# STC SA2821WE-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: Installs additional service cart retractable tie downs at the following locations:  
                Fus. Sta. 476.50, Butt Line 76.15 LH/RH
                Fus. Sta. 1307.00, Butt Line 90.00 RH
                Fus. Sta. 1330.00, Butt Line 68.50 LH
                Fus. Sta. 2234.50, Butt Line 18.00 RH
- Applied: July 23, 1974
- Status date: November 30, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- Certificate PDF: https://openairdocs.org/files/sha256/af/13/af13cf74512885cd18766dcfe0333189d070ace0e7914a919c01622144ce3546
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DF6E1CB14459342E86257992004D6B5C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2821WE-D

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-100 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.

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 25 of the Federal Aviation Regulations.

A20WE

Boeing

747-122 Description of Type Design Change: Installs additional service cart retractable tie downs at the following locations:

Fus. Sta. 476.50, Butt Line 76.15 LH/RH Fus. Sta. 1307.00, Butt Line 90.00 RH Fus. Sta. 1330.00, Butt Line 68.50 LH Fus. Sta. 2234.50, Butt Line 18.00 RH

Limitations and Conditions: This approval should not be extended to other specific aircraft of this model on which other previously approved modifications are incorporated, unless it is determined that the inter-relationship between this change and any of those previously incorporated approved modifications will not introduce any adverse effect upon the airworthiness of the aircraft. 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.

This certificate and the supporting data, which is the basis for approval, shall remain in effect until surrendered, suspended, revoked or a termination date is otherwise established by the Administrator of the Federal Aviation Administration.

Date of application: July 23, 1974

Date of issuance: November 26, 1974

Date reissued: November 30, 2011

( Signature) Haifa Haj-Eid Supervisor, Technical & Administrative Support Staff Los Angeles Aircraft Certification Office ( Title)

NOTE:

**DO NOT DELETE THIS PAGE.**

**DO NOT ADD ANY DATA TO THIS PAGE.**

**THIS PAGE IS FOR PAGE NUMBERING PURPOSES, PLEASE DISCARD PRINTED COPY.**

## Every issue (2)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/af/13/af13cf74512885cd18766dcfe0333189d070ace0e7914a919c01622144ce3546)
- November 26, 1974: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/94/4e/944ea6e2f4806c8b9713ee1e3745955d3cc27e5ec25ecebd173aec44ff954f95)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.