# STC SA451SW

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Howard Research & Development Co., United States
- Description: Installation of exhaust system
- Applied: November 27, 1964
- Status date: December 1, 1964
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13), [TCDS A1SW](https://openairdocs.org/tcds/A1SW)
- Certificate PDF: https://openairdocs.org/files/sha256/13/5e/135e6b9521dde4b8683ca16fb405948ed00187caaef62b6b758f5596a1629e42
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/37EE9413EA39E2CA86257E0C006BD62E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA451SW

## ADs that name it (0)

None.

## Approved models (2)

- Air Trading Corporation Navy PV-1 ([TCDS LTC AL-13](https://openairdocs.org/tcds/LTC%20AL-13))
- The Dee Howard Company 500 ([TCDS A1SW](https://openairdocs.org/tcds/A1SW))

## What the certificate says

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

FEDERAL AVIATION AGENCY Supplemental Type Certificate

1. NAME AND ADDRESS OF APPLICANT Howard Research & Development Co.

306 Krameria Driva San Antonio, Texas 78213

**3. DESCRIPTION OF CHANGE FORM APPROVED, BUDGET BUREAU NO. 04-R015**

**INSTRUCTIONS - SUBMIT IN TRI PLICATE TO LOCAL FAA FLIGHT STANDARDS INSPECTOR.**

**COPY WILL BE RETURNED TO APPLICANT UPON**

**ISSUANCE**

2. Supplemental Type Certificate APPLIED FOR:

**AIRCRAFT ENGINE PROPELLER**

ORIGINAL MODEL DESIGNATION Hoverd 500, PY-1 & Super Vantura NEW MODEL DESIGNATION (If desired) None Installation of axbaust systen in accordance vith Howard Research & Development Co. dravings 02-1164D23-13 Reviaion A dated 12-2-64, and 02-1164D24-14 Reviaion A dated 12-2-64.

WILL DATA BE AVAILABLE FOR SALE OR RELEASE TO OTHER PERSONS? YES X NO

b. WILL PARTS BE MANUFACTURED FOR SALE (ROf. CAR 1.55)? — NO

**5. SIGNATURE AND TITLE OF APPLICANT**

SIGNATURE November 27, 1964 Date of Application: TITLE

6. To be Completed by FAA

NATURE AND LOCATION OF DATA Data listed on FAA-1257 datad 12-4-64 on file at SW-210.

Reference Project I643SWS Applicable regulations same as original certification.

ORIGINAL TYPE CERTIFICATE NO. FAA APPROVAL LTC 13, ALSH C7 Biesemeier Supplemental Type Certificate NO.

SIGNATURE SA4518W DATE OF APPROVAL H. H Slaughter 12-1-64 Chief, Engineering and Manufacturing Brench * U.S. GOVERNMENT PRINTING OFFICE: 1959 0-509657 FORM FAA -2417 (5-59)

## Every issue (1)

- December 1, 1964: Issued, Current. [certificate](https://openairdocs.org/files/sha256/13/5e/135e6b9521dde4b8683ca16fb405948ed00187caaef62b6b758f5596a1629e42)

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