# STC SA857EA

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Atlantic Aviation Corporation, United States
- Description: Installation of Microturbo, Inc. auxiliary power unit Model 024, type 'Saphir 4.'
- Status date: April 2, 1971
- 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/58E060F95B96F70085256CC20058E83D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA857EA

## ADs that name it (0)

None.

## Approved models (3)

- Raytheon Aircraft Company BH.125 Series 400A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Raytheon Aircraft Company DH.125 Series 3A/RA ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))
- Raytheon Aircraft Company DH.125 Series 400A ([TCDS A3EU](https://openairdocs.org/tcds/A3EU))

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