# STC SA1-427

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Staggerwing Museum Foundation Inc., United States
- Description: Pratt & Whitney R-985 engine installation with Simmonds Aero- cessories 580047 fuel injector per STC SE1-391, and takeoff weight increase to 9,800 lbs. and landing weight to 9,400 lbs. per STC SA2-820.
- Applied: October 27, 1959
- Status date: October 6, 2006
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-765](https://openairdocs.org/tcds/A-765)
- Certificate PDF: https://openairdocs.org/files/sha256/b2/7f/b27fc01197a53bf0b2f8ed05044a41e904564cf08b75ffa80822c34ef2013a1f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FA1C9982E3ADBB40862574F1006357F7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-427

## ADs that name it (0)

None.

## Approved models (5)

- 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 TC-45G ([TCDS A-765](https://openairdocs.org/tcds/A-765))
- Hawker Beechcraft Corporation TC-45H ([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 Make : Beech Model : D18S, C-45G/H, and TC-45G/H

Installation of P&W R985 Engine when modified with STC SE1-391, Simmonds Aerocessories, Inc. Model 580047 Fuel Injector, and incorporating STC SA2-820 increase in takeoff weight to 9800 lbs and increase in landing weight to 9400 lbs.

(1) The following placard on the instrument panel is requi red with this installation: “BURN OFF MAIN FUEL TO MINIMUM OF 6/10 BEFORE SWITCHING TANKS AT ANY TIME”.

(2) Airline Training Inc. Flight Manual Supplement for Beech Models D18S, C-45G/H, and TC-45G dated December 23, 1959 required with this installation.

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

(4) If the holder agrees to permit another person to use th is certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date reissued : May 22, 1967; August 15, 1968;

February 26, 1990; October 6, 2006 Date amended :

Original signed by Robert D. Adamson

( Signature) Robert D. Adamson Program Manager Wichita Aircraft Certification Office (Title) Date of application : October 27, 1959 Date of issuance : December 23, 1959

## Every issue (1)

- October 6, 2006: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/b2/7f/b27fc01197a53bf0b2f8ed05044a41e904564cf08b75ffa80822c34ef2013a1f)

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