# STC SA1373CE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Knots 2U Ltd., United States
- Description: Install third window. (PA-28-180 S/N 28-1 THRU 28-4377, PA-28-235 S/N 28-10003 THRU 28-11039)
- Applied: April 21, 1977
- Status date: May 24, 2021
- Product: Aircraft, Small Airplane
- Certification basis: Part 3, Part 21
- Data sheets: [TCDS 2A13](https://openairdocs.org/tcds/2A13)
- Certificate PDF: https://openairdocs.org/files/sha256/ec/62/ec62d84f10b9384e6a7da21fb45d4ff2ebf6594dd414873be2477c9f4e6d90f9
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/BF24F0F03049C2CA862587030015D41F.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1373CE

## ADs that name it (0)

None.

## Approved models (5)

- The New Piper Aircraft Inc. PA-28-140 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-150 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-160 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-180 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))
- The New Piper Aircraft Inc. PA-28-235 ([TCDS 2A13](https://openairdocs.org/tcds/2A13))

## 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 FAA Form 8110-2 (5/14) Page 1 of 3

Knots2U, Ltd.

Number: SA1373CE 709 Airport Road Burlington, WI 53105

Part 3* of the Civil Air Regulations.

Original Product – Type Certificate Number: Make: Piper Model:

2A13 PA-28-140, PA-28-150, PA-28-160, PA-28-180, PA-28-235

Installation of a Third Window in accordance with:

1. Drawing List No. 28200, stamped "FAA Approved" and dated September 15, 1977, or later FAA Approved revision.

1. This approval should not be extended to other specific airplanes 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 that airplane. (Continued on page 3.)

Date of Application: April 21, 1977

Date Reissued: May 24, 2021

Date of Issuance: September 16, 1977 Date Amended: November 17, 1977

Signature

Title Charlene Combs Program Manager Wichita ACO Branch

United States of America Department of Transportation Federal Aviation Administration Supplemental Type Certificate FAA Form 8110-2 (5/14) Page 2 of 3

To (Name and address of transferee)

From (Name and address of grantor)

SA1373CE

FAA Form 8110-2 (5/14) Page 3 of 3

(Continuation Sheet) Number: SA1373CE

Reissue Date: May 24, 2021

Airworthiness requirements (*continued from page 1):

Effective May 15, 1956, plus the amendments listed on Type Certificate Data Sheet 2A13.

Limitations and Conditions (continued from page 1):

2. Parts manufactured under this STC may have been produced without an FAA approved quality control procedure. Prior to installation, such parts must be inspected for conformity and airworthiness in accordance with FAR's 21 and 43.

Model S/N Eligibility:

PA-28-180: 28-1 thru 28-4377 PA-28-235: 28-10003 thru 28-11039

## Every issue (1)

- May 24, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/ec/62/ec62d84f10b9384e6a7da21fb45d4ff2ebf6594dd414873be2477c9f4e6d90f9)

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