STC SA3-139

Supplemental type certificate · Preferred Improvements LLC

Holder
Preferred Improvements LLC · United States
Status
Current · Reissued
Status date
December 13, 2017
Applied
November 11, 1957
Product
Aircraft · Large Airplane
Certification basis
Part 21
Data sheet
TCDSA-669

From FAA DRS, with our copy of the certificate PDF. DRS record last changed December 6, 2025.

What it approves

Installation of standard C-47 cargo door.

What the certificate says

From the PDF’s text layer, without the form’s printed wording. Layout and order may differ; the PDF is the record.

FAA Form 8110-2 (5/14) Page 1 of

Part of the

Signature

Title SA3-139 Preferred Improvements, LLC 11234 Hackett Road Apple Creek, OH 44606 4a 2 Civil Air Regulations A-669 DC-3C Installation of Standard C-47 Cargo Door. Data required: Remmert-Werner Drawings No's. SK-10322, SK-10323 ( 2 sheets), SK-10325, SK-10180, or later FAA Approved revision.

Compatibility of this modification with other previously approved modification must be determined by the installer.

Douglas 10/1/70; 3/25/81; 3/7/14; 12/5/17; 12/13/17 July 14, 1960 November 11, 1957 December 4, 1957 Grant E. Youngdahl Program Manager Wichita ACO Branch

FAA Form 8110-2 (5/14) Page 2 of

To (Name and address of transferee)

From (Name and address of grantor)

2 SA3-139

ADs that name this STC · 0

An AD can apply because an STC is installed, or mention one in its text.

No AD in this release names this STC

Approved models · 4

MakeModelData sheet
The Boeing CompanyDC3C-R-1830-90CA-669
The Boeing CompanyDC3C-S1C3GA-669
The Boeing CompanyDC3C-S4C4GA-669
The Boeing CompanyDC3C-SC3GA-669

Every issue · 2

DRS keeps each issue of an STC as its own record, with its own certificate and attachments.

DateStatusFiles
December 13, 2017Reissued, currentCertificate
March 7, 2014Reissued, earlier issueCertificate