# STC SA5024SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: L-3 Communications Integrated Systems LP, United States
- Description: E-4 Airstairs Control Circuitry Modification
- Applied: March 30, 1988
- Status date: March 22, 2013
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25, Part 121, Part 129
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/98/10/9810cbdd9c60173b4429d973da4509742c4d24fdad204f0550ca22ee8ff4e61b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA1D8F54CD94108A86257B4A006A2062.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA5024SW-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-200B 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.

Number SA5024SW-D This Certificate issued to L-3 Communications Integrated Systems, L.P.

10001 Jack Finney Blvd.

Greenville, TX 75402 Part 25 of the Federal Aviation Regulations.

Original Product Type Certificate Number: A20WE Make : Boeing Model : 747-E4 Description of Type Design Change: E-4 Airstairs Control Circuitry Modification in accordance with E-Systems Sealed Drawing List SDL 7455-2 Rev. A dated 15 September 1988 or later FAA approved data.

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

3. When installed, airplanes with this STC are limited to operations excluding those of an Air Carrier. Specifically, no operations under 14 CFR 121, 14 CFR 129 or any foreign Air Carrier are permitted.

Date of application: 30 March 1988 Date reissued : July 29, 2002 Date of issuance : 19 May 1988 Date amended : 26 September 1988, Rev 1;

22 March 2013 - Amdt 2 By direction of the Administrator

(Signature) Michael E. Hopper ODA-750173-SW Administrator, Alternate

(Title)

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)

- March 22, 2013: Amended, Current. [certificate](https://openairdocs.org/files/sha256/98/10/9810cbdd9c60173b4429d973da4509742c4d24fdad204f0550ca22ee8ff4e61b)

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