# STC ST00223MC

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Duncan Aviation Inc., USA
- Description: Cockpit Cooling System Modification
- Applied: February 15, 2023
- Status date: August 28, 2023
- Product: Aircraft, Large Airplane
- Certification basis: Part 25
- Data sheets: [TCDS A10CE](https://openairdocs.org/tcds/A10CE)
- Certificate PDF: https://openairdocs.org/files/sha256/56/9d/569d7b39bd8976c186cf5510106873333928847f24164e67381f473c5f342042
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/DRSDOCID104440252220230918151111.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/ST00223MC

## ADs that name it (0)

None.

## Approved models (1)

- Learjet Inc. 35A (C-21A) ([TCDS A10CE](https://openairdocs.org/tcds/A10CE))

## What the certificate says

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

## Every issue (1)

- August 28, 2023: Issued, Current. [certificate](https://openairdocs.org/files/sha256/56/9d/569d7b39bd8976c186cf5510106873333928847f24164e67381f473c5f342042)

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