# STC SA4021SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aerex Group, Inc, United States
- Description: BKM 100 PHM 700 pitot heat monitor system.
- Status date: August 29, 1995
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A3EU](https://openairdocs.org/tcds/A3EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D90A2D54DE0F4EF585256CC2000C6036.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA4021SW

## ADs that name it (0)

None.

## Approved models (3)

- Raytheon Aircraft Company BH.125 Series 600A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Raytheon Aircraft Company HS.125 Series 600A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Raytheon Aircraft Company HS.125 Series 700A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

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