# STC SH4970SW

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Marathon Power Tech Co, United States
- Description: Installation of Marathon TCA or TSP 1735 battery.
- Status date: May 19, 1994
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H9EU](https://openairdocs.org/tcds/H9EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/99BF486F89D9862185256CC2005C32B2.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SH4970SW

## ADs that name it (0)

None.

## Approved models (1)

- Eurocopter France AS-350 Series ([TCDS H9EU](https://openairdocs.org/tcds/H9EU))

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