# STC ST223CH

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: AvAero, United States
- Description: Installation of a Stage 3 hushkit when powered by P&W JT8D-7, JT8D-9, JT8D-15, or JT8D-17 Series Engines.
- Applied: January 24, 1994
- Status date: December 1, 2009
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/4e/ea/4eea05f0c932e0487ec0b23d46d6010917ba1d95f0c9169420495016af37f09e
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/CC346FF689BB095E862576DC00753E59.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST223CH

## ADs that name it (1)

- [AD 98-14-09](https://openairdocs.org/ad/98-14-09): Forward Engine Mount Support · Boeing 737-100 Series, 737-200 Series and 737-200C Series. Effective Jul 17, 1998. Cited in the text

## Approved models (3)

- The Boeing Company 737-100 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))
- 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))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- December 1, 2009: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/4e/ea/4eea05f0c932e0487ec0b23d46d6010917ba1d95f0c9169420495016af37f09e)

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