# STC SA4198NM-D

- Type: Supplemental type certificate
- Status: Current, Reissued
- Holder: Martin Aviation LP, United States
- Description: Installation of Dual Mode S trans- ponders and antennas, and TCAS II(provisions only) and antennas
- Status date: April 12, 1995
- Product: Aircraft, Large Multi-Engine
- Certification basis: Part 21
- Data sheets: [TCDS A20WE](https://openairdocs.org/tcds/A20WE)
- FAA DRS: https://drs.faa.gov/browse/excelExternalWindow/23AB176C2DC59FC585256CC2000E3A54.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA4198NM-D

## ADs that name it (0)

None.

## Approved models (2)

- The Boeing Company 747-200 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))
- The Boeing Company 747-300 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

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