# STC ST00037AT

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Unison Industries, United States
- Description: Unison igniter plugs, P/N 9044400-1.
- Status date: May 2, 1994
- Product: Engine
- Certification basis: Part 21
- Data sheets: [TCDS E10CE](https://openairdocs.org/tcds/E10CE), [TCDS E1GL](https://openairdocs.org/tcds/E1GL), [TCDS E4CE](https://openairdocs.org/tcds/E4CE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2599A5FEE975901D85256CC2006A6F7B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/ST00037AT

## ADs that name it (0)

None.

## Approved models (44)

- Allison Engine Company Inc. 225-C10 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 225-C10A ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-B15A ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B15E ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B15G ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17 ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17B ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17C ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17D ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17E ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17F ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17F/1 ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-B17F/2 ([TCDS E10CE](https://openairdocs.org/tcds/E10CE))
- Allison Engine Company Inc. 250-C10 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C10B ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C10D ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C18 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C18A ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C18B ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C18C ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C19 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20B ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20C ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20F ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20J ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20R ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20R/1 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20R/2 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20R/4 ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20S ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C20W ([TCDS E4CE](https://openairdocs.org/tcds/E4CE))
- Allison Engine Company Inc. 250-C28 ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C28B ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C28C ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30 ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30G ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30G/2 ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30L ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30M ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30P ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30R ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30S ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))
- Allison Engine Company Inc. 250-C30U ([TCDS E1GL](https://openairdocs.org/tcds/E1GL))

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