# STC SA999CE

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Electronic Research Co, United States
- Description: Installation of ERC battery monitor.
- Status date: March 1, 1974
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 2A3](https://openairdocs.org/tcds/2A3)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/A1AA2BFF418FFBF385256CC2005A72D3.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA999CE

## ADs that name it (0)

None.

## Approved models (1)

- Mooney Aircraft Corporation M20E ([TCDS 2A3](https://openairdocs.org/tcds/2A3))

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