# STC SA4137NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Automatic Flagman Company, United States
- Description: Installation of a Model 6 Automatic Flagman dispensor system on the upper surface of the right wing root.
- Applied: September 10, 1986
- Status date: October 23, 2003
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9SW](https://openairdocs.org/tcds/A9SW)
- Certificate PDF: https://openairdocs.org/files/sha256/79/35/79353cada43b9e40a06af2bed80f451a7cad3fb3a8cb0be866bf91a6eb3b1e8e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9E3DFFDB1552554D86257A25005801BF.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4137NM

## ADs that name it (0)

None.

## Approved models (1)

- Air Tractor Inc. AT-301 ([TCDS A9SW](https://openairdocs.org/tcds/A9SW))

## 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.

United States of America Department of Transportation_Federal Aviation Administration Supplemental Type Certificate (This STC is a duplicate original to replace the original which was lost. Issued 10/22/03) Number SA4137NM This certificate, issued to Automatic Flagman Company 7251 W. 4 th Street Greeley, CO 80632

Part 21.25(a)(1) of the Federal Aviation Regulations.

Original ProductType Certificate Number: A9SW Make: Air Tractor Model : AT-301

Description of the Type Design Change : Installation of a Model 6 Automatic Flagman Dispensor System on the upper surface of the right wing root in accordance with Automatic Flagman Master Drawing List Number 100, dated November 10, 1987, and Installation Instructions No. No. 201-1000, revised January 22, 1988, or later FAA approved revisions. Installation of optional Automatic Flagman tail saver in accordance with Automatic Flagman Drawing Number 142, and Installation Instructions Number 143, each dated February 13, 1987, or later FAA approved revisions.

Limitations and Conditions : Approval of this change in type design applies to basic configurations of the Model AT-301 airplane only. This approval should not be extended to other aircraft of this model on which other previously approved modifications are incorporated unless it is determined that the interrelationship between this change and any other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. Airplanes equipped with this modification must be operated in accordance with FAA Flight Manual Supplement, dated January 22, 1988, or later FAA approved revision. A copy of this Certificate and Flight Manual Supplement shall be maintained as part of the permanent records for the modified aircraft.

If the holder agrees to permit another person to use this certificate to alter the product, the holder shall give the other person written evidence of that permission.

Date of application: September 10, 1986 Date reissued: October 23, 2003 Date of issuance: January 22, 1988 Date amended:

(Signature) Acting Manager, Seattle Aircraft Certification Office (Title)

## Every issue (1)

- October 23, 2003: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/79/35/79353cada43b9e40a06af2bed80f451a7cad3fb3a8cb0be866bf91a6eb3b1e8e)

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