# STC SA4-919

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Leo F Smith & Co Inc, United States
- Description: Modified wing.
- Status date: September 25, 1973
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-743](https://openairdocs.org/tcds/A-743)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D13DFE76C6765A9985256CC2000C5FD0.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-919

## ADs that name it (0)

None.

## Approved models (5)

- Boeing Airplane Company Wichita Division 75 (Army PT-13) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- Boeing Airplane Company Wichita Division A75 Series ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- Boeing Airplane Company Wichita Division A75N1 Series ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- Boeing Airplane Company Wichita Division B75 (Navy N2S-5) ([TCDS A-743](https://openairdocs.org/tcds/A-743))
- Boeing Airplane Company Wichita Division B75N1 (Navy N2S-3) ([TCDS A-743](https://openairdocs.org/tcds/A-743))

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