3630), G36, A36TC:

14 CFR Part 23 Initial Amendment was used with the following exceptions:

14 CFR 23.201 Amendment 23-62 14 CFR 23.907 Amendment 23-59 14 CFR 23.929 Amendment 23-14 (applicable only to models A36 and G36 when CAV Systems STC SA01136WI was previously installed) 14 CFR 23.1043 Amendment 23-7 14 CFR 23.1047 Amendment 23-21 14 CFR 23.1419 Amendment 23-14 (applicable only to models A36 and G36 when CAV Systems STC SA01136WI was previously installed) 14 CFR 23.1529 Amendment 23-26 14 CFR 23.1583 Amendment 23-7

This modification does not constitute an acoustical change per 14 CFR 21.93(a)(b3) Amendment 21-97.

---------------------------------------------------- END -------------------------------------------------------- 44 07/14/26

## Every issue (2)

- July 14, 2026: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f4/ca/f4ca0ad6b952495c37cc66d9bdd4556fe4bc1c2d4da577fa41fc5bfec8d698d3)
- March 19, 2021: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/5e/9e/5e9e315974a5980018f60d4525c64b89ce3d1ecb758992ffea6c3a8a1d5e7a97)

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