# STC SA1-513

- Type: Supplemental type certificate
- Status: Current, Amended
- Holder: Airwork Corporation, United States
- Description: Enrichment of auto lean mixture setting by installing auto lean jet P/N 22244-3000cc in PD-12F13 injection carburetor on Pratt & Whitney R-1830-75 engines.
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-669](https://openairdocs.org/tcds/A-669)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/6EBF6B41F7EDA3BE85256CCB00601821.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1-513

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation DC-3 Series ([TCDS A-669](https://openairdocs.org/tcds/A-669))

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