# STC SA1-128

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Randolph Manufacturing Co, United States
- Description: Dry vacuum pump 113A1 for counter- clockwise engine accessory drive and 113A2 for clockwise drive, or 10-113-1 and 10-113-2.
- Product: Aircraft, Single-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 1A6](https://openairdocs.org/tcds/1A6)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/745696DA8226CF8085256CC1007F3B87.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA1-128

## ADs that name it (0)

None.

## Approved models (1)

- The New Piper Aircraft Inc. PA-22 ([TCDS 1A6](https://openairdocs.org/tcds/1A6))

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