# STC SA1604SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Air Services, Inc, United States
- Description: Installation of Aft cargo door between F.S. 661 and F.S. 801.
- Applied: September 18, 1972
- Status date: February 13, 1973
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS 6A4](https://openairdocs.org/tcds/6A4)
- Certificate PDF: https://openairdocs.org/files/sha256/35/db/35db008c893a7e95476265fe31181d7e831fdb9cbf12fa9389050f32ef3714fc
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9FEF58B6B04D51AB85256CC100821442.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1604SW

## 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.

f'U4 United Starts or amrrica ©epartment of transportation —federal aoiarion administration Supplemental 'Cgpe Certificate Air Services, Inc.

P. 0. Box 2 Addlson, Texas 75001 f-n- &#. /-u^it 4teAia/rt Project Mr /t'/fn 212-SEN n in/ r, •„,/,'/,,., t All* Douglas DC-6B /• ^^V" tUa,y*.: ^gtgjj^tlon of aft carco door between F.S. 66l and F.S. 801 according to Data List DL 72-3 dated 2/1/73- This approval is for non-pressurized aircraft onljr.

September 18, 1972 February 13, 1973 f-u, (Signature ) Glen W. Welsh Chief, Engineering and Manufacturing Branch -__- "~,__,_

This cftltficalt may be Iranifttred in accordance with hAR 21.47.

.V INSTRUCTIONS: The transfer endorse merit below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferee and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (.Name of transferee) :

(Address of transferee) : umber and street) lalt, and ZIP code) from (Name of grantor) (Print or type) (Address of grantor) (Number and ttreet) (City, Stale, and £IP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 69-S536**

## Every issue (1)

- February 13, 1973: Issued, Current. [certificate](https://openairdocs.org/files/sha256/35/db/35db008c893a7e95476265fe31181d7e831fdb9cbf12fa9389050f32ef3714fc)

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