# STC SA7550SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Textron Aviation Inc, United States
- Description: Installation of dual Collins radio tuning units.
- Applied: December 8, 1988
- Status date: February 21, 2017
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- Certificate PDF: https://openairdocs.org/files/sha256/5c/27/5c27c25a8d0a649afa78c5de4b2115242385da420c9a7f30c0206c6a70db6052
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9B467D42C5625CF786258163004E85E5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA7550SW

## ADs that name it (0)

None.

## Approved models (1)

- Raytheon Aircraft Company BAe.125 Series 800A (C-29A; U-125) ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

## 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

Part of the

Signature

Title SA7550SW Textron Aviation Inc.

One Cessna Boulevard Wichita, KS 67215 4b Civil Air Regulations.

Corporate Jets, Ltd.

BAe 125-800A 2 A3EU Installation of Dual Collins RTU-870/870A Radio Turning Units with TCAS control functions in accordance with Arkansas Aerospace, Inc., Drawing List No. 800-071, revision G, dated 1/24/94, or later FAA approved revision.

One of the following FAA approved Flight Manual Supplements, or later FAA approved revision, is required:

Supplement dated 2/25/89 for the RTU-870; Supplement dated 7/16/90 or 12/11/91 for the RTU-870A. Compatibility of this modification with previously installed equipment must be determined by installer.

February 21, 2017 December 8, 1988 February 25, 1989 July 16, 1990; December 11, 1991;

January 29, 1994 Mark Fuller STC ODA administrator ODA-100129-CE

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

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (2)

- February 21, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/5c/27/5c27c25a8d0a649afa78c5de4b2115242385da420c9a7f30c0206c6a70db6052)
- January 29, 1994: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/66/45/66451b3501f916c688687cfc401d3d8211b2db97a5b8dfa9a374499ced6d1104)

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