# STC SA4797SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Installation of Dual Delco Carousel inertial navigation 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/fc/e4/fce4d2465e1fb7cdb87afbfd3e7cf1dc708208f0169dc22aca92ecc2e6f1b1a3
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/59FE0ACBC7C85AB985256CC2000E3EAE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4797SW

## 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.

JHnttcb plates at '(EraitspDrlaltcm - J (A&taltcm JV&mmtsiralum Certificate SA4797SW Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 Boeing 727-100 4b Civil Air Installation of Dual Delco Carousel Inertial Navigation Systems in accordance with Drawing List B727-DL-008, Rev. G dated 11/18/82, or later FAA approved revision.

FAA Approved Airplane Flight Manual Supplement dated November 18, 1982, is required.

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

.-April 15, 1982 November 18, 1982 .- December 01, 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 ZJP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ^IP 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/fc/e4/fce4d2465e1fb7cdb87afbfd3e7cf1dc708208f0169dc22aca92ecc2e6f1b1a3)

---
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.