# STC ST08991SC

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Textron Aviation Inc, United States
- Description: Installation of a water basin overflow prevention timer-switch.
- Applied: August 15, 1994
- Status date: April 19, 2017
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- Certificate PDF: https://openairdocs.org/files/sha256/35/ff/35ff4cb7e6da63a8864bb5ea64408a6e7798be96b5755f53b3ba01d2ed9c4df1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5E648B1DB9B499278625817C004C5F83.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST08991SC

## ADs that name it (0)

None.

## Approved models (3)

- Beechcraft Corporation BAe.125 Series 800A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Beechcraft Corporation BAe.125 Series 800A (C-29A) ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Beechcraft Corporation BAe.125 Series 800A (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 ST08991SC Textron Aviation Inc.

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

British Aerospace BAe 125-800A 2 A3EU Installation of a water basin timer switch in accordance with Arkansas Aerospace, Inc. Drawing List 800-144 Rev. B, dated 12/5/94, or later FAA approved revision.

Compatibility of this design change with previously approved modifications must be determined by the installer.

April 19, 2017 January 10, 1995 August 15, 1994 November 22, 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)

- April 19, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/35/ff/35ff4cb7e6da63a8864bb5ea64408a6e7798be96b5755f53b3ba01d2ed9c4df1)
- January 10, 1995: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/e7/d4/e7d48f36cd4361329dd74d33900061c5e97eba3440dcfaa3f73a87a7128805d3)

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