# STC SA2-303

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Signature Flight Support Corporation, United States
- Description: Installation of Sperry A-12 autopilot.
- Applied: November 13, 1957
- Status date: August 31, 2000
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A-723](https://openairdocs.org/tcds/A-723)
- Certificate PDF: https://openairdocs.org/files/sha256/f2/48/f24875ee4ab167da85df2d6341fb26d44b584f6c76bd82ec554ee9e9bc1754dd
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/476DD151B3B1EF2585256CC10083D470.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2-303

## ADs that name it (0)

None.

## Approved models (1)

- Lockheed Martin Aeronautics Company 18 ([TCDS A-723](https://openairdocs.org/tcds/A-723))

## 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.

Jepartment of tErattsptfrbittim - ^ffrberal ^niatton JVbmtnistratinn (Eertifttate SA2-303 Signature Flight Support Corporation, a Delaware Corporation 7511 Lernmon Avenue, Hangar C Dallas, TX 75209 723 Lockheed 18 Civil Air Installation of Sperry A-12 autopilot in accordance with Drawing List SD408000-3D dated 7/7/64, or later FAA approved revision.

1. STC SA2-185 rudder spring tab installation is required.

2. FAA Approved AFM Supplement dated 1/5/60 for 19,500 Ibs, aircraft is required.

3. FAA Approved AFM Supplement dated 12/20/63, revised 6/28/65 for 22,500 Ibs, aircraft is required.

4. This STC is part of the basic Howard 250 and H250 Tri-Gear aircraft and the Sperry A-12 Autopilot is covered in the flight manuals for these models.

5. Compatibility of this modification with other previously approved modifications must be determined by the installer. ,.„, . November 13, 1957 January 21, 1958 itff- ^ 6/15/92; 12/21/98; 8/31/00 June 30, 1982 Rev. 12 «>«• (Signature) S. Frances Cox Manager, Special Certification Office, Southwest Region

47.

INSTRUC 1'IONS 'I'ht transfer endorse men I lielow may be used [o notify the appropriate FAA Regional Office of [he transfer of (his Supplemental Type Ortif irate.

Tile FAA will reissue me rrrlificale in the name o! ihe transferee and forward il In him.

TRANSFER ENDORSEMENT Transfer the ownership of Supplemental Type Certificate Number to (Name of transferee) (Address tif transferee) (Number and street) , Slalf. and ZIP fvdt) from (Name of grantor) (Print or type) (Address of grantor) (Number and fl'fftf (City, Stall, anil %iP codi) Extent of Authority (if licensing agreement):

Signature of grantor (In ink):

**C FAA AC 63-5536**

## Every issue (1)

- August 31, 2000: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/f2/48/f24875ee4ab167da85df2d6341fb26d44b584f6c76bd82ec554ee9e9bc1754dd)

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