# STC SA2-47

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: The original mechanical carburetor heat valve control, R & L engine, replaced with an electric actuator for controlling the R & L engine carburetor heat valve movement.
- Applied: December 3, 1956
- Status date: August 31, 2000
- 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/eb/71/eb713921cd785acc25e6ef598e2e522971292ad91ecc9b7647d12411e430766e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/599EE665611BC13F85256CC10083D48F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-47

## 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.

JHmtrft jStatf a ©f f&ttiErira pepartment of ^transportation - Jifehcral jAotation (Eerttfit&te SA2-47 signature Flight Support Corporation, a Delaware Corporation 7511 Lernmon Avenue, Hangar C Dallas, TX 75209 A& axf Aero/Bulletin 7A of the Bureau of Air Commerce A-669 McDonriell Douglas DC-3C The original mechanical carburetor heat valve control, R S L engine, replaced with an electric actuator for controlling the R & L engine carburetor heat valve movement. EAS Drawing #353010 Change A, 12/3/56, shows the actuator mounting and Dwg. #352354 Change A shows the actuator circuit.

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

.-December 03, 1956 January 28, 1957 ; 12/21/98; 8/31/00 .-4/10/81; 1/5/82 Rev. 2 (Signature) JL.

S. Frances Cox Manager, Special Certification Office, Southwest Region (TVffe) lj punishablv by a tint at not ene**dlng $1,000, or Imprisonment not n0 J yejrj, or both, FA* Form 8110-!(10-66) Page 1 of 2 cmrtiflcttf l"*y b* tronaffrrfti in wJth FAR 21.47*

[ NS FRUC I lONSi 1 he transfer cndiirstmt-ni helow may he used lo notify the appropriaK; h'AA Regional Office of I he transfer of ihis Supplemental Type Cerlilirate The r'AA will rcisim- ihc remficate in ihc name of the iransfcrcc and forward ii to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number lo (Name of transferee) (Address of transferee) r and i , Stair, and ZIP cod from (Name of grantor) (Print or type) (Address of grantor) (Sr'umfrei and sttfct f (City. Stall, and %}P inde) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 69-5538**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/eb/71/eb713921cd785acc25e6ef598e2e522971292ad91ecc9b7647d12411e430766e)

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