# STC ST2296NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Transnorthern Aviation, United States
- Description: Installation of a propeller auto feather system utilizing total pressure probes in the propeller prop wash as the sensing medium.
- Applied: February 28, 1984
- Status date: July 27, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A2](https://openairdocs.org/tcds/6A2)
- Certificate PDF: https://openairdocs.org/files/sha256/5c/ad/5cad3313435aec5ca563a445d55ecb94a307939065414fad760b1ddbf95e2d4d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/038008EF08E26E268625760900409D85.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST2296NM

## ADs that name it (0)

None.

## Approved models (2)

- McDonnell Douglas Corporation R4D-8 ([TCDS 6A2](https://openairdocs.org/tcds/6A2))
- McDonnell Douglas Corporation R4D-8Z ([TCDS 6A2](https://openairdocs.org/tcds/6A2))

## 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: ST2296NM This certificate issued to: TRANSNORTHERN AVIATION 4510 OLD INTERNATIONAL AIRPORT ROAD ANCHORAGE, ALASKA 99502 Part' 4b of the. Civil Sir Pegulations.

Original Product Type Certificate Number: 6A2 Make:

McDonnell Douglas Model.

R4D-8, R4D-8Z Description of Type Design Change: Installation of a propeller auto feather system utilizing total pressure probes in the propeller prop wash as the sending medium per Airpower Drawing List No.

R4D-8411, Revision B dated August 15, 1984, or later FAA approved revision. Flight Manual Supplement No. 1 dated November 20, 1984, or later FAA approved revisions is required as part of this installation. Aircraft model R4D-8, S/N 43327, per R4D-8411 Revision A dated June 21, 1984.

Limitations and Conditions: The approval of this change in type design applies basically to the Douglas Models R4D-8 and R4D-8Z. This approval should not be extended to other specific aircraft of these models on which other previously modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect on the airworthiness of the 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.

The FAA will reissue the certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of the Supplemental Type Certificate Number to (Name of transferee) (Address of transfer) (Number and street) (City, State, and Zip code) from (Name of grantor) (Print or type)_ (Address of grantor) (Number and street) (City, State, and Zip code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- July 27, 2009: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5c/ad/5cad3313435aec5ca563a445d55ecb94a307939065414fad760b1ddbf95e2d4d)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.