# STC SA3934SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Installation of single or dual Litton LTN-311 Omega/VLF navigation systems in aircraft with previously approved ONS wiring provisions
- Applied: December 31, 1986
- Status date: February 16, 1993
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/21/74/2174137144187035c186ebf25583886363f043a40dd3f6af762c2fa4feef86b1
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/61019E80A9E172DC85256CC2000C5BC1.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3934SW-D

## ADs that name it (0)

None.

## Approved models (3)

- The Boeing Company 727 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-100 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))
- The Boeing Company 727-200 Series ([TCDS A3WE](https://openairdocs.org/tcds/A3WE))

## 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: SA39345W-D This certificate issued to: American Airlines, Inc.

P. O. Box 582809 Engineering Dept., MD 208 Tulsa, Oklahoma 74158-2809 Purt 4b of the Civil Aviation Regulations.

Original Product -Type Certificate Number: AWE Make: Boeing Model: 727-23,-35,-95,-123, -223,-2A7, -227 Description of Type Design Change:

Installation of single or dual Litton LTN-311 Omega/VLF Navigation Systems (ONS)in aircraft with previously approved ONS wiring provisions. The Litton LTN-311 ONS is installed in accordance with American Airlines Engineering Change Order H3080SX dated 10/08/92 and one Prototype Revision Approval Form 7721-4 dated 11/13/92, or later.DAS1SW approved revisions.

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. This modification is applicable only to aircraft which have been modified in accordance with STC SA3900SW-D.

Modification of aircraft per this STC requires use of American Airlines 727-23 Airplane Flight Manual D6-8727.3 Supplement V (5) dated 2/16/93 or 727-223 Airplane Flight Manual D6-8728.3 Supplement IX (9) dated 2/16/93.

r of the Federal Aviation Administration .

Date of Application: December 31, 1986 Jute missued:

Date of Issuance: March 7, 1987 I ale mended: 8/12/87, 11/6/87, 8/29/88, 6/7/89 2/16/93 Amendment 5 FEDERAL AVIATIO By Direction of the Administrator A. P. Voeller (Signature ) OMINISTRATO DAS1SW Coordinator (Title)

47.

**FAX FORM 8110-2 (10-68)**

TRANSFER ENDORSEMENT Transter 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, Stale, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink): _

## Every issue (1)

- February 16, 1993: Amended, Current. [certificate](https://openairdocs.org/files/sha256/21/74/2174137144187035c186ebf25583886363f043a40dd3f6af762c2fa4feef86b1)

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