# STC SA411NW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Knots 2U Ltd., United States
- Description: Installation of forward facing white lights, position lights, clear plastic covers, and associated systems.
- Applied: November 24, 1976
- Status date: October 9, 2015
- Product: Aircraft, Large Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A2SW](https://openairdocs.org/tcds/A2SW)
- Certificate PDF: https://openairdocs.org/files/sha256/dc/87/dc87f4460672a3c4423d59d0bd32195329d3cf8cd371e955c9fc7dc72f2746ac
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/B5484AEDF6A2EBE786257EDD005982C3.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA411NW

## ADs that name it (0)

None.

## Approved models (2)

- Israel Aircraft Industries Ltd. 1121A ([TCDS A2SW](https://openairdocs.org/tcds/A2SW))
- Israel Aircraft Industries Ltd. 1121B ([TCDS A2SW](https://openairdocs.org/tcds/A2SW))

## 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 SA411NW

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

Part 4b of the Civil Air Regulation,. Effective December 31, 1953 Original ProductType Certificate Number: A2SW Make: Aero Commander Model: 1121 A and B

Description of the Type Design Change: Installation of forward facing white lights, position lights, clear plastic covers, and associated systems in accordance with R. M. DeBorde Installation Instructions, Kit No. R.M.D.

00123-A.

Limitations and Conditions: Approval of this change in type design applies basically 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 interrelationship between this change and any of those previously approved modifications 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: November 24, 1976 Date reissued: August 26, 1991; October 9, 2015 Date of issuance: February 25, 1977 Date amended: July 15, 1977

(Signature)

Manager, Seattle Aircraft Certification Office (Title)

## Every issue (2)

- October 9, 2015: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/dc/87/dc87f4460672a3c4423d59d0bd32195329d3cf8cd371e955c9fc7dc72f2746ac)
- August 26, 1991: Reissued, Historical. [certificate](https://openairdocs.org/files/sha256/b5/c7/b5c754c61397cdef6588ea267a4049f5a171bf8a547e7d01624bc706c0694b54)

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