# STC SA1728GL

- Type: Supplemental type certificate
- Status: Current, Surrendered
- Holder: GTE Airfone Incorporated, United States
- Description: Installation of an air to ground public telephone communication system(Seatfone). STC SA1725GL must be installed.
- Applied: March 4, 1992
- Status date: November 18, 2002
- 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/1A96AFF462F8211786256CE0005A8549.0001
- DRS record last changed: December 6, 2025
- Page: https://openairdocs.org/stc/SA1728GL

## ADs that name it (0)

None.

## Approved models (1)

- The Boeing Company 747-400 Series ([TCDS A20WE](https://openairdocs.org/tcds/A20WE))

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