# STC SA255NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: K S Avionics Inc, United States
- Description: Installation of KS Avionics EGT/CHT-2( ) combined exhaust gas and cylinder head temperature monitoring system.
- Status date: April 29, 1985
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-815](https://openairdocs.org/tcds/A-815), [TCDS A-806](https://openairdocs.org/tcds/A-806)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6C08FACAD6FFBFC85256CC200015FCD.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA255NM

## ADs that name it (0)

None.

## Approved models (4)

- Bombardier-Rotax GmbH Otter DHC-3 (U-1A) ([TCDS A-815](https://openairdocs.org/tcds/A-815))
- de Havilland Inc. (Canada) DHC-2 (L-20A) MK.I ([TCDS A-806](https://openairdocs.org/tcds/A-806))
- de Havilland Inc. (Canada) DHC-2 (L-20A) MK.II ([TCDS A-806](https://openairdocs.org/tcds/A-806))
- de Havilland Inc. (Canada) DHC-2 (L-20A) MK.III ([TCDS A-806](https://openairdocs.org/tcds/A-806))

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