# STC SA3-421

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Sabreliner Aviation LLC, United States
- Description: Installation of auxiliary power unit.
- Applied: August 7, 1959
- Status date: March 7, 2014
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A6](https://openairdocs.org/tcds/6A6)
- Certificate PDF: https://openairdocs.org/files/sha256/23/30/233058aca9ee97779540c62af3ae5de62dae65d0c48ed52892394d7d627d682c
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/240D2FF85173BCBC86257D6D00710A95.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-421

## ADs that name it (0)

None.

## Approved models (1)

- Kelowna Flightcraft R & D Ltd. 340 ([TCDS 6A6](https://openairdocs.org/tcds/6A6))

## 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 SA3-421 Sabreliner Aviation, LLC.

1390 Highway H Perryville, MO 63775 4b 1 Civil Air Regulations 6A6 340 Auxiliary Power Unit installation. Data Required: Remmert-Werner Drawing No's. SK-10220 Rev. A, SK-10221, SK-10222, and SKE-010026 Rev. A, or later FAA approved revision.

Approved for ground operation only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined by the installer that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that aircraft.

Convair October 1, 1970; March 25, 1981; June 30, 1983;

March 7, 2014 February 12, 1962 August 7, 1959 August 7, 1959 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/sha256/23/30/233058aca9ee97779540c62af3ae5de62dae65d0c48ed52892394d7d627d682c)

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