# STC ST11178SC

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Braddick USA LLC, United States
- Description: Structural modifications necessary for the increase in maximum gross takeoff weight from 26,900 lbs to 29,000 lbs for STC SA3820SW - converted Douglas DC3C aircraft (specific models listed)
- Applied: March 25, 2013
- Status date: February 27, 2018
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- Certificate PDF: https://openairdocs.org/files/sha256/82/9c/829c5364a3c51b4700ec20d144af98e982bbe0b3d1faac6bc3d181c63d562124
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BAE0763820B30B8F862582470063A81C.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST11178SC

## ADs that name it (0)

None.

## Approved models (4)

- 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 This certificate issued to:

Part of the Original Product – Type Certificate Number: Make:

By Direction of the Administrator Signature Title Jim Grigg Manager, Fort Worth ACO Branch Compliance & Airworthiness Division ST11178SC Braddick USA LLC 11234 Hackett Rd Kidron, OH 44636 Federal Aviation Regulations 25 Structural modifications necessary for the increase in maximum gross takeoff weight from 26,900 lbs to 29,000 lbs for STC SA3820SW – converted Douglas DC3C aircraft (specific models listed) in accordance with Master Drawing List DL2-DC3-65TP, Rev. IR, dated October 25, 1991 or later FAA approved revision. Maintenance procedures to be conducted in accordance with PI Supplemental Structural Repair Manual Document No. PIP-2014-01, Rev. IR, dated September 12, 2014 or later FAA approved revision.

(See continuation Sheet 3 of 3) The Boeing Company *DC3C-SC3G, -S1C3G, -S4C4G, -R-1830-90C September 30, 2014 February 27, 2018 March 25, 2013 September 16, 2014 A-669, Rev 32 3

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

To (Name and address of transferee)

From (Name and address of grantor)

3 ST11178SC

FAA Form 8110-2 (5/14) Page 3 of

1. Compatibility of this design change with previously approved modifications must be determined by the installer.

2. Airplane Flight Manual Supplement, DC-3TP, revision original, dated August 2, 2017, or later FAA Approved revision, is required on board this aircraft.

3. A copy of this certificate must be maintained as part of the permanent records for the modified aircraft.

4. If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

NOTE: The FAA has reviewed the applicant’s assessment showing that this modification does not impact the existing electrical wiring interconnection system instructions for continued airworthiness (EWIS ICA) and found that no additional EWIS ICA tasks are required.

Certification Basis:

The Certification Basis for this installation is per Type Certificate Data Sheet A-669, Revision 32 plus the following:

FAR Part 4b, Sections: 100, 101, 160, 161, 162, 173, 200, 201, 202, 210, 211, 212, 213, 214, 215, 216, 217, 220, 221, 223, 224, 225, 226, 227, 230, 231, 232, 233, 234, 235, 236, 300, 301, 302, 303, 304, 305, 306, 307

CFR Part 21, Sections: 33b(1)(2)(3)(4), 35, 37, 39, 101b

CFR part 25, Sections: 101, 103, 105, 107, 109, 111, 113, 115, 125, 149, 251, 1505, 1533, 1581, 1583(b)(f)(g)(h), 1587

----------END---------- ST11178SC

## Every issue (2)

- February 27, 2018: Amended, Current. [certificate](https://openairdocs.org/files/sha256/82/9c/829c5364a3c51b4700ec20d144af98e982bbe0b3d1faac6bc3d181c63d562124)
- September 30, 2014: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/72/15/7215c27d48a1d903fe6f47ebdf240fb991c4f6f72f1e057498be0edc78c1064c)

---
From OpenAirDocs.org, an independent open copy of FAA and NTSB data. Only the Federal Register edition on govinfo.gov is the official legal text of an AD.