# STC SA04520NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: CESSNA Duesseldorf Citation Service, Germany
- Description: ADS-B Out GNSS source modification for transponder #2
- Applied: September 4, 2019
- Status date: July 20, 2020
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A1WI](https://openairdocs.org/tcds/A1WI)
- Certificate PDF: https://openairdocs.org/files/sha256/c5/6c/c56c1500638676fc9fc42b2c0dc29ca0432c4217a364fc2c531eabda2bfed1d8
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/30B448FAE328971B862585D90060A198.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA04520NY

## ADs that name it (0)

None.

## Approved models (4)

- Textron Aviation Inc. 525 ([TCDS A1WI](https://openairdocs.org/tcds/A1WI))
- Textron Aviation Inc. 525A ([TCDS A1WI](https://openairdocs.org/tcds/A1WI))
- Textron Aviation Inc. 525B ([TCDS A1WI](https://openairdocs.org/tcds/A1WI))
- Textron Aviation Inc. 525C ([TCDS A1WI](https://openairdocs.org/tcds/A1WI))

## 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 (4/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___

Part of .

IMPORT SA04520NY Cessna Duesseldorf Citation Service Center GmbH Flughafenstrasse 50 Duesseldorf, Germany 40474 23 Federal Aviation Regulations A1WI Textron Aviation Inc.

525 Series (Citation), 525, 525A, 525B, 525C

1. ADS-B Out GNSS source modification for transponder #2 in accordance with Cessna Duesseldorf Master Document List Doc No. 2019-1-16, Revision IR, dated January 14, 2019, or later EASA approved revisions.

2. Aircraft operation in accordance with Cessna Duesseldorf Approved Flight Manual Supplement Doc No.

2019-1-8, Revision IR, dated January 14, 2019, or later EASA approved revisions.

3. Maintenance in accordance with Cessna Duesseldorf Instructions For Continued Airworthiness Doc No.

2019-1-10, Revision A, dated March 26, 2020, or later EASA accepted revisions.

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 the certificate to alter the product, the holder shall give the other person written evidence of that permission.

09/04/2019 07/20/2020 Timothy J. Hadsall Acting Manager New York ACO Branch 1

## Every issue (1)

- July 20, 2020: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c5/6c/c56c1500638676fc9fc42b2c0dc29ca0432c4217a364fc2c531eabda2bfed1d8)

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