# STC SA00490LA - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Aero Spraying Service Inc., United States - Description: Installation of winglets. - Applied: December 17, 1996 - Status date: October 3, 2014 - Product: Aircraft, Single-Engine - Certification basis: Part 21, Part 23 - Data sheets: [TCDS A17SW](https://openairdocs.org/tcds/A17SW) - Certificate PDF: https://openairdocs.org/files/sha256/51/9e/519e767c150e3e5acb02a2e2613754632a918f83d8a363ed3d6e6d8b43c516d6 - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0ED5E311ED600B9D86257D6C005B97C3.0001 - DRS record last changed: December 6, 2025 - Page: https://openairdocs.org/stc/SA00490LA ## ADs that name it (8) - [AD 2006-08-08 R1](https://openairdocs.org/ad/2006-08-08-R1): Wing lower spar cap · Winglets (Aero Spraying Service STC SA00490LA). Effective May 5, 2009. Named in the applicability - [AD 2006-24-10](https://openairdocs.org/ad/2006-24-10): Wing spar lower cap · Winglets (Aero Spraying Service STC SA00490LA). Effective Jan 8, 2007. Named in the applicability - [AD 2002-11-05 R1](https://openairdocs.org/ad/2002-11-05-R1) (historical): Wing lower spar cap · Air Tractor AT-501. Effective Apr 21, 2006. Cited in the text - [AD 2006-08-08](https://openairdocs.org/ad/2006-08-08) (historical): Wing lower spar cap · Air Tractor AT-400, AT-401, AT-401B and 3 more. Effective Apr 21, 2006. Cited in the text - [AD 2006-08-09](https://openairdocs.org/ad/2006-08-09) (historical): Main spar lower caps · Air Tractor AT-802 and AT-802A. Effective Apr 21, 2006. Cited in the text - [AD 2002-26-05](https://openairdocs.org/ad/2002-26-05) (historical): Wing Lower Spar Cap · Winglets (Aero Spraying Service STC SA00490LA). Effective Jan 15, 2003. Named in the applicability - [AD 2002-11-05](https://openairdocs.org/ad/2002-11-05) (historical): Wing Lower Spar Cap · Winglets (Aero Spraying Service STC SA00490LA). Effective Jul 12, 2002. Named in the applicability - [AD 2002-11-03](https://openairdocs.org/ad/2002-11-03) (historical): Wing Lower Spar Cap · Winglets (Aero Spraying Service STC SA00490LA). Effective Jun 14, 2002. Named in the applicability ## Approved models (10) - Air Tractor Inc. AT-401 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-401A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-401B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-402B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-501 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502 ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502A ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) - Air Tractor Inc. AT-502B ([TCDS A17SW](https://openairdocs.org/tcds/A17SW)) ## 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. This Certificate issued to Aero Spraying Service Inc. 48901 Hwy. 93 #196 Polson, Montana 59860 Part 23* of the Federal Aviation Regulations. *Certification basis is set forth in Type Certificate Data Sheet A17SW. A17SW (Restricted Category) Air Tractor, Inc. AT-401, AT-401A, AT-401B, AT-402, AT-402A, AT-402B, AT-501, AT-502, AT-502A, AT-502B Description of Type Design Change: Installation of winglets in accordance with FAA Approved AG-TIPS Master Drawing List (MDL) No. 657-00, Revision E, dated July 1, 1997, or Marburger Enterprises, Inc. Master Drawing List (MDL) No. 657 -00, Revision 1, dated May 20, 1998, or later FAA approved revisions. Limitations and Conditions: Approval of this change in type design applies to the above aircraft model(s) only. This approval should not be extended to aircraft of this model 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 modifications will introduce no adverse effect upon the airworthiness of the aircraft. A copy of this Certificate must 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. (See Continuation Sheet page 3.) Date of application: December 17, 1996 Date of issuance : November 13, 1997 Date reissued: March 27, 2009; October 3, 2014 Date amended: June 16, 1998 (Signature) Manager, Airframe Branch Los Angeles Aircraft Certification Office (Title) Number SA00490LA Limitations and Conditions: (Continued): 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. 1. AG-TIPS FAA Approved Airplane Flight Manual Supplement Report Number 657.11 dated November 10, 1997, or Revision A, to Marburger Enterprises, Inc. FAA Approved Airplane Flight Manual Supplement, Report Number 657.11, dated June 15, 1998, or later FAA approved revision, is required as part of this installation. 2. Instructions for Continued Airworthiness must be available to maintenance personnel. 3. This airplane configuration is approved for restricted category operations, FAR 21.25(b)(1), agricultural, when configured in accordance with FAA approved AG-TIPS Master Drawing List (MDL) 657-00, Revision E, dated July 1, 1997 or Marburger Enterprises, Inc. Master Drawing List (MDL) 657-00, Revision 1, dated May 20, 1998, or later FAA approved revisions. 4. The applicable aircraft serial numbers for modification by this STC are as follows: AT-401 S/N 401-0662 and subsequent AT-401A S/N 401-0662 and subsequent AT-401B S/N 401B-0952 and subsequent AT-402 S/N 402-0694 and subsequent AT-402A S/N 402A-0738 and subsequent AT-402B S/N 402B-0966 and subsequent AT-501 S/N 501-0002 and subsequent AT-502 S/N 502-0003 and subsequent AT-502A S/N 502A-0158 and subsequent AT-502B S/N 502B-0187 and subsequent 5. Vortex generators installed with Micro Aerodynamics, Inc. Supplemental Type Certificate SA00403SE may be installed concurrently with this STC. Number SA00490LA Limitations and Conditions: (Continued): Other more limiting speed restrictions with dispersal equipment installed continue to apply as listed in the Air Tractor, Inc. Owner’s Manual or other approved Flight Manual Supplements. - END - ## Every issue (3) - October 3, 2014: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/51/9e/519e767c150e3e5acb02a2e2613754632a918f83d8a363ed3d6e6d8b43c516d6) - October 18, 2006: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/ce/ee/ceeeb9c3db415defb7f2dfbc7ddc686e3940abb9efe720ddefbfe00b42ac2d93) - June 16, 1998: Amended, Historical. [certificate](https://openairdocs.org/files/sha256/5b/f9/5bf92cb61589b6de6110cf4ecc0b73396f99d3d88ed92590d7f4342d96b42890) --- 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.