# STC SA574NW - Type: Supplemental type certificate - Status: Current, Reissued - Holder: Knots 2U Ltd., United States - Description: Installation of forward facing white lights, (100 Watts) and clear plastic wing tip tank nose cone and associated systems - Applied: February 25, 1978 - Status date: October 9, 2015 - Product: Aircraft, Small Airplane - Certification basis: Part 3, Part 21 - Data sheets: [TCDS 3A10](https://openairdocs.org/tcds/3A10), [TCDS 3A25](https://openairdocs.org/tcds/3A25), [TCDS A7CE](https://openairdocs.org/tcds/A7CE) - Certificate PDF: https://openairdocs.org/files/sha256/ea/0a/ea0afb99e4a6563be66b64517b76cb1035aef33165e990f8ca8ef5f1bf80020d - Approved model list and other attachments: [SA574NW_AML.pdf](https://openairdocs.org/files/sha256/cd/c9/cdc96cf85b9d98670df2cc97eb093129378f4168b895f770f64316e381ba791e) - FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/9FD5FF884FAB3C9086257EDD0052A2A0.0001 - DRS record last changed: December 5, 2025 - Page: https://openairdocs.org/stc/SA574NW ## ADs that name it (0) None. ## Approved models (28) - Textron Aviation Inc. 310G ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310H ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310I ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310J ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310K ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310L ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310N ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310P ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310Q ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 310R ([TCDS 3A10](https://openairdocs.org/tcds/3A10)) - Textron Aviation Inc. 320A ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 320B ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 320C ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 320D ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 320E ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 320F ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 340A ([TCDS 3A25](https://openairdocs.org/tcds/3A25)) - Textron Aviation Inc. 401 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 401A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 401B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 402 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 402A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 402B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 411A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 414 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 421 ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 421A ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) - Textron Aviation Inc. 421B ([TCDS A7CE](https://openairdocs.org/tcds/A7CE)) ## 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. Number SA574NW This certificate, issued to KNOTS 2U, LTD 709 Airport Road Burlington, WI 53105 Part 3 of the Civil Air Regulations. Original ProductType Certificate Number: See attached Master Eligibility List (MEL) Make: No. SA574NW for list of approved airplane Model: models and applicable airworthiness regulations. Description of the Type Design Change: Installation of forward facing white lights (100 watts), clear plastic wing tip nose cone and associated systems in accordance with R. M. DeBorde Installation Instructions, Kit No. R.M.D. 00124-A. Limitations and Conditions: Approval of this change in type design applies basically to the aircraft models listed on Federal Aviation Administration (FAA) Approved MEL No. SA574NW and should not be extended to other specific models of these airplanes on which other previously approved modifications are incorporated unless it is determined that the interrelationship will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate and R. M. DeBorde Installation Instructions, Kit No. R.M.D 00124-A must be maintained as part of the permanent records for the modified aircraft. Date of application: February 25, 1978 Date reissued: August 26, 1991; October 9, 2015 Date of issuance: March 14, 1978 Date amended: April 25, 1978; August 4, 1978 (Signature) Manager, Seattle Aircraft Certification Office (Title) ### SA574NW_AML.pdf **FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA574NW FOR** FORWARD FACING LIGHTS AND WING TIP TANK NOSE CONE ISSUE DATE: August 4, 1978 Page 1 of 2 **ITEM AIRPLANE MAKE** **AIRPLANE MODEL ORIGINAL TYPE CERT NUMBER** **CERTIFICATION** **BASIS FOR** **ALTERATION** **FAA SEALED DRAWING /** DRAWING LIST AFM Supplement & Date AML REV DATE Number Revision* NUMBER Revision* 1. Cessna 310G, 310H, 310I, 310J, 310K, 310L, 310N, 310P 3A10 CAR 3, dated 11/1/1949, as amended by 3-1 thru 3-10 and dated 5/15/1956 as amended by 3-2 and 3-5 2003-C 2002-C 2001-C (6 Sheets) 2. Cessna 310Q, 310R 3A10 CAR 3 dated 11/1/1949, as amended by 3-1 thru 3-10 and dated 5/15/1956 as amended by 3-2 and 3-5 2003-C 2002-C 2001-C (6 Sheets) 3. Cessna 320A, 320B, 320C, 320D, 320E, 320F 3A25 CAR 3, effective 5/15/1956, as amended by 3-1 thru 3-5 2003-C 2002-C 2001-C (6 Sheets) 4. Cessna 340A 3A25 CAR 3, effective 5/15/1956, as amended by 3-1 thru 3-5 and 3-8 except Subpart B 2003-C 2002-C 2001-C (6 Sheets) 5. Cessna 401, 401A, 401B, 402, 402A, 402B, 411A, 414 (except 1978) 421, 421A A7CE CAR 3, dated 5/15/1956 as amended by 3-1 thru 3-5 and 3-8 2003-C 2002-C 2001-C (6 Sheets) **FEDERAL AVIATION ADMINISTRATION (FAA) APPROVED MODEL LIST (AML) SA574NW FOR** FORWARD FACING LIGHTS AND WING TIP TANK NOSE CONE ISSUE DATE: August 4, 1978 Page 2 of 2 **ITEM AIRPLANE MAKE** **AIRPLANE MODEL ORIGINAL TYPE CERT NUMBER** **CERTIFICATION** **BASIS FOR** **ALTERATION** **FAA SEALED DRAWING /** DRAWING LIST AFM Supplement & Date AML REV DATE Number Revision* NUMBER Revision* 6. Cessna 421B A7CE CAR 3, dated 5/15/1956, as amended by 3-1 thru 3-5 and 3-8 2003-C 2002-C 2001-C (6 Sheets) * Or later FAA Approved Revision FAA Approved: Manager, Seattle Aircraft Certification Office AMENDED: August 26, 1991 REISSUED: October 9, 2015 ## Every issue (2) - October 9, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ea/0a/ea0afb99e4a6563be66b64517b76cb1035aef33165e990f8ca8ef5f1bf80020d), [SA574NW_AML.pdf](https://openairdocs.org/files/sha256/cd/c9/cdc96cf85b9d98670df2cc97eb093129378f4168b895f770f64316e381ba791e) - August 26, 1991: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/ad/94/ad940a2eaa68a96515218c2ea55e15e28eee75be7be602a4c236477987123295), [AML_SA574NW.pdf](https://openairdocs.org/files/sha256/ab/ed/abedb099fe11faf80f0f1055d75bd0f6f2c94109d704e8b753a0a4b2a82cb4e0) --- 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.