# STC SA7144SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC System 65 two axis automatic flight guidance system, Model ST-412.
- Applied: March 25, 1987
- Status date: October 16, 1990
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10)
- Certificate PDF: https://openairdocs.org/files/sha256/54/7a/547a47a0683267b09730294ef31c7805ba0932b9609b3e70d8f219d0370b14d9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/46FCD8F897E97B8785256CC20056A1AA.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7144SW-D

## ADs that name it (0)

None.

## Approved models (12)

- Textron Aviation Inc. 310I ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310K ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310L ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310N ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. 310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. E310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. T310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. T310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10))
- Textron Aviation Inc. T310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10))

## What the certificate says

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

Anital Sates & Acri Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number 5A714454-0 This certificate issued to: S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, TX 76067 Part 3 of the CIVII Air Regulations Original Product -TypeContifical Numbos: 3A10 CESSNA Description of Type Design Change: 3310, 3103, E3103, 3100R 31ND T310R, 310P, T310P, 310Q, T310Q, 310R, AND Installation of S-TEC System 65 Two Axis Automatic Flight Guidance System, Model ST-412, according to Bulletin No. 512, Revision 3, dated 7-27-90 and Master Drawing List No. 92442, Revision C, dated 7-27-90 and/or later FAA Approved revisions of the above data (28 Volt System).

1. Also eligible on Models 3101, 3100, E3100, 310K, 310L, and 310N when modified in accordance with STC SA412SO (300 H.P. Colemill Conversion).

2. Also eligible on Models T310P and T310Q When Modified Per STC SA2750SW (RAM Modification).

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

Holdeman DAS Staff Coordinator. DAS 5 SW (Title)

17.

FAN Foom 81 10-2 (10-68)

*niced Stares of Amenra Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA71445W-D, Revision 3 Limitations and Conditions: (con't.)

3. FAA Approved Supplemental Flight Manual, P/N 89734, dated 4-03-87 is required for Cessna Models 3101, 310J, E3100, 310K, 310L, and 310N and the above Models when modified per STC SA412SO (300 H.P. Colemill Conversion) and/or later FAA Approved revisions of the above supplement.

4. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89737, dated 6-17-87 is required for Cessna Model 310R and/or later FAA Approved revisions of the above supplement.

5. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89737-1, dated 8-27-90 is required for Cessna Models 310R and T310R and/or later FAA Approved revisions of the above supplement.

o. FAA Approved Supplemental Flight Manual, P/N 89893, dated 8-27-90 is required for Cessna Models 310P, T310P, 310Q, and T310Q and T310P and T310Q When Modified Per STC SA2750SW (RAM Modification) and/or later FAA Approved revisions of the above supplement.

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

FAA FORM 81102-1 (10-80) This certificate may be transferred in accordance with I'll :1.t7.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address of transferee) (Number and street) (City, State, and Z1P code) from (Name of grantor) (Print or type) (Address of grantor) (Number and street) (City, State, and ZIP code) Exent of Authority (if licensing agreement) :

Signature of grantor (In ink) : .....

## Every issue (1)

- October 16, 1990: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/54/7a/547a47a0683267b09730294ef31c7805ba0932b9609b3e70d8f219d0370b14d9)

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