# STC SA1059SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Teledyne Battery Products, United States
- Description: Replace existing nickel-cadmium batteries with Teledyne Gill BB638/T series lead-acid batteries.
- Status date: April 29, 1996
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A4](https://openairdocs.org/tcds/2A4)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/65D4BE401BD0352D85256CC10080DD1D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1059SO

## ADs that name it (0)

None.

## Approved models (2)

- Twin Commander Aircraft Corporation 690 ([TCDS 2A4](https://openairdocs.org/tcds/2A4))
- Twin Commander Aircraft Corporation 690A ([TCDS 2A4](https://openairdocs.org/tcds/2A4))

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