# STC SA4-1633

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Serv-Aero Engineering Inc, United States
- Description: Hopper.
- Status date: January 1, 1960
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-758](https://openairdocs.org/tcds/A-758)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/731D7C01A5F78A89862570CE006F8B5D.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4-1633

## ADs that name it (0)

None.

## Approved models (1)

- Aircraft Parts & Development Corp. A Series ([TCDS A-758](https://openairdocs.org/tcds/A-758))

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