# STC SA1558SW

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Williams Barbara or Bob, United States
- Description: Installation of vortex generators, wing leading edge cuffs, wing tips, fairings, de-icing boots and stall strips.
- Applied: June 6, 1972
- Status date: January 28, 1982
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6CE](https://openairdocs.org/tcds/A6CE)
- Certificate PDF: https://openairdocs.org/files/sha256/f2/1f/f21fb9ef62ac3f37a6a50c7946cee3e84729d96bd246e8da403dbfc88a1dbc9e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C166C86BF69F1ED485256CC100821348.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1558SW

## ADs that name it (0)

None.

## Approved models (13)

- Cessna Aircraft Company 337 ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337A ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337B ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337C ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337D ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337E ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337F ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company 337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company P337H ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company T337B ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company T337G ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))
- Cessna Aircraft Company T337H-SP ([TCDS A6CE](https://openairdocs.org/tcds/A6CE))

## 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 511558547 This certificate issued to: Barbara or Bob W1111ams Udall, Kansas 67146 Part 3 of the CIV11 AIT Regulaliens: effective May 15, 1956, for 337 and 337A and FAR 23 effective February 1, 265, for the romainder. See TODS A6CE for effective Amendments.

Original Product -Lype berlificate Number A6CE Make Cesana Mertel 337, 337A, 337฿, T3378, 337C, 337D, 337E, Description of Type Design Change: 337F, 337C, T337G, 337H, P337H, pad T337H Installation of vortex generators on fuselage; wing leading edge cuffs, wing tips;

fairings on vertical tail; and optional de-icing boots and leading edge stall strips in accordance with Mid-America STOL Drawing List No. 1300 with an FAA approval date of January 28, 1982. or later. This drawing list supersedes the previous listing of individual drawings called out on this STC.

timitations and funditi ne

1. This approval should not be extended to other specific airplanes of this model on which other previously approved modifications are incorporated, uniess it is determined that the interrelationship between this change and any of those other previously approved modifications will introduce no adverse effect upon the airworthiness of that airplane. 2. The following placard is required for the T3379 (S/N P3370226 and on), 337H, P3371, and T337H airplanes:

(See Continuation Sheat)

Date of Application: June 6, 1972 Jule reissed: March 21, 1973; May 14, 1973;

Date of Issuance: November 24, 1972 ended: Pebruary 14, 1975; June 8, 1981; Maïch 1, 1974; September 5, 1979 VIATIO By Direction of the Administrator January 28, 1982 Original Signed B Robert A. Gambril, Jr.

(Signature ) Robert A. Gambr111, Jr., Acting Chief Wichita Aircraft Certification Office

47.

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate (Continuation Sheet) Number: SA155854 THE PERFORMANCE OF THIS AIRPLANE EQUIPPED WITH SIC SA15585W

**IS EQUAL TO OR BETTER THAN THE PERFORMANCE AS LISTED IN THE**

ORIGINAL FAA APPROVED AIRPLANE FLIGHT MANUAL OR LIMITATIONS SECTION OF THE PILOT'S OPERATING HANDBOOK, AS APPROPRIATE.

**FAA FORM 8110-2-1 (10-69)**

**PAGE OF PAGES C FAA AC 73-2651**

## Every issue (1)

- January 28, 1982: Amended, Current. [certificate](https://openairdocs.org/files/sha256/f2/1f/f21fb9ef62ac3f37a6a50c7946cee3e84729d96bd246e8da403dbfc88a1dbc9e)

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.