# STC SA2931SO

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: Delta Airlines Inc, United States
- Description: Installation of Bendix/King CAS-81 TCAS II System and dual TRA-67 Mode S transponders.
- Applied: March 25, 1991
- Status date: July 9, 2008
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A16WE](https://openairdocs.org/tcds/A16WE)
- Certificate PDF: https://openairdocs.org/files/sha256/23/f6/23f62dadb3548caafb5a73fb2607b31d282088aaaf26499283b39b9707514958
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/D6102F45A5427D1C862574CE0062768C.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA2931SO

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 737-300 Series ([TCDS A16WE](https://openairdocs.org/tcds/A16WE))

## What the certificate says

The certificate is a scan without a text layer; open the PDF to read it.

## Every issue (1)

- July 9, 2008: Surrendered, Current. [certificate](https://openairdocs.org/files/sha256/23/f6/23f62dadb3548caafb5a73fb2607b31d282088aaaf26499283b39b9707514958)

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