# STC SA1728SO

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Teledyne Battery Products, United States
- Description: Replace existing nickel-cadmium batteries with Teledyne Battery Products G-6381E and G-6381ES.
- Applied: December 12, 1984
- Status date: May 4, 2001
- Product: Aircraft, Small Airplane
- Certification basis: Part 21
- Data sheets: [TCDS A8EA](https://openairdocs.org/tcds/A8EA), [TCDS A23SO](https://openairdocs.org/tcds/A23SO)
- Certificate PDF: https://openairdocs.org/files/sha256/1d/ce/1dcef2791afb94d5b245a8d54865032bcd813f27c6ae9c6a22838a237fb3c70f
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/FDE532A50317D37A85256CC10083CF7C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1728SO

## ADs that name it (0)

None.

## Approved models (5)

- Piper Aircraft Inc. PA-31T ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T1 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-31T2 ([TCDS A8EA](https://openairdocs.org/tcds/A8EA))
- Piper Aircraft Inc. PA-42 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))
- Piper Aircraft Inc. PA-42-720 ([TCDS A23SO](https://openairdocs.org/tcds/A23SO))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- May 4, 2001: Amended, Current. [certificate](https://openairdocs.org/files/sha256/1d/ce/1dcef2791afb94d5b245a8d54865032bcd813f27c6ae9c6a22838a237fb3c70f)

---
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.