# STC SA01661SE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Olde Thyme Aviation, United States
- Description: Install a Continental W670-23 engine
- Applied: November 6, 2003
- Status date: March 31, 2006
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS ATC 528](https://openairdocs.org/tcds/ATC%20528)
- Certificate PDF: https://openairdocs.org/files/sha256/4a/3a/4a3a57b0b85105f893a8fb695ad3a094fbd141c946e6291b55ca16f595d15161
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7F91E1600D295CEF8625715400581B6B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA01661SE

## ADs that name it (0)

None.

## Approved models (1)

- The Waco Aircraft Company UKC ([TCDS ATC 528](https://openairdocs.org/tcds/ATC%20528))

## 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.

Number SA01661SE

This certificate, issued to Olde Thyme Aviation 21704 141st Ave. SW Vashon Island, WA 98070 Type Certificate ATC 528.

Original ProductType Certificate Number: ATC 528 Make: Waco Model: UKC

Description of the Type Design Change: Install a Continental W670-23 engine in the above model airplane in accordance with Olde Thyme Aviation Pictures 1 through 36, and Olde Thyme Aviation Installation Report OTA-3-1-06 dated March 20, 2006.

Limitations and Conditions: Data pertaining to this modification are considered inadequate for duplication in other aircraft. This approval is therefore limited to the installation in Waco UKC airplane serial number 3978, registration N14611 only. A copy of this certificate, and the Airplane Flight Manual Supplement dated March 31, 2006 shall be maintained as part of the permanent records for the modified aircraft.

Date of application: November 6, 2003 Date reissued:

Date of issuance: March 31, 2006 Date amended:

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- March 31, 2006: Issued, Current. [certificate](https://openairdocs.org/files/sha256/4a/3a/4a3a57b0b85105f893a8fb695ad3a094fbd141c946e6291b55ca16f595d15161)

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