# STC SA3-294

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sabreliner Aviation LLC, United States
- Description: Installation of airstep door safety chair and release mechanism.
- Applied: June 19, 1958
- Status date: March 7, 2014
- 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/sha256/42/57/425782652cedad4d14cf3a8044d66f584cd9a5233a5d5e2777e30e6cf25c19fe
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/4ED7386368816FFB86257D6D006BA0D8.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-294

## 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 SA3-294 Sabreliner Aviation, LLC.

1390 Highway H Perryville, MO 63775 4b 1 Civil Air Regulations A-618 & A-669 DC-3 All Models Installation of Airstep Door Safety Chair and Release Mechanism. Data Required: Remmert-Werner Drawings SK10193 and SK10197, or later FAA approved revision.

Limited to aircraft with Remmert-Werner Airstep Door SK10075 installed

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

Douglas October 1, 1970; March 25, 1981; March 7, 2014 June 19, 1958 July 7, 1958 Grant E. Youngdahl Program Manager Wichita Aircraft Certification Office

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

To (Name and address of transferee)

From (Name and address of grantor)

## Every issue (1)

- March 7, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/42/57/425782652cedad4d14cf3a8044d66f584cd9a5233a5d5e2777e30e6cf25c19fe)

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