# STC SA02125SE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Lyle K. Hockenson, United States
- Description: Installation of a Continental E-225-4 engine, a Hartzell HC-12V20-7D propeller with V8433N blades, and associated accessories and hardware with the existing updraft cooling system in Navion A, serial number (s/n) NAV-4-182 4 per Substantiating Data for E-225 Engine Installation In Navion A Model Aircraft , document number WD189-D11, Revision IR, dated December 10, 2010.  Maintenance shall be per the Instructions for Continued Airworthiness (ICA) Document WD189-ICA, Revision (A), dated March 28, 2011, or later FAA-approved revision.
- Applied: October 16, 2010
- Status date: April 22, 2011
- Product: Aircraft, Single-Engine
- Certification basis: Part 21, Part 23
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/15/ce/15ce26373f2aac27dee1801d119c2122864103179ecef17e57b0d4a8665448a7
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/30C1ED8DE213B3198625787D004B9F6D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA02125SE

## ADs that name it (0)

None.

## Approved models (1)

- Sierra Hotel Aero Inc. Navion A (Army L-17B and L-17C) ([TCDS A-782](https://openairdocs.org/tcds/A-782))

## 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 SA02125SE

This certificate, issued to: Lyle K. Hockenson 3443 ½ Academy Drive SE Auburn, WA 98092-7340

Part 23 of the Federal Aviation Regulations.

Original ProductType Certificate Number: A-782 Make: Sierra Hotel Aero, Inc.

Model: Navion A

Description of the Type Design Change: Installation of a Continental E-225-4 engine, a Hartzell HC-12V20-7D propeller with V8433N blades, and associated accessories and hardware with the existing updraft cooling system in Navion A, serial number (s/n) NAV-4-1824 per “Substantiating Data for E-225 Engine Installation In Navion A Model Aircraft”, document number WD189-D11, Revision IR, dated December 10, 2010. Maintenance shall be per the Instructions for Continued Airworthiness (ICA) Document WD189-ICA, Revision (A), dated March 28, 2011, or later FAA-approved revision.

Limitations and Conditions: Approval of this change in type design applies to aircraft serial number NAV- 4-1824 only. The airplane modified in accordance with this STC must be operated in accordance with the FAA-approved Airplane Flight Manual Supplement (AFMS), document number WD189-AFM, Revision (A), dated April 7, 2011, or later FAA-approved revision. A copy of this certificate, the ICA, and the AFMS must be maintained as part of the permanent records for the modified aircraft.

Date of application: October 16, 2010 Date reissued:

Date of issuance: April 22, 2011 Date amended:

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title) Original Signed by Robert H. Duffer

## Every issue (1)

- April 22, 2011: Issued, Current. [certificate](https://openairdocs.org/files/sha256/15/ce/15ce26373f2aac27dee1801d119c2122864103179ecef17e57b0d4a8665448a7)

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