# STC SA528WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: United Airlines Inc, United States
- Description: Interior modifications for two 85 occupant configurations and rework of seats to provide removable arm rests as described on United Air Lines Approved Drawing List Nos. COA 6-3023 dated October 14, 1963, COA 6-3036 dated October 28, 1963, and COA 6-3053, Revision B, dated August 21, 1964.
- Applied: September 6, 1963
- Status date: November 30, 2011
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A4](https://openairdocs.org/tcds/6A4)
- Certificate PDF: https://openairdocs.org/files/sha256/89/45/894593e6397d2853b832391d10871c4670ed86e0d0b0d915d5b32a766ad016fd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DB7903E541116FDF8625799500740F0A.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA528WE

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company DC-6B ([TCDS 6A4](https://openairdocs.org/tcds/6A4))

## 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 dated October 1, 1949.

6A4

Boeing

DC-6B Description of Type Design Change: Interior modifications for two 85 occupant configurations and rework of seats to provide removable arm rests as described on United Air Lines Approved Drawing List Nos. COA 6-3023 dated October 14, 1963, COA 6-3036 dated October 28, 1963, and COA 6-3053, Revision B, dated August 21, 1964.

Limitations and Conditions: The approval of this change in type design applies basically to Standard Model DC-6B only. This approval should not be exte nded to other specific airplanes of this model on which other previously approved modifications ar e incorporated, unless it is determined that the interrelationship between this cha nge and any of those other previ ously 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: September 6, 1963

Date of issuance: October 10, 1963

Date reissued: November 29, 1963, August 27, 1964, 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 (1)

- November 30, 2011: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/89/45/894593e6397d2853b832391d10871c4670ed86e0d0b0d915d5b32a766ad016fd)

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