# STC SA8375SW-D

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 50/50 Single Axis Automatic Flight Guidance Systems, Model ST-511-40/50
- Applied: October 22, 1993
- Status date: April 2, 1998
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-782](https://openairdocs.org/tcds/A-782)
- Certificate PDF: https://openairdocs.org/files/sha256/62/dd/62dda88cca4d44c4899e0de5c344921e30e3f1657ec2273fb6f838362e564f8e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DB916A29B9BAE75C8625801200698883.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA8375SW-D

## ADs that name it (0)

None.

## Approved models (7)

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

at Me Me Jlitnttch J&tatcs (§f ,Amcric;v of tEranspm-taimn - ,3[eJn!ra( 3 OLerttftcate SA8375SW-D S-TEC Corporation One S-TEC Way Mineral Wells Municipal Airport Mineral Wells, TX 76067-9236 A-782 Navion A, B, D, E, F, G, and H S S cs/ (7 <7 Installation of S-TEC System 40/50 Single and Two Axis Automatic Flight Guidance Systems, Model ST- 5 1 1-40/50, according to Bulletin No. 61 1, Revision 1, dated 3-30-98 and Master Drawing List No. 92601, Revision A, dated 3-30-98 or later FAA Approved revisions of the above data (14 Volt System).

I Only eligible on Models A, B, D, E, F, G, and H When Modified By Palo Alto Airport, Inc. or Symorf s Engineering Horizontal Stabilizer Angle of Incidence Change.

2. Also eligible on Models A, B, D, E, F, G, and H With or Without Tip Tanks.

3. Also eligible on Models A, B, D, E, F, G, and H When Modified By 285 H.P. Engine Conversion.

(See Continuation Sheet, Page 2, a part of this STC.)

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

YMte a/u/ Ma 4e//i/tel<bHa data ete/iird ib Me daad /<et// <S / (Jatfo e 10-22-93 11-01 -93 4-02-98, Revision 1 (Signature) William }. Thomas DAS Staff Coordinator, DAS 5 SW (Title)

•HUiitcti j&tntcs QDf .America .HBepariment at tHrmtspartattott - ^Jfeheral JX&tattnn JX.hmtmstrattnn (Eerttftcate SA8375SW-D, Revision 1 Limitations and Conditions (con't.)

4. FAA/DAS Approved Supplemental Flight Manual, P/N 891036, dated 1 1-01-93 is required for Navion Models A, Bs D, E, and F When Modified Per STC SA4-241 (Stabilizer Modification) and STC SA4-915 (Tip Tanks) And The Above Models When Modified By 285 H.P. Engine Conversion for S-TEC System 40 or later FAA Approved revisions of the above supplement.

5. FAA/DAS Approved Supplemental Flight Manual, P/N 891036, Revision 1, dated 4-02-98 is required for Navion Models A, B, D, E, F, G, and H When Modified By Palo Alto Airport, Inc. or Symon's Engineering Horizontal Stabilizer Angle of Incidence Change With or Without Tip Tanks And The Above Models When Modified By 285 H.P. Engine Conversion for S-TEC System 40 or later FAA Approved revisions of the above supplement.

6. FAA/DAS Approved Supplemental Flight Manual, P/N 891037, dated 1 1-01-93 is required for Navion Models A, B, D, E, and F When Modified Per STC SA4-241 (Stabilizer Modification) and STC SA4-915 (Tip Tanks) And The Above Models When Modified By 285 H.P. Engine Conversion for S-TEC System 50 or later FAA Approved revisions of the above supplement.

7. FAA/DAS Approved Supplemental Flight Manual, P/N 891037, Revision 1, dated 4-02-98 is required for Navion Models A, B, D, E, F, G, and H When Modified By Palo Alto Airport, Inc. or Symon's Engineering Horizontal Stabilizer Angle of Incidence Change With or Without Tip Tanks And The Above Models When Modified By 285 H.P. Engine Conversion for S-TEC System 50 or later FAA Approved revisions of the above supplement.

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

FAA Form 8110-2-1(10-69) Page 2 of 2

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee).

(Address of transferee). (Number and street) (City, State, and ZIP code) from (Name of grantor) (Print or type).

(Address of grantor) (Number and street) (City, State, and ^IP code) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):.

## Every issue (1)

- April 2, 1998: Amended, Current. [certificate](https://openairdocs.org/files/sha256/62/dd/62dda88cca4d44c4899e0de5c344921e30e3f1657ec2273fb6f838362e564f8e)

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