# STC SA4953NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aviation Technical Services, United States
- Description: Interior rearrangement.
- Applied: January 18, 1990
- Status date: October 24, 2018
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/3d/5c/3d5ca665eaa7626209b2489b0eb0dbaceb3b58945863294f89d9a7dac680bc3b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A840650543E24B1A86258335004C0840.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4953NM

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 737-400 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

## 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.

Un ited S tates of Am erica Department of Transportation - Federal Aviation Administration Supplemental Type Certificate

Number SA4953NM

This certificate, issued to Aviation Technical Services 3121 109th Street SW Everett, WA 98204-3500

Part 25 of the Federal Aviation Regulations. (See Type Certification Data Sheet A16WE for complete certification basis) Original ProductType Certificate Number: A16WE Make: Boeing Model: 737-4Y0

Description of the Type Design Change: Interior rearrangement in accordance with Tramco Top Drawing 90- 033, Revision A, Dated May 31, 1990, or later FAA approved revisions.

Limitations and Conditions: The approval of this change in type design applies basically to the above model aircraft only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the relationship between this change and any of those other previously approved modifications including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and Top Drawing Number 90-033 must be maintained as part of the permanent records for the modified aircraft.

Date of application: January 18, 1990 Date reissued: October 24, 2018 Date of issuance: July 6, 1990 Date amended:

FAA FORM 8110-2 (5/14) PAGE 1 OF 2 PAGES By direction of the Administrator

(Signature)

Manager, Seattle ACO Branch (Title)

## Every issue (2)

- October 24, 2018: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/3d/5c/3d5ca665eaa7626209b2489b0eb0dbaceb3b58945863294f89d9a7dac680bc3b)
- July 6, 1990: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/a8/8b/a88ba577cbabd5b8dcc7812c6d0247ba3d41aee998000aba227cd699095b5ec3)

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