# STC SR00021AT

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Sky Sign Inc, United States
- Description: Installation of Skysign electronic billboard.
- Applied: July 23, 1992
- Status date: August 29, 2002
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS 4H12](https://openairdocs.org/tcds/4H12)
- Certificate PDF: https://openairdocs.org/files/sha256/25/70/2570c82dd9ba733515963fb699840a0b023fb90aaafc883330a19d9439796730
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CE2383CB4BBABE1585256CC200622435.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SR00021AT

## ADs that name it (0)

None.

## Approved models (1)

- Schweizer RSG LLC 269C ([TCDS 4H12](https://openairdocs.org/tcds/4H12))

## 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 (11/20) SUPERSEDES PREVIOUS EDITION Page 1 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

SR00021AT Sky Sign, LLC 4101 SW Leighton Farm Ave.

Palm City, FL 34990 Part 6 the Civil Air Regulations 4H12 Schweizer 269C Installation of Skysign electronic billboard in accordance with R. T. Aerospace Drawings H47C, Revision "A", dated October 14, 1992, and RT-S305320.6242, Revision "A", dated October 5, 1992, or later FAA approved revisions.

(Limitations and Conditions on page 3 of 3) July 23, 1992 April 26, 2021 November 6, 1992 August 29, 2002 (for) Christina M. Underwood, Manager, Atlanta ACO Branch 3

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page 2 of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number:

SR00021AT 3

FAA Form 8110-2 (11/20) SUPERSEDES PREVIOUS EDITION Page ___ of ___ United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number:

SR00021AT Limitations and Conditions:

This approval should not be extended to other rotorcraft of this model on which other previously approved 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 produce no adverse effect upon the airworthiness of that rotorcraft. FAA Approved Rotorcraft Flight Manual Supplement, dated November 6, 1992, is a required part of this STC. 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.

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## Every issue (1)

- August 29, 2002: Amended, Current. [certificate](https://openairdocs.org/files/sha256/25/70/2570c82dd9ba733515963fb699840a0b023fb90aaafc883330a19d9439796730)

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