# STC SA3912SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: ECO R3330 (1-13-83) installs an optional auxiliary terminal and H.F. modem as an extension of the basic ACARS system.
- Applied: November 5, 1982
- Status date: August 18, 1983
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A22WE](https://openairdocs.org/tcds/A22WE)
- Certificate PDF: https://openairdocs.org/files/sha256/98/3e/983e01c5aea5cd6a5c8850ce6879834d2c7f2df5c9e1fb888eac5cb3e2905339
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/540833F592877D7D85256CC2000C5B88.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3912SW-D

## ADs that name it (0)

None.

## Approved models (1)

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

## 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 SA3912SW-D This certificate issued to: American Airlines, Inc.

Maintenance & Engineering Center Tulsa, Oklahoma 74151 Part 25 of the Federal Regulations: Aviation Original Product - Type Certificate Number: A22WE Мако: McDonnell Douglas Model: DC-10-30 Description of Type Design Change:

ECO R3330 (1-13-83) installs an Optional Auxiliary Terminal and H.F. Modem as an extension of the basic ACARS system for conducting ACARS data communications in the H.F. (overwater) environment.

This approval should not be incorporated in any aircraft of this specific model on which other approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the aircraft.

Date of Application: November 5, 1982 Sale weissued:

Date of Issuance: August 18, 1983 Sale umended:

FEDERAL AVIATION By Direction of the Administrator

a.P. Toell (Signalure ) TOMINISTE ATION Coordinator, DAS 1SW (Title)

47.

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)

- August 18, 1983: Issued, Current. [certificate](https://openairdocs.org/files/sha256/98/3e/983e01c5aea5cd6a5c8850ce6879834d2c7f2df5c9e1fb888eac5cb3e2905339)

---
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.