# STC SA731EA

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Waco Aircraft Company, United States
- Description: Installation of Stewart-Warner tachometer P/N 551-WM and flexible drive shaft P/N 446642.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A9EU](https://openairdocs.org/tcds/A9EU)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/C149F81EAC22B0D3862570D200602DE5.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA731EA

## ADs that name it (0)

None.

## Approved models (1)

- Aermacchi S.p.A. S.205-22/R ([TCDS A9EU](https://openairdocs.org/tcds/A9EU))

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