# STC SA1628WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: Installation of passenger seats in cabin area
- Applied: January 30, 1968
- 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/fd/62/fd6272bc034ff6d2233987d89161b8f8b84dd88ca7e86a31fe2f81eb7f3df6ea
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/8CE55EFE6229D24D8625799E006800D4.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1628WE

## 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.

This Certificate issued to United Air Lines, Inc.

600 Jefferson Street Houston, Texas 77002

Part 4b of the Civil Air Regulations.

4A28

Boeing

720-022 Description of Type Design Change: Installation of passenger seats in cabin area per United Air Lines Change Order Authorization COA 4-1484.

Limitations and Conditions: 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: January 30, 1968

Date of issuance: March 18, 1968

Date reissued: November 30, 2011

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

## Every issue (1)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/fd/62/fd6272bc034ff6d2233987d89161b8f8b84dd88ca7e86a31fe2f81eb7f3df6ea)

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