# STC SA4-673

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Lott William C, United States
- Description: Eonite covering on rudder, wings and ailerons.
- Status date: January 1, 1970
- Product: Aircraft, Small Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 641](https://openairdocs.org/tcds/641), [TCDS 713](https://openairdocs.org/tcds/713), [TCDS A-649](https://openairdocs.org/tcds/A-649)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/79F28CB900F6CFCE86256D7300659D5B.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-673

## ADs that name it (0)

None.

## Approved models (3)

- Raytheon Aircraft Company 17 Series ([TCDS 641](https://openairdocs.org/tcds/641))
- Raytheon Aircraft Company 17 Series ([TCDS A-649](https://openairdocs.org/tcds/A-649))
- Raytheon Aircraft Company D17A (Army UC-43F) ([TCDS 713](https://openairdocs.org/tcds/713))

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