# STC SA3-728

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Reed Jackson M., United States
- Description: Lycoming O-360-AID engines with Hartzell HC-92ZK-2B/8447-12A or HC-C2YK-2R/7666-4 propellers and increase gross weight to 3,684 lbs.
- Status date: January 1, 1960
- 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/577772BCC2ACF3DA86256CD9006B43E3.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-728

## ADs that name it (0)

None.

## Approved models (1)

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

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