# STC SA4-604

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Kidwell Aviation Company, United States
- Description: Hydraulic landing gear retracting system.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-773](https://openairdocs.org/tcds/A-773)
- Certificate PDF: https://openairdocs.org/files/sha256/06/9c/069cd5494191a7948b56af2d87bd64d8d0f9e3c8b2913ed7bc5f1fa18dfd0697
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9723EEBC4C327F42862570D000789EE7.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-604

## ADs that name it (0)

None.

## Approved models (1)

- Bellanca Aircraft Corporation 14-13 Series ([TCDS A-773](https://openairdocs.org/tcds/A-773))

## What the certificate says

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

DICAL -NEV- 72 - 235 ~ RM ACA-2417 U.S. DEPARTMENT OF COMMERCE Supplemental Type Certificate

1. NAME AND ADDRESS OF APPLICANT Form Approved, Budget Bureau No. 41-R1823 1-8-6 INSTRUCTIONS - Submit in triplicate to local CAA Flight Operations and Airworthiness Inspector. Copy will be returned to applicant upon issuance.

Supplemental Type Certificate APPLIED FOR:

AIRCRAFT ENGINE PROPELLER Kidwell Aviation Company Torrance Municipal Airport Torrance, California NEW MODEL DESIGNATION (If desired) Same

3. DESCRIPTION OF CHANGE Installation ofhydraulic landing gear retracting system in accordance with Kidwell Aviation Company Installation Instructions No. ECK-Il and Dwg. No. ECK #4.

LIMITATION OF APPLICABILITY. This approval should not be extended to other specific airplanes of these models on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any of those other previously approved modificationswill introduce no adverse effect upon the airworthiness of that airplane.

ILL DATA BE AVAILABLE FOR SALE OR RELEASE TO OTHER PERSONS? YES NO VILL PARTS BE MANUFACTURED FOR SALE (Ref. CAR 1.55)? YES NO

0. SIGNATURE AND TITLE OF APPLICANT Charles 7 roman September 15, 1958 GNATURE Date of Application: TITLE

**6. TO BE COMPLETED BY CAA**

NATURE AND LOCATION OF DATA Lidwell Aviation Company Installation Instructions No. ECK-Il dated September 15, 1958.

Kidwell Aviation Company Dugs. Nos. ECK #l through EGK #6 inclusive.

Data are on file in the Aircraft Engineering Division, FAA, Region IV, Los Angeles, California.

Certification Basis: CAR ha ORIGINAL TYPE CERTIFICATE NO. 773 CAA APPROVAL ORIGINAL SIGNED W1 W. A. KLIKOFF Supplemental Type Certificate NO.

SALI-60L W. A. Klikoff SIGNATURE

OF APPROVAL Chief, Aireraft Engineering Division September 17, 1958 TITLE USCOMM-DC 32772 FORM ACA-2417 (7-56)

## Every issue (1)

- September 17, 1958: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/06/9c/069cd5494191a7948b56af2d87bd64d8d0f9e3c8b2913ed7bc5f1fa18dfd0697)

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