# STC SA4026NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aero Air, LLC, United States
- Description: Installation of two Hartzell HC-B3TN-5 (E)/T10178B-13Q propellers on Cessna 441 airplanes equipped with Garrett engine Models TPE-331-B-401S, 402S, 403S or 404S.
- Applied: September 18, 1987
- Status date: October 6, 1987
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A28CE](https://openairdocs.org/tcds/A28CE)
- Certificate PDF: https://openairdocs.org/files/sha256/07/82/0782a8d45f10d40ae223e27ec434f2644c6200b08961713e7b9f9a9c065f2274
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7C933A362335471185256CC2000C6041.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4026NM

## ADs that name it (0)

None.

## Approved models (1)

- The Cessna Aircraft Company 441 ([TCDS A28CE](https://openairdocs.org/tcds/A28CE))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1026NM This certificate issued to: AErO AII, INC.

Certifies that the change in the type design for the following product with the limitations and conditions thereferasspecified hercommeets thesimenthinessurequirements / Purt 23 fithe Federa1 Aviation Regulations:

Original Product - Type Certificate Number: A28CE Make: Cessna Model: 441 Installation of two Hartzell HC-B3TN-5(E)/T10178B-13Q propellers on Cessna Model 44 airplanes equipped with Garrett Engine Models TPE-331-B-401S, 402S, 403S or 4045 in accordance with a FAA sealed copy of Aero Air, Inc. Installation Instruction Number 441, sheets 1 through 8, dated October 6, 1987, or later FAA approved revision.

Limitations and Conditions: Approval of this change in type design applies to basic Cessna Model 441 airplanes only. 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 modifications will introduce no adverse effect on the airworthiness of that aircraft. Airplanes equipped with this modification must be operated in accordance with FAA Approved Airplane Flight Manual Supplement dated October 6, 1987, or later FAA approved revision, a copy of which must be carried in the modified airplane at all times.

й. Кидет (Sercture) TOMINIST RATO Assistant Manager, Seattle Aircraft Certification Office (Title)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA1026NM Limitations and Conditions: (continued)

NOISE LEVEL The corrected noise level of the Cessna Model 441 airplanes with these propellers is less than that of the original airplane.

No determination has been made by the Federal Aviation Administration that the noise levels of this airplane are or should be acceptable or unacceptable for operation at, into, or out of, any airport.

- END -

**FAA FORM 8110-2-1 (10-69) PAGE 30F 3 PAGES**

## Every issue (1)

- October 6, 1987: Issued, Current. [certificate](https://openairdocs.org/files/sha256/07/82/0782a8d45f10d40ae223e27ec434f2644c6200b08961713e7b9f9a9c065f2274)

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