# STC SA3954SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Installation of TCAS system
- Applied: March 31, 1989
- Status date: November 11, 1990
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- Certificate PDF: https://openairdocs.org/files/sha256/0b/c3/0bc38de8ba44deffd312dc1be48b30897737b05f996db69d76142f6e5c3111a9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5203ED2C44D0E29E85256CC2000C5BFE.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3954SW-D

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company DC-9-82 (MD-82) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))
- The Boeing Company DC-9-83 (MD-83) ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number SA3954SW-D This certificate issued to: American Airlines P.O. BOX 582809 MD208 Tulsa, Oklahoma 74158-2809 Purt 25 of the Federal Aviation Regulations.

Original Product -Type bertificate Number: AGWE Make: McDonnell Douglas Model: DC-9-821-83 Description of Type Design Change:

Installation of TCAS System per ECO K1449FX dated 10/29/90 and one Prototype Revision Approval form 7721-3 dated 11/11/90 and ECO K1552CX dated 10/29/90 and one Prototype Revision Approval form 7721-3 dated 11/11/90, 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.

Date of Application: March 31,1989 Jule missued:

April 24, 1990 Amendment 1 Date of Issuance: June 6, 1989 Jake unded: June 20,1990 Amendment 2 November 11, 1990 Amendment 3 FEDERAL AVIATION By Direction of the Administrator (Signature) *MINISTRATO DAS-1SW Coordinator (Tille)

47.

**FAA FORM 6110-2 (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 ZIP code )

• from (Name of grantor) (Print or type) - (Address of grantor) (Number and street) (City, State, and ZIP code ) Extent of Authority (if licensing agreement):

Signature of grantor (In ink): ...

## Every issue (1)

- November 11, 1990: Amended, Current. [certificate](https://openairdocs.org/files/sha256/0b/c3/0bc38de8ba44deffd312dc1be48b30897737b05f996db69d76142f6e5c3111a9)

---
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.