# STC SA3294WE

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: US Airways, Inc, United States
- Description: Modification by installation of dual mach/airspeed warning system.
- Status date: January 20, 1977
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS 6A6](https://openairdocs.org/tcds/6A6)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/3DDD972B045BFA5A85256CC2000A967C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA3294WE

## ADs that name it (0)

None.

## Approved models (2)

- Tracor Flight Systems Inc. 340 ([TCDS 6A6](https://openairdocs.org/tcds/6A6))
- Tracor Flight Systems Inc. 440 Military C-131E ([TCDS 6A6](https://openairdocs.org/tcds/6A6))

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