# STC SA4800SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Installation of Dual Collins FDS-85 flight director system.
- Applied: April 15, 1982
- Status date: December 1, 1999
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/09/58/095870696c8cb9b52f7a332f84c58234679afaee411e4cbb132445b1eeb874fa
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/978262A7B01C34D485256CC2000E3EC0.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4800SW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 727-100 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.

JHittteb ^tatee 0f "(Eranapflriaiiutt - Jlfcheral (Afriatum jAittmntairatum SA4800SW Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 4b Civil Air Boeing 727-100 Installation of Dual Collins FDS-85 Flight Director System in accordance with Drawing List B727-DL-004, Revision F dated 11/12/82, or later FAA approved revision.

1. FAA Approved Airplane Flight Manual Supplement dated November 29, 1982, is required.

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

.- April 15, 1982 November 29, 1982 '.- December 1, 1999 (Signature) Michele M. Owsley, Manager Airplane Certification Office, Southwest Region (Title)—————————————

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number .

to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ^IP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, Slate, and <7P code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- December 1, 1999: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/09/58/095870696c8cb9b52f7a332f84c58234679afaee411e4cbb132445b1eeb874fa)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.