# STC SA2803SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Installation of seat support subfloor beams and tracks.
- Applied: May 31, 1978
- Status date: December 1, 1999
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A28](https://openairdocs.org/tcds/4A28)
- Certificate PDF: https://openairdocs.org/files/sha256/48/dc/48dc6ed89be39ec78f74a3165ed73fce67b1b35b3cb8566eff41ac4d9fae9e2a
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/AF18C670D304EF7F85256CC20008C968.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2803SW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 720 Series ([TCDS 4A28](https://openairdocs.org/tcds/4A28))

## 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.

J&nitti, £tatt* ffif .

epartment of transportation - JifebEral Rotation (Al»mmsiralum upplewumtal Certificate SA2803SW Sierra Industries, Inc. , a Texas Corporation Garner Field Road Uvalde, TX 78801 4A28 Boeing 720 Series 4 b <y 4to C i VI1 Al r Installation of seat support subfloor beams and tracks in accordance with Drawing T-020-101, Revision A dated 5/30/78, or later FAA approved revision.

Compatibility of this modification with other previously approved modifications must be determined by the installer.

.- May 31, 1978 June 21, 1978 ' ty &<& .- December 01, 1999 (Signature) Michele M. Owsley, Manager Airplane Certification Office, Southwest Region (TVfte) Any alteration of [Jllj certificate In punijMOIe Cy I fine of not excrtclinq 51,000, or iBprJJOniient not excsedlng 3 yeara, or both.

FAA Form 6110-2 UO-68) Page 1 of 2 TftlJ certjficjts flay be transferred In accordance ultfi FAR 21.47.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number_ to (Name of transferee) (Address of transferee) and street) (City, State, and ZIP code) from (Name of grantor)(Print or type) (Address of grantor) (Number £ street) (City, State, and ZIP coda) Extent of Authority (if licensing agreement):

Signature of grantor (In ink)

## Every issue (1)

- December 1, 1999: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/48/dc/48dc6ed89be39ec78f74a3165ed73fce67b1b35b3cb8566eff41ac4d9fae9e2a)

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