# STC SA03051NY

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: RUAG Aerospace Services GmbH, Germany
- Description: Installation of Honeywell Aerospace ACAS-II System with Dual MST-67A Mode S Transponder
- Applied: April 7, 2011
- Status date: January 17, 2012
- Product: Aircraft, Small Airplane
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A1WI](https://openairdocs.org/tcds/A1WI)
- Certificate PDF: https://openairdocs.org/files/sha256/c4/53/c453abeed7a479e3fc3b86a38849386a3b7a90c350731f6af56a7b87461190be
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/E66D737E0F5B85A486257A4C0071B0A1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA03051NY

## ADs that name it (0)

None.

## Approved models (2)

- Cessna Aircraft Company 525 ([TCDS A1WI](https://openairdocs.org/tcds/A1WI))
- Cessna Aircraft Company 525A ([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.

This certificate issued to

Part 23 of the Federal Aviation Regulations.

1. Installation of Honeywell Aerospace ACAS-II System with Dual MST-67A Mode S Transponder in accordance with RUAG Master Document List, document number 128A-MDL, revision B, dated December 8, 2011.

2. The following RUAG Aerospace documents are required with this installation:

a. The aircraft must be maintained in accordance with Continued Airworthiness Plan, document number 128A-CAWP, revision A, dated December 8, 2011.

b. EASA approved Airplane Flight Manual Supplement, document number 128A-AFMS, revision A dated December 8, 2011, is required with this installation.

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 must give the other person written evidence of that permission.

RUAG Aerospace Services GmbH Postfach 1253 Sonderflugplatz Oberpfaffenhofen 82231 Wessling Germany A1WI Make : Cessna Aircraft Company Model: 525, s/n 0360 and up; 525A

Date of application : April 7, 2011

Date of issuance : January 17, 2012 Date reissued :

(Signature) Timothy Hadsall Acting Manager New York Aircraft Certification Office

(Title)

Number SA03051NY Issued: January 17, 2012

Certification Basis

Based on 14 CFR § 21.115 and § 21.101, and the FAA policy for significant changes in FAA Order 8110.48, the certification basis for the Cessna Aircraft Company model 525, s/n 0360 and up and model 525A is as follows:

a. The type certification basis for the Cessna Aircraft Company model 525, s/n 0360 and up and model 525A 700 is shown on TCDS A1WI for parts not changed or not affected by the change.

b. The type certification basis for the Cessna Aircraft Company model 525, s/n 0360 and up and model 525A is shown on TCDS A1WI for parts changed or affected by the change.

…………END…………

## Every issue (1)

- January 17, 2012: Issued, Current. [certificate](https://openairdocs.org/files/sha256/c4/53/c453abeed7a479e3fc3b86a38849386a3b7a90c350731f6af56a7b87461190be)

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