# STC SA3940SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: Install floor proximity emergency path markings
- Applied: April 2, 1987
- Status date: April 9, 1987
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/e5/fd/e5fda8e3d3e692697a8edb810f6018b80d7f39ba65eb56beebe02c23029b8706
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BDC5A6144662F58E85256CC2000C5BD7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3940SW-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747SP Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

## 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.

Hrritri Starts or amenta Bepartmcnt of "transportation —federal 2toiation administration Supplemental 'Cgpe Certificate SA3940SW-D . .'t*aM£a£u r,'/r<* na( • American Airlines, Inc.

Maintenance & Engineering Center Tulsa, Oklahoma 74151 -cn nGt*' *> rncc&i. 2 5 x^« Federal A V 1° 3 t i 0 n A20WE Boeing Airplane Co.

747SP - 31 £X-^//ySi£ _/ ^c&ia Install floor proximity emergency" path markings in compliance with FAR Amendments25-58 and 121-183 per ECO Y3001 , rev A.

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 interrelationships between this change and any of those other previously incorporated approved modifications will introduce no adverse affect upon theairworthiness of that aircraft.

SxdmtnmJt'a&rr^ : 4/2/87 4/9/87 A. P. Voeller(Signature) DAS-ISW Coordinator (Title)

This certificate may be transferred in accordance with FAR 21.17.

FAA FotM 1110-2 (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 <7/> code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and <7F code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

## Every issue (1)

- April 9, 1987: Issued, Current. [certificate](https://openairdocs.org/files/sha256/e5/fd/e5fda8e3d3e692697a8edb810f6018b80d7f39ba65eb56beebe02c23029b8706)

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