# STC SA3958SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Installation of single Mode S transponder system.
- Applied: July 5, 1989
- Status date: January 20, 1991
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A22WE](https://openairdocs.org/tcds/A22WE)
- Certificate PDF: https://openairdocs.org/files/sha256/a9/5a/a95a7ab16c51ef53601f8ebf4bfde56746bbb890307b3e2fa40ed6e6b554937e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/185C04391BC8AF9E85256CC2000C5C03.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3958SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company DC-10-10 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE))
- The Boeing Company DC-10-30 ([TCDS A22WE](https://openairdocs.org/tcds/A22WE))

## 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.

BnittiJ Starts of ararrica ^Department of transportation -federal Htoiation administration mpplemental t^gpe Certificate SA3958SW-D I American Airlines P.O. BOX 582809 MD208 Tulsa, Oklahoma 74158-2809 ^ ' j&f rederai Aviation *-Slt*zttta&0-nA>.

MCDONNELL DOUGLAS DC 10-10 & DC 10-30 Installation of single Mode S transponder system on DC10-10 per ECO R3816XX, dated 09-15-89, and one Prototype Form 7721/F2 dated 12-14-89 or later DAS1SW approved revision. Installation of single Mode S transponder system on DC10-30 per ECO R3820XX, dated 11-07-90, and two Prototype Form 7721/F3 dated 01-16-91 or later DAS1SW approved revision.

This approval should not be incorporated in any aircraft of this specific model until compatibility of this modification with other previously approved modifications has been determined by the installer.

c^>4^x*Wi/<2c<z^^«^<^Jll^ykWi>z^ r/^ My 5, C/i , s. ' f/ t / /.s^'"*'f'-AAnn-rre- r^ L ^^.i .•.«<••*« -Sact-*itttstut**f • , -..^ . ^ . . .

^ December 18th, 1989 January 20, 1991 Amendment 1

f.ftgn<i/ur^ DAS1SW Coordinator- (Tillt)

FAAFoxx 8110-2 (10-68)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and ^1P code) from (Name of grantor) (Print or type) .

(Address of grantor) (Number and street) (City, State, and <7P code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- January 20, 1991: Amended, Current. [certificate](https://openairdocs.org/files/sha256/a9/5a/a95a7ab16c51ef53601f8ebf4bfde56746bbb890307b3e2fa40ed6e6b554937e)

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