# STC SA2-645

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Pan American World Airways Inc., United States
- Description: Geared Rudder Tab Installation
- Applied: October 30, 1958
- Status date: January 9, 1959
- 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/b6/7a/b67a7fb74a86bf6e9f5235dc31e30735e0a0cfe676644203285bc6d2538dad2b
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C9632F929CFC3CCD86258028005EF8CA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-645

## 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

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (2)

- January 9, 1959: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b6/7a/b67a7fb74a86bf6e9f5235dc31e30735e0a0cfe676644203285bc6d2538dad2b)
- November 3, 1958: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/87/a4/87a43085d8d15a0bfe569ea78bdf071005603063c12712acb8b05c05f9811053)

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