# STC SA3-73

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Northwest Airlines Inc, United States
- Description: Revise Minneapolis-Honeywell turbo- supercharger control system.
- Status date: January 1, 1960
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A-812](https://openairdocs.org/tcds/A-812)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/7AC3C50B40234E42862570CB00585EF3.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA3-73

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 377 ([TCDS A-812](https://openairdocs.org/tcds/A-812))

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