# STC SA174RM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries Inc, United States
- Description: Installation of extended width cabin door.
- Applied: April 30, 1979
- Status date: July 21, 2005
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A22CE](https://openairdocs.org/tcds/A22CE)
- Certificate PDF: https://openairdocs.org/files/sha256/8b/0f/8b0f3fc2939193354753305a411059fde675e9f250be36d508a914d0b05af9a9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0F214A778277FCDA86257054006227FA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA174RM

## ADs that name it (0)

None.

## Approved models (3)

- Textron Aviation Inc. 500 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- Textron Aviation Inc. 550 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))
- Textron Aviation Inc. 560 ([TCDS A22CE](https://openairdocs.org/tcds/A22CE))

## 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.

FAA Form 8110-2 (5/14) Page 1 of 2

Reissued on July 31, 2017 to supersede the original STC, which has been lost or misplaced.

Number: SA174RM

Part 25 of the Federal Aviation Regulations.

Original Product – Type Certificate Number: A22CE Make: Cessna Model: 500, 550, 560

Installation of Extended Width Cabin Door in accordance with Branson Aircraft Corporation list of drawings and documents, Extended Door, Number 91500, dated April 26, 1979, FAA approved April 30, 1979, or later FAA approved revision.

1. 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 relationship between this change and any other previously approved modification will introduce no adverse effect upon the airworthines s of that aircraft.

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.

Date of Application: April 30, 1979 Date Reissued: 11/15/82; 9/14/83; 12/24/97; 7/21/05; 7/31/17 Date of Issuance: May 04, 1979 Date Amended: December 12, 1991

Signature

Title Jim Grigg Manager, Fort Worth A CO Branch, Compliance & Airworthiness Division Sierra Industries, Ltd.

122 Howard Langford Drive Uvalde, TX 78801

FAA Form 8110-2 (5/14) Page 2 of 2

Transfer the ownership of Supplemental Type Certificate Number: SA174RM

To (Name and address of transferee)

From (Name and address of grantor)

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA18NW

FAA Form 8110-2 (5/14) Page 3 of 3

## Every issue (1)

- July 21, 2005: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/8b/0f/8b0f3fc2939193354753305a411059fde675e9f250be36d508a914d0b05af9a9)

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