# STC SA7173SW-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: S-TEC Corporation, United States
- Description: Installation of S-TEC manual electric trim system, Model ST-430.
- Applied: February 18, 1988
- Status date: August 9, 1991
- 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/b9/a8/b9a80f2bffc5f59eea0af2e6ea0507b93ca79b3f7d5c36dc06a2281bf3803015
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/ADA9DE6CDB1715C885256CC20056A1D4.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA7173SW-D

## ADs that name it (0)

None.

## Approved models (12)

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

## 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.

$otn Btparonmt of 'transportation—federal 2triation administration Supplemental t^pc Certificate SA7173SW-D w^JU-i»iSj/f,-mtfn Attitt/j* S-TEC Corporation Rt. 4, Bldg. 946 Wolters Industrial Complex Mineral Wells, Texas 76067 ^^jArJUtv^finK^^^^Jim*^^ *w^ki^««y.,.-,«m«MAy^2^ 3 y^ Civil Air 3 A10 Cessna 3101, 310J, E310J, 310K, 310L, 310N, 310P, T310P, 310Q, T310Q, 310R, and T310R Installation of S-TEC Manual Electric Trim System, Model ST-430, according to Bulletin No. 530, Revision 1, dated 7-26-91 and Master Drawing List No. 92468, Revision A, dated 7-26-91 and/or later FAA Approved revisions of the above data (28 Volt System)

1. Also eligible on Models 3101, 310J, E310J, 310K, 310L, and 310N when modified per 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.)

/.^.4^yU>f-<&^.<z^^^ u4*«v*iA^&^Zor*Tiin*£^ »&~/ 2-18-88 £L^~.nt,.J. 8-09-91, Revision 1 2-22-88 3L&.*m William 3. Thomas DAS Staff Coordinator. DAS 5 SW (Title) ~~ 3 years, or both.

Tkii tertiftatt mty be tnuaftmd in ucntJana wi'lA FAR 21.17.

fbriod £cun af 3amca Bqrartment of Transportation— .federal Station administration Supplemental ICgpe Certificate(Continuation .Sheet) SA7173SW-D, Revision 1 Limitations and Conditions (con't.)

3. FAA Approved Supplemental Flight Manual, P/N 89774, dated 2-22-88 is required for Cessna Models 3101, 310J, E310J, 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 Supplemental Flight Manual, P/N 89774-1, dated 8-09-91 is required for Cessna Models 3101, 310J, E310J, 310K, 310L, and 310N and the above models when modified per STC SA412SO (300 H.P. Colemill Conversion); 310P, T310P, 310Q, T310Q;

and T310P and T310Q when modified per STC SA2750SW (RAM Modification) 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 89775, dated 2-22-88 is required for Cessna Model 310R and/or later FAA Approved revisions of the above supplement.

6. FAA Approved Supplement to Pilot's Operating Handbook and/or FAA Approved Airplane Flight Manual, P/N 89775-1, dated 8-09-91 is required for Cessna Models 310R and T310R 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.

.•Iriv alteration of this artijuatt is punishablt by a fait of not exceeding SI,OOP, or imprisonment not exceeding 3 years, or bnlh.

FORM «iia.j.| (t»M) Tint ttrttfcaU may i* trmtfirrtd in attonlaaet with FAR 21.17.

or 2

INSTRUCTIONS : The transfer endorsement below may be used to notify the appropriate FAA Regional Office of the transfer of this Supplemental Type Certificate.

The FAA will reissue the certificate in the name of the transferre and forward it to him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (9{ame of transferee) (Address of transferee) ___ (%{ujn6er and street) (City, State, andZlT code) from (9{ame of grantor) (frint or type) ^ ___ ___ (Address of grantor) ___ (9{um6er ant street) (City, State, andZlf cade) Exent of Authority (if licensing agreement) :

Signature of grantor (In Page 2 of ?.

## Every issue (1)

- August 9, 1991: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b9/a8/b9a80f2bffc5f59eea0af2e6ea0507b93ca79b3f7d5c36dc06a2281bf3803015)

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