# STC SA3581NM

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Innovative Scientific Development, Inc., United States
- Description: Installation of electric heater and auxiliary alternator. (PA-23-250 SN 27-7654001 & up)
- Status date: March 17, 1987
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A10](https://openairdocs.org/tcds/1A10)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6DF399688569FC7E85256CC2000A9976.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3581NM

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-23-250 ([TCDS 1A10](https://openairdocs.org/tcds/1A10))

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