# STC SA3925SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Install floor proximity emergency path markings
- Applied: March 12, 1986
- Status date: June 23, 1987
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A3WE](https://openairdocs.org/tcds/A3WE)
- Certificate PDF: https://openairdocs.org/files/sha256/f5/40/f54051ea3222b7a5b75af2015eef0f2e1e44d4a76062baa5515104337daf23b2
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BD642828C216A86685256CC2000C5BA5.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3925SW-D

## ADs that name it (0)

None.

## Approved models (2)

- 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))

## 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: SA3925 SW-D This certificate issued to: 14 American Airines, inc.

Maintenance & Engineering Center Tulsa, OK 74151 Purt Ab of the CiVil Air Hegulations.

Original Product - Type Penificate Number: AWE Make: Boeing Airplane Co.

Model: 727-23, -35, -123 Description of Type Design Change:

Install floor proximity emergency path markings in compliance with FAR amendments 25-58 and 121-183 per ECO R3041.

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

Date of Application: 03/12/86 Date Reissued:

Date of Issuance: 04/02/86 Date Amended: 6/23/87 FEDERAL By Direction of the Administrator (Signature ) COMINIS A. P. Voeller DAS-1SW Coordinator (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)

- June 23, 1987: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f5/40/f54051ea3222b7a5b75af2015eef0f2e1e44d4a76062baa5515104337daf23b2)

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