# STC SA3685NM

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Knots 2U Ltd., United States
- Description: Installation of fiberglass wing tips; each tip having a 100 watt recognition light and a clear plastic lens.
- Applied: March 1, 1986
- Status date: October 9, 2015
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 3A21](https://openairdocs.org/tcds/3A21)
- Certificate PDF: https://openairdocs.org/files/sha256/6b/1b/6b1b2da140c24085f3989568daf726f634b4a67d584a880a6e27663eb3052658
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B49AEC524A77E36486257EDD0058001E.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3685NM

## ADs that name it (0)

None.

## Approved models (28)

- Textron Aviation Inc. 210 ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210-5 (205) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210-5A (205A) ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210A ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210B ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210C ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210D ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210E ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. 210R ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. P210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. P210R ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210F ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210G ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210H ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210J ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210K ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210L ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210M ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210N ([TCDS 3A21](https://openairdocs.org/tcds/3A21))
- Textron Aviation Inc. T210R ([TCDS 3A21](https://openairdocs.org/tcds/3A21))

## 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 SA3685NM

This certificate, issued to KNOTS 2U, LTD 709 Airport Road Burlington, WI 53105

Part 3 of the Civil Air Regulations.

effective May 15, 1956 Original ProductType Certificate Number: 3A21 Make: Cessna Model: 210 Series

Description of the Type Design Change: Installation of fiberglass wing tips; each trip having a 100 watt recognition light and a clear plastic lens in accordance with R.M.D Aircraft Lighting, Inc. Drawing List RMD-00210-C. This approval is limited to those specific models of the Cessna 210 Series which are approved for production Cessna Series 1221111 wing tips.

Limitations and Conditions: Approval of this change in type design applies to the above model aircraft 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 relationship between this change and any of those other previously approved modifications, including changes in type design, will introduce no adverse effect upon the airworthiness of that aircraft. A copy of this Certificate must be maintained as part of the permanent records for the modified aircraft.

Date of application: March 1, 1986 Date reissued: October 9, 2015 Date of issuance: February 23, 1987 Date amended:

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- October 9, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/6b/1b/6b1b2da140c24085f3989568daf726f634b4a67d584a880a6e27663eb3052658)
- March 1, 1986: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/af/4d/af4dba825bc791370f06c33da181c322c83724b274c7054beca8d71d5566ca56)

---
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.