# STC SH1640SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Aviall, United States
- Description: Installation of Utah Research & Develop. Co. Model 126 BC-101 airborne battery charger system.
- Status date: October 31, 2002
- Product: Aircraft, Rotorcraft
- Certification basis: Part 21
- Data sheets: [TCDS H4SW](https://openairdocs.org/tcds/H4SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/0E52A757DDF507AD85256CC2005C2ED2.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SH1640SO

## ADs that name it (0)

None.

## Approved models (2)

- Bell Helicopter Textron 212 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))
- Bell Helicopter Textron 412 ([TCDS H4SW](https://openairdocs.org/tcds/H4SW))

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