# STC SA556EA-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: Convert interior passenger arrangement to winter configuration of 4 first class lounge, 32 first class seats and 101 tourist class seats by adding two rows of F/C seats
- Applied: April 28, 1969
- Status date: September 18, 1969
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 4A26](https://openairdocs.org/tcds/4A26)
- Certificate PDF: https://openairdocs.org/files/sha256/92/ba/92ba3e2ee231c71a24d664c81fb42ed9ae2d7336c0e517e1759fe53399997d21
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/1E3DD5F274598DF486257EE0006B79AA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA556EA-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 707-300B Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))

## 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: SA5568A-D ......

This certificate issued to: American Airlines, Inc.

Maintenance & Engineering Center Tulsa, Oklahoma Certifies that the change in the type design for the felliwing freduct with the limitations and conditions thereforurspecifudheronmeets thoainvorthinesaregurementa/Part 25 ofthe Federal Aviation Regulations:

Original Product -Typolartificate Number: 4126 Make: Boeing Model: 707-3238 Description of Type Design Change:

Convert interior passenger arrangement to the winter configuration of 4 first class lounge, 32 first class seats, and 101 tourist class seats by adding two rows of F/C seats in accordance with American Airlines Engineering Change Order B.03538 dated 9/16/69 and the drawing as listed on Engineering Change Order B.03538 dated 9/16/69.

This approval should not be extended to other specific aircraft of this model on which other approved modifications are incorporated, unless it is determined that interrelationship between this change and any of those other previously incorporated approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

P. Hannen (Signatur:)

Coordinator DAS 1EA 47 FAAF-18110 2(10-69)

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 & street) (City, State, and ZIP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink) :

## Every issue (1)

- September 18, 1969: Amended, Current. [certificate](https://openairdocs.org/files/sha256/92/ba/92ba3e2ee231c71a24d664c81fb42ed9ae2d7336c0e517e1759fe53399997d21)

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