# STC SA1184NW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Pacific Propeller International LLC, United States
- Description: Installation of Hartzell HC-B3TN-5/T10178E-13Q 
propellers on AiResearch Model TPE-331-43 series engines.
- Applied: December 8, 1980
- Status date: June 30, 2005
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/af/ba/afba064a28fd0161af51afad970b35558203d66c493cc27bab1ae7b9eee0bf94
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/78A3179C6794FFBF8625703C0065D6ED.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1184NW

## ADs that name it (0)

None.

## Approved models (3)

- Twin Commander Aircraft Corporation 680-V ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-W ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 681 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## 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 SA1184NW This certificate, issued to: Pacific Propeller International LLC 5802 South 228th Street Kent, WA 98032-1810 and Aero Air, Inc.

2050 NE. 25th Avenue Hillsboro, OR 97124

Part 3 of the Civil Air Regulations, dated May 15, 1956, and amendments 3-2, 3-3, 3-4, and 3-6.

Original Product ⎯Type Certificate Number: 2A4 Make: Rockwell Commander Model: 680V, 680W, and 681

Description of the Type Design Change: Installation of Hartzell HC-B3TN-5/T10178E-13Q propellers on AiResearch Model TPE-331-43 series engines in accordance with Pacific Propeller, Inc. Master Drawing List 76026.

Limitations and Conditions: Approval of this change in type design applies basically to the above model aircraft 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, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate, Addendum No.

SA1184NW, and FAA Approved Airplane Flight Manual Supplement, shall 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. (See Continuation Sheet, Page 2.)

Date of application: December 8, 1980 Date reissued: March 25, 2004 Date of issuance: February 17, 1981 Date amended: March 25, 2004; June 30, 2005

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

Pacific Propeller International LLC 5802 South 228th Street Kent, WA 98032-1810 and Aero Air, Inc.

2050 NE. 25th Avenue Hillsboro, OR 97124

Number SA1184NW

**SUPPLEMENTAL TYPE CERTIFICATE ADDENDUM NO. SA1184NW**

Reissued: March 25, 2004 Amended: June 30, 2005

Limitations and Conditions(Cont’d): The Conditions and Limitations of Type Certificate Data Sheet No. 2A4 apply except where superseded by the following:

This Supplemental Type Certificate Data Sheet, which is part of STC SA1184NW, prescribes the conditions and limitations under which the product for which the STC was issued meets the airworthiness requirements of the Civil Air Regulations.

ROCKWELL COMMANDER MODELS 680V, 680W, AND 681(NORMAL CATEGORY) AS MODIFIED BY STC SA1184NW

Engines: AiResearch TPE-331-43, -43A, and –43BL Engine Limits: Takeoff: 575 Hp Maximum Continuous: 500 Hp Propellers and Propeller Limits: Hartzell HC-B3TN-5/T10178E-13Q Takeoff: 800 Hp @ 2200 rpm, or;

1000 Hp @ 2000 rpm

Blade Angles: Reverse 8.7º @ 30” radius Flight 8.0º @ 30” radius Feather 86.5º @ 30” radiu

- END -

## Every issue (2)

- June 30, 2005: Amended, Current. [certificate](https://openairdocs.org/files/sha256/af/ba/afba064a28fd0161af51afad970b35558203d66c493cc27bab1ae7b9eee0bf94)
- March 25, 2004: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/60/9b/609b1816bc3317b71bb8c7f4a674f37596648dc10f113cedf06e065adf43e2d7)

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