# STC SA3977SW-D

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: American Airlines Inc, United States
- Description: Modify the passenger cabin interior seating configuration for increased access to Type III overwing emergency exits.
- Applied: November 2, 1992
- Status date: June 28, 1993
- 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/f4/ac/f4acf64ccdbc780a7c0c006ccf15d72b84e7bf68e5ba9b91457faeaaa2fb4592
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3E96E32CAFDF753285256CC2000C5C31.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3977SW-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

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.

©qjartment of tansportanon—federal Strianon administration Supplemental 'Cjipe Certificate SA3977SW-D American-Airlines, Inc.

P.O. Box 582809 MD 208Tulsa, OK 74158-2809 £/£*»w^/^^ 25 -*fa&0 Federal Aviation McDonnell Douglas DC9-82 and -83 Modify the passenger cabin interior seating configuration for increased access to the Type III overwing emergency exits, per E.C.O. K1810XX dated 4/12/93 and three prototype revision forms 7721-3 dated 6/18/93, 6/25/93 and 6/25/93 or later DAS1SW approved revisions.

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

<$zdrrt*ai*&&a£yp'd' 11/2/92 ^Uyb^MOT.- 6/28/93 rdvr«e£j>rv^^A&<5y!cvrnJviiAifoa£rp' E.J. (Signature) DAS1SW Coordinator (Titlt)

FAA Font 8110-2(10-48)

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and <Y/> code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and <7/> code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):.

## Every issue (1)

- June 28, 1993: Issued, Current. [certificate](https://openairdocs.org/files/sha256/f4/ac/f4acf64ccdbc780a7c0c006ccf15d72b84e7bf68e5ba9b91457faeaaa2fb4592)

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