# STC SA3-113

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Preferred Improvements LLC, United States
- Description: Installation of RCA Model AVQ-10 radar antenna swingaway mount SK10136 (SA3-65).
- Applied: September 11, 1957
- Status date: December 13, 2017
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- Certificate PDF: https://openairdocs.org/files/sha256/ed/98/ed9876f03b87bb9587e9ad63d69f8b4bcea498afdd3d9d13fd4f9651ef3a78b4
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B1E4FAE6D67BDFFF86258211005E1932.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-113

## ADs that name it (0)

None.

## Approved models (4)

- The Boeing Company DC3C-R-1830-90C ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3C-S1C3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3C-S4C4G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3C-SC3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))

## 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.

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

Part of the

Signature

Title SA3-113 Preferred Improvements, LLC 11234 Hackett Road Apple Creek, OH 44606 4a 2 Civil Air Regulations A-669 DC-3C Installation of RCA Model AVQ-10 Radar Antenna Swing-Away Mount SK10136 (SA3-65). Data required:

Remmert-Werner Drawings SK10166 and SK10136, or later FAA Approved revision.

This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

Douglas 10/1/70; 3/25/81; 6/30/83; 3/7/14; 12/5/17;

12/13/17 September 11, 1957 October 14, 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 SA3-113

## Every issue (2)

- December 13, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ed/98/ed9876f03b87bb9587e9ad63d69f8b4bcea498afdd3d9d13fd4f9651ef3a78b4)
- March 7, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/a4/f1/a4f14da5ca4d1bdb26fb1ffa86d82b05406c7178256861ccfef1615e2be007b7)

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