# STC SA555EA-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: American Airlines Inc, United States
- Description: To comply with FAR 25.812(e), a lever lock switch will be installed at a point accessible to the forward flight attendant seat and the necessary circuitry will be installed to allow the flight attendant to turn the emergency lights "on"
- Applied: April 7, 1969
- Status date: January 26, 1970
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A5EU](https://openairdocs.org/tcds/A5EU), [TCDS 4A21](https://openairdocs.org/tcds/4A21), [TCDS 4A26](https://openairdocs.org/tcds/4A26), [TCDS 4A28](https://openairdocs.org/tcds/4A28)
- Certificate PDF: https://openairdocs.org/files/sha256/14/35/1435242b7216e47d9e5ecb33d776f4265ccfa6ee3d22f50fbac77d4f7ae2835d
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D2CCE705A21296A786257EE00061AA66.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA555EA-D

## ADs that name it (0)

None.

## Approved models (6)

- Airbus BAC 1-11 400 Series ([TCDS A5EU](https://openairdocs.org/tcds/A5EU))
- The Boeing Company 707-100 Long Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-100B Long Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-100B Short Body ([TCDS 4A21](https://openairdocs.org/tcds/4A21))
- The Boeing Company 707-300C Series ([TCDS 4A26](https://openairdocs.org/tcds/4A26))
- The Boeing Company 720B Series ([TCDS 4A28](https://openairdocs.org/tcds/4A28))

## 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 SA555EA-D This certificate issued to: American Airlines, Inc.

Maintenance & Engineering Center Tulsa, Oklahoma 74151 Part 25 of the Federal Alr Regulations.

Original Product - Type Pertificate Number: 4A21 4A26 4A28 ASEU Make: Boeing Boeing Boeing British Acft. Corp.

707-123B 707-323CC 720-023B 401/AK Model: 707-138 Description of Type Design Change: To comp1y with FAR 25.812 (e), a lever 10ck switch ill be installed at a point accessible to the forward flight attendant seat an the necessary circuitry will be installed to allow the flight attendant to turn the emergency lights "on". Engineering Change Orders: (1) B.03411 Revision A 707-123B, 707-138, and 720-023B, (2) B.03412 Revision D 707-323CC, (3) U.00878 Revision A BAC 1-11 401/AK, provide the details and instructions required to make the change.

This approval shall not be incorporated in any aircraft of these specific models on which other approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the aircraft.

Date of Application: 4/7/69 Date Reissued:

L'ate sf isimance 4/13/69 Date Amended: 4/23/69,4/30/69,1/26/70 By Direction of the Administrator W.P.Hannan (Signature ) ADMINIST Coordinator DAS lEA (Title) 47 FAA FORM 8110-2 (10-68)

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and Z1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and Z1P code) Exent of Authority (if licensing agreement) :

Signature of grantor (In ink) :

Page of 2

## Every issue (1)

- January 26, 1970: Amended, Current. [certificate](https://openairdocs.org/files/sha256/14/35/1435242b7216e47d9e5ecb33d776f4265ccfa6ee3d22f50fbac77d4f7ae2835d)

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