# STC SA1213SO

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Teledyne Battery Products, United States
- Description: Replace existing nickel-cadmium batteries with Gill BB638/T series lead-acid batteries.
- Status date: April 29, 1996
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A2SW](https://openairdocs.org/tcds/A2SW)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/530FDF9ADE1BED2B85256CC10080E019.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1213SO

## ADs that name it (0)

None.

## Approved models (3)

- Israel Aircraft Industries Ltd. 1121 ([TCDS A2SW](https://openairdocs.org/tcds/A2SW))
- Israel Aircraft Industries Ltd. 1121A ([TCDS A2SW](https://openairdocs.org/tcds/A2SW))
- Israel Aircraft Industries Ltd. 1121B ([TCDS A2SW](https://openairdocs.org/tcds/A2SW))

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain.