# STC SA3-78

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Preferred Improvements LLC, United States
- Description: Alternate Tee-Bolt radome attachment for STC SA3-52 radome installation.
- Applied: July 26, 1957
- Status date: December 13, 2017
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-618](https://openairdocs.org/tcds/A-618), [TCDS A-669](https://openairdocs.org/tcds/A-669)
- Certificate PDF: https://openairdocs.org/files/sha256/de/ea/deeafdd4de3c8c7b5a29aba658cce862f87d8787e5ed2ffb7293d7e04a28e7fd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D8D6C78CE3F7A39086258211005DCE96.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3-78

## ADs that name it (0)

None.

## Approved models (14)

- The Boeing Company DC3-G102 ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- The Boeing Company DC3-G102A ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- The Boeing Company DC3-G103A ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- The Boeing Company DC3-G202A ([TCDS A-618](https://openairdocs.org/tcds/A-618))
- The Boeing Company DC3A-S1C3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3A-S1CG ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3A-S4C4G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3A-SC3G ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- The Boeing Company DC3A-SCG ([TCDS A-669](https://openairdocs.org/tcds/A-669))
- 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))
- The Boeing Company DC3D-R-1830-90C ([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 SA3-78 Preferred Improvements, LLC 11234 Hackett Road Apple Creek, OH 44606 4b 2 Civil Air Regulations A-618 & A-669 DC-3 All Models Alternate Tee-Bolt Radome Attachment for STC SA3-52 Radome Installation. Data required: Remmert-Werner Drawing No. SK-10165 (Ref. Drawing No. SK10087, Rev. C), or later FAA Approved revision.

Limited to aircraft with Radomes installed per STC SA3-52. 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 July 26, 1957 August 7, 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 SA3-78

## Every issue (2)

- December 13, 2017: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/de/ea/deeafdd4de3c8c7b5a29aba658cce862f87d8787e5ed2ffb7293d7e04a28e7fd)
- March 7, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/94/2d/942dd4d28569bf063979b7b016a668442f4bbff78ca68e5e226abd9622be93bf)

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