# STC SA4150SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sierra Industries, Inc, United States
- Description: Installation of Dual Carousel IV A Inertial Navigation System.
- Applied: June 11, 1979
- Status date: December 1, 1999
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A21](https://openairdocs.org/tcds/4A21)
- Certificate PDF: https://openairdocs.org/files/sha256/f0/7d/f07d449c40a5d563e91742cbe13d07f0584eb534fed05b9d4600edb6510f7d59
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/691B1142B61EF5E285256CC2000E39E5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4150SW

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707-100 Long Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))

## 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.

JHnttth ^tatee <©f .Amer ieparimeni upplemental Certificate SA4150SW Sierra Industries, Inc., a Texas Corporation Garner Field Road Uvalde, TX 78801 4b Civil Air 4A21 *s0&a&> .• Boeing 707-100 Series Installation of Dual Carousel IV A Inertial Navigation System according to Drawing List 40-1 dated 5/23/80, or later FAA approved revision.

FAA Approved Airplane Flight Manual Supplement dated July 2, 1980, is required.

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

.- June 11, 1979 July 02, 1980 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 <7/> code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and <7/> 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/f0/7d/f07d449c40a5d563e91742cbe13d07f0584eb534fed05b9d4600edb6510f7d59)

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