# STC SA2774SO

- Type: Supplemental type certificate
- Status: Current, Issued
- Holder: Delta Airlines Inc, United States
- Description: Installation of dual Bendix TRA-67 Mode S transponders.
- Status date: May 14, 1990
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A6WE](https://openairdocs.org/tcds/A6WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/2F456A6317996EA685256CC20008C8D7.0001
- DRS record last changed: December 5, 2025
- Page: https://openairdocs.org/stc/SA2774SO

## ADs that name it (0)

None.

## Approved models (1)

- McDonnell Douglas Corporation MD-88 ([TCDS A6WE](https://openairdocs.org/tcds/A6WE))

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