# STC SA5278SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 60 two axis automatic flight guidance system, Model ST-114, with optional automatic electric trim system.
- Applied: January 25, 1984
- Status date: September 24, 1986
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- Certificate PDF: https://openairdocs.org/files/sha256/6f/43/6f435c5ce473c46778ea059e0f23678e86a56016a26c7ab7e3cb02f0b12a9dfb
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7D6D9B3B54F0A78385256CC200122804.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA5278SW-D

## ADs that name it (0)

None.

## Approved models (1)

- Mooney International Corporation M20K ([TCDS 2A3](https://openairdocs.org/tcds/2A3))

## What the certificate says

This is OCR from the scanned FAA certificate. OCR can misread letters and numbers.

Amited Stares of Suerice Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA52785W-0 This certificate issued to: 11. S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Purd 3 of the CiVil Air Regulations.

Original Product - Type trentificate Number: 2A3 Make: MOONEY Model: M20K Description of Type Design Change:

Installation of S-TEC System 60 Two Axis Automatic Flight Guidance System, Model ST-114, with Optional Automatic Electric Trim System according to Bulletin No.

Z1/, Revision 3, dated 9-12-86 and Master Drawing List No. 92125, Revision C, dated 9-12-86 with Optional Flight Director Steering Horizon and/or later FAA Limitations and Conditions:

1. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89145-1, dated 2-01-84 is required and/or later FAA Approved revisions of the above supplement.

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

Date of Application: 1-25-84 Date Reissued: 9-24-86, Revision 1 Date of Issuance: 2-01-84 Date Amended:

FEDERAL AVIATION By Direction of the Administrator (Signature) OMINISTE TON DAS Staff Coordinator, DAS 5 SW Harold W. Holdeman (Title)

47.

**TAX FORM 6110-2 (10-68)**

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA52785W-D, Revision 1 Limitations and Conditions: (con't)

2. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89145-2, dated 9-24-86 is required and/or later FAA Approved revisions of the above supplement.

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

**47 PAGE 2 OF 2 PAGES**

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 ZIP code) Extent of Authority (if licensing agreement):

Date of Transfer: — Signature of grantor (In ink):

U.S. GOVERNMENT PRINTING OFFICE: 1966 OF--205-579

## Every issue (1)

- September 24, 1986: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6f/43/6f435c5ce473c46778ea059e0f23678e86a56016a26c7ab7e3cb02f0b12a9dfb)

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