# STC SA353WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: United Air Lines B-720-022 Cabin Interior Arrangement (one class) five abreast seating
- Applied: February 7, 1963
- Status date: November 30, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 4A28](https://openairdocs.org/tcds/4A28)
- Certificate PDF: https://openairdocs.org/files/sha256/cb/0b/cb0b2adff2c11f77e055cd691950b91adb873c7bd727e86b546eb748c6d2dada
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/5842C3F83A13CC9E86257997006F0DE0.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA353WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 720 Series ([TCDS 4A28](https://openairdocs.org/tcds/4A28))

## 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.

600 Jefferson Street Houston, Texas 77002 Part 4b of the Civil Air Regulations.

4A28

Boeing

720-022 Description of Type Design Change: United Air Lines B-720-022 Cabin Interior Arrangement (one class) five abreast seating as shown on United Air Lines Drawings 9F-5032 “A”, 6F-8386, 6F-8385, 6F-8382 “A”.

Limitations and Conditions: This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated, unless it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. 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: February 7, 1963

Date of issuance: March 3, 1963

Date reissued: November 30, 2011

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

NOTE:

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## Every issue (1)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/cb/0b/cb0b2adff2c11f77e055cd691950b91adb873c7bd727e86b546eb748c6d2dada)

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