# STC ST04684NY

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Kelowna Flightcraft Ltd, Canada
- Description: Modification of the Cabin Altitude Warning Reliability Improvement
- Applied: February 1, 2021
- Status date: December 3, 2021
- Product: Aircraft, Large Airplane
- Certification basis: Part 21, Part 25
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/4a/f3/4af32c302af108a5e89ce8617e5b28e2f75bae1d35895b9ae4da3ad38c56a964
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/F98921FBFDC4F65D862587D00071F854.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST04684NY

## ADs that name it (0)

None.

## Approved models (5)

- The Boeing Company 737-200 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-200C Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-300 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-400 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- The Boeing Company 737-500 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

## What the certificate says

The certificate has no text we could read; open the PDF to read it.

## Every issue (2)

- December 3, 2021: Reissued, Current. [certificate](https://openairdocs.org/files/sha256/4a/f3/4af32c302af108a5e89ce8617e5b28e2f75bae1d35895b9ae4da3ad38c56a964)
- December 3, 2021: Issued, Historical. [certificate](https://openairdocs.org/files/sha256/96/06/960643327d50c6250fb708c11a970ae2f0c290539c200aed23055ff5316bc27b)

---
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.