# STC ST10279SC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Aircraft Systems & Mfg, United States
- Description: Installation of Avtech Display Switching Unit with a Honeywell EGPWS in accordance with Aircraft Systems and Manufacturing Top Drawing List 5644-0001-00, Revision B, dated September 1, 2004, or later FAA approved revision.  FAA approved Airplane Flight Manual Supplement Document No. 5644-2160-00, Revision I.R., dated September 2, 2004, is required.
- Applied: March 8, 2004
- Status date: September 3, 2004
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/92/22/92228abd928232a2099b3903b994fea6be2c3e524a85f31e150c5ceac75ccbe3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/15C78BA2CC130F8486256FA40059DC23.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST10279SC

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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.

United States Of America Department of Transportation - Federal Aviation Administration Supplemental Type Certificate Project Number ST7782SC-T, GDM Number ST10279SC This Certificate issued to Aircraft Systems & Manufacturing 302 Toledo Trail Georgetown, TX 78628

Part 4b of the Civil Air Regulations.

Original Product Type Certificate Number : A3WE Make : Boeing Model : 727-100 Series; 727-200 Series

Description of Type Design Change: Installation of Avtech Display Switching Unit with a Honeywell EGPWS in accordance with Aircraft Systems and Manufacturing Top Drawing List 5644-0001-00, Revision B, dated September 1, 2004, or later FAA approved revision. FAA approved Airplane Flight Manual Supplement Document No. 5644-2160- 00, Revision I.R., dated September 2, 2004, is required.

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

Date of application : March 8, 2004

Date of issuance : September 3, 2004 Date reissued :

( Signature) S. Frances Cox Manager, Special Certification Office Southwest Region

(Title)

## Every issue (1)

- September 3, 2004: Issued, Current. [certificate](https://openairdocs.org/files/sha256/92/22/92228abd928232a2099b3903b994fea6be2c3e524a85f31e150c5ceac75ccbe3)

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