# STC SA2-725

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Staggerwing Museum Foundation Inc., United States
- Description: Installation of oil cooler, G & O Mfg. Co. #E703, modified with Fullerton Syphon DV5 thermostat.
- Applied: July 18, 1959
- Status date: October 6, 2006
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-2-582](https://openairdocs.org/tcds/A-2-582), [TCDS A-765](https://openairdocs.org/tcds/A-765)
- Certificate PDF: https://openairdocs.org/files/sha256/2c/67/2c678e5cf2a944870f2e2cebcaaac7fa4253806d0afde899f6c7c8ce8046c184
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/58D373FBC1A6349D862574F1006BBA4F.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2-725

## ADs that name it (0)

None.

## Approved models (6)

- Hawker Beechcraft Corporation Army AT-11 ([TCDS A-2-582](https://openairdocs.org/tcds/A-2-582))
- Hawker Beechcraft Corporation C-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Hawker Beechcraft Corporation C-45H ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Hawker Beechcraft Corporation D18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Hawker Beechcraft Corporation E18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Hawker Beechcraft Corporation G18S ([TCDS A-765](https://openairdocs.org/tcds/A-765))

## 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.

This certificate issued to: Staggerwing Museum Foundation, Inc.

560 Old Shelbyville Hwy Tullahoma, TN 37388

Part * of the Civil Air Regulations. * CAR 03 effective 11/13/45 and 3.242 of CAR 3 effective 11/01/49 as amended by 3-14.

Original Product - Type Certificate Number : 765, 757 and 2-582 Make : Beech Model : D18S, E18S, C-45G/H, TC-45G/H, G18S and AT-11

Installation of oil cooler, G&O Mfg. Co. #E703, modified with Fullerton Syphon DV5 thermostat in accordance with Airline Training, Inc. Dwg. No. C13092C, revised 04/03/61, and ATI Installation Instructions dated 10/10/58, revised 04/04/61.

Airworthiness compatibility of this STC with all other major changes to the standard original model(s) shown above should be confirmed prior to installation 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.

Date reissued : December 9, 1966; August 15, 1968;

February 26, 1990; October 6, 2006 Date amended : July 6, 1960; May 8, 1961

Original signed by Robert D. Adamson

( Signature) Robert D. Adamson Program Manager Wichita Aircraft Certification Office (Title) Date of application : October 14, 1959 Date of issuance : July 28, 1959

## Every issue (1)

- October 6, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/2c/67/2c678e5cf2a944870f2e2cebcaaac7fa4253806d0afde899f6c7c8ce8046c184)

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