# STC SA1-653

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: BF Goodrich De-Icing Systems, United States
- Description: Electrothermal propeller deicing system.
- Applied: December 11, 1961
- Status date: March 1, 1996
- Product: Aircraft, Small Multi-Engine
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- Certificate PDF: https://openairdocs.org/files/sha256/e8/7f/e87fc7665b520a7cfea8e68e766173ee0805f26a9b507bc0a09a257fa9484906
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID116560542520230519171843.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-653

## ADs that name it (0)

None.

## Approved models (2)

- Twin Commander Aircraft Corporation 560F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 680-F ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

## What the certificate says

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

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate Number: SA1-653 This certificate issued to: BFGoodrich De-Icing Systems 1555 Corporate Woods Pkwy.

Uniontown, OH 44685 Part 3 of the CIVII Air Regulalions (See Type Certificate Data Sheet 2A4 for complete certification basis).

Original Product -Type Certificate Number: 2A4 Make: Twin Commander Model: 560F, 680-F Description of Type Design Change:

Install BFGoodrich Electrothermal Propeller De-Icing System in accordance with Installation Manuals (BFG Reports) 61-700, dated 9/12/61; and 59-728, dated 12/31/59.

Airplane Flight Manual Supplement No. 1 (BFG Report 61-748) dated 10/11/61, or later FAA Approved Revisions, is required on board for operation. 2. Compatibility of this design change with previously approved modifications must be determined by the installer.

Date of Application: December 11, 1961 Jule wissued: March 1, 1996 Date of Issuance: . December 26, 1961 Date Amended:

FEDERAL AVIATION OR chanes L. Smancy, Manager DHINISTRAYIOR Systems & Flight Test Branch Chicago Aircraft Certification Office (Title) 47 FAA FORM 8110-2 (10-68)

FEDERAL AVIATION AGENCY FORM APPROVED, BUDGET BUREAU NO. 04-R015 DEC 1 9 1961 INSTRUCTIONS - SUBMIT IN TRIPLICATE TO LOCAL FAA FLIGHT STANDARDS INSPECTOR.

Supplemental Type Certificate COPY WILL DE RETURNED TO APPLICANT UPON

**ISSUANCE**

1. NAME AND ADDRESS OF APPLICANT Supplemental Type Certificate APPLIED FOR:

The B.F.Goodrich Company 500 South Main Street Akron 18, Ohio

**AIRCRAFT ENGINE PROPELLER**

ORIGINAL MODEL DESIGNATION Aero Commander Models 560F and 680F NEW MODEL DESIGNATION (If desired)

3. DESCRIPTION OF CHANGE Installation of Electrothermal Propeller De-Icing System on the above models per:

"Installation Manual, B.F.Goodrich Electrothermal Prop De-Icing System for Aero Commander Models 560F and 680FI (Report No. 61-700) dated 9-12-61.

"Installation Manual, B.F.Goodrich Electrically Heated Propeller De-Icers" (Report No. 59-728) dated 12-31-59.

"BFGoodrich Supplement No. 1 to Aero Commander 560F and 680F Flight Manuals for Electrothermal Type Propeller De-Icing System" (Report No. 61-748) dated 10-11-61 required.

(over)

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

b. WILL PARTS BE MANUFACTURED FOR SALE (Ref. CAR 1.55)? YES NO

5. SIGNATURE AND TITLE OF APPLICANT J. R. Barrett

SIGNATURE December 11, 1961 Materials Engineer Date of Application: TITLE

6. To be Completed by FAA URE AND LOCATION OF DATA The data listed in Section 3 and below are located in FAA Eastern Region Engineering files:

a. B. F. Goodrich Bill of Material Dwg. #2E1161 atd. 11/1/61.

b. Rept. #61-752 "Bench Test Report, Brush-Slip Ring Assembly for B.F.Goodrich Company Electrically Heated Propeller De-Icing System" atd. 10/30/61.

c. Rept. #61-755 "Electrothermal Propeller Blade De-Icing System for Aero Commander Models 560F and 680F" atd. 11/17/61.

d. Conformity Inspection Form FAA-1257 atd. 11/14/61 on Aero Commander Model 680F.

e. B.F.Goodrich letter dtd. 11/21/61.

ORIGINAL TYPE CERTIFICATE NO. FAA APPROVAL 2A4 Supplemental Type Certificate NO.

SA1-653 DATE OF APPROVAL J. G. Saure, Chief Engineering and Manufacturing Branch 12/26/61 TITLE MENT PRINTING OFFICE: 1959 0-509657 FORM FAA- 2417(5-59)

## Every issue (1)

- March 1, 1996: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/e8/7f/e87fc7665b520a7cfea8e68e766173ee0805f26a9b507bc0a09a257fa9484906)

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