# STC SA4-144

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Conair Aviation Ltd, Canada
- Description: Installation of Pratt & Whitney R-985 engine and conversion of airplane to duster.
- Status date: March 11, 1970
- 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/CF475EB18148C61385256CC2000C5D78.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-144

## ADs that name it (0)

None.

## Approved models (1)

- Boeing Airplane Company Wichita Division A75N1 Series ([TCDS A-743](https://openairdocs.org/tcds/A-743))

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